Ladies and gentlemen, thank you for standing by. At this time, all participants are on a listen-only mode. Later, we will conduct a question and answer session. At that time, if you have a question, simply press star, then the number one on your telephone keypad. If you would like to withdraw your question, press the pound key at any time. As a reminder, this conference call is being recorded January 30th, 2019. I would now like to turn the call over to Dave Cresci, Investor Relations Manager at MarketAxess. Please go ahead.
Good morning. Welcome to the MarketAxess fourth quarter 2018 conference call. For the call, Rick McVey, Chairman and Chief Executive Officer, will review the highlights for the quarter and provide an update on trends in our businesses. Then Tony DeLise, Chief Financial Officer, will review the financial results. Chris Concannon, President and COO, also joins us for the call today and will make some brief remarks. Before I turn the call over to Rick, let me remind you that today's call may include forward-looking statements. These statements represent the company's belief regarding future events that, by their nature, are uncertain. The company's actual results and financial condition may differ materially from what is indicated in those forward-looking statements.
For discussion of some of the risks and factors that could affect the company's future results, please see the description of risk factors in our annual report on Form 10-K for the year ended December 31st, 2017. I would also direct you to read the forward-looking statement disclaimer in our quarterly earnings release, which was issued earlier this morning and is now available on our website. Now let me turn the call over to Rick.
Good morning. Thank you for joining us to discuss our fourth quarter 2018 results. This morning, we reported strong fourth quarter results, driven by record market share across our core products and record Open Trading activity. Overall trading volume of $442 billion was up 24% compared to Q4 2017. Our estimated U.S. high-grade market share reached a record of 19.3%, up from 17.6% last year. Estimated high-yield market share shows especially strong growth and reached a record of 10.9%, up from 6.3% in the same period last year. Open Trading had a record quarter with volume of $118 billion, up 96% year-over-year. Fourth quarter revenue of $112 million was up 14% compared to Q4 2017. Operating income for the quarter was $54 million. Diluted EPS was up 38% to $1.21.
According to Greenwich Associates Institutional Investor Survey published in the fourth quarter, MarketAxess maintained its leading position in U.S. credit electronic trading with an estimated 85% market share. Before we move into further review of our results, I am pleased to share two exciting new developments. Chris Concannon joined MarketAxess last week as our President and Chief Operating Officer on the same day we moved into our new corporate headquarters in Hudson Yards. We believe that Chris brings a unique set of skills to the company, and he will join us later in the call today. Slide four highlights our full-year results and continued strong growth rates. 2018 marks the tenth consecutive year of record trading volume, revenue and operating income. Full-year 2018 revenue was a record $436 million, up 10.7% from 2017, and diluted EPS was a record $4.57, up 17.5%.
Commission revenue for 2018 was up 10% year-over-year to a record $391 million, as overall trading volumes reached a record $1.7 trillion, up 17.5%. Estimated U.S. high-grade and U.S. high-yield market share both reached records, as we experienced strong volume growth across core products. These gains in market share were driven in part by the growing number of client firms active on the platform. In 2018, more than 1,500 institutions were active on the system, with 850 firms trading three or more products. Finally, our 2018 results continue to show attractive long-term growth with five-year compound growth rates of 13% for revenue and 20% for EPS, creating superior returns for MarketAxess shareholders. Slide five provides an update on market conditions. Fourth quarter market conditions were favorable for our business. Credit spreads widened and credit spread volatility increased.
New issue activity was lighter than normal, and investment managers experienced outflows. Secondary liquidity was challenging, and dealers and investors both relied on MarketAxess for a higher percentage of their trading needs. Our expanded liquidity pool with Open Trading is especially valuable in this kind of environment. We have seen a stark reversal of market conditions in January, as investor sentiment has moved back to risk on. The new issue calendar is active, fund flows are positive, order flow has shifted predominantly to offer wanted, and both high-grade and high-yield credit spreads have tightened significantly. In this environment, average daily trading volumes on MarketAxess month-to-date are still higher than both Q1 and Q4 2018 levels, but high-grade and high-yield market share is significantly below Q4. Slide six provides an update on Open Trading. Open Trading experienced an exceptionally strong fourth quarter.
Adoption accelerated during the quarter with volumes up 96% to a record level of $118 billion. Average daily Open Trading volume surged to $1.9 billion, and average daily open trade count was 5,600 trades. Open Trading represented 27% of our volume in Q4, up from 17% last year. Over 344,000 Open Trading transactions were completed in the fourth quarter, up from 168,000 in Q4 2017. Open Trading liquidity providers or price makers on the platform drove approximately 1.7 million price responses, representing a 128% increase in activity in the fourth quarter. During the quarter, approximately 790 firms provided prices through Open Trading. This significant increase in client and dealer trading activity translated into increased transaction cost savings for market participants. Liquidity takers saved an estimated $57 million in transaction costs through Open Trading on the system, up 175% from the fourth quarter of last year.
Participants benefited from average transaction cost savings of approximately 2.5 basis points in yield when they completed a U.S. high-grade transaction through Open Trading protocols. On an annualized basis, Open Trading liquidity takers saved $163 million, an 82% increase from 2017. Open Trading volume is growing rapidly across all four core products as dealer and investor clients embrace Open Trading as an important source of new liquidity. Slide seven provides an update on our international progress. Our ongoing investment in international expansion continues to show returns, with international client volume up 20% to $456 billion in 2018. Growth over the longer term has remained strong with a compound five-year annual growth rate of 45% in international client volumes. The increase in volumes in 2018 was driven by the more than 740 active international client firms trading on the system.
Our emerging market product continues to perform well with five-year compound growth in trading volume of 32%. We are seeing especially good results in the 26 EM local markets available for trading, with five-year compound growth over 100%. Eurobond volumes were up 31% for the year, which we believe is driven by healthy market share gains. Our preparations for all Brexit scenarios are on track, and our new office in the Netherlands is staffed and up and running. We are pleased with our progress internationally and continue to invest in the significant growth opportunity outside of the United States. Now let me turn the call over to Tony to discuss the financial results in greater detail.
Thank you, Rick. Please turn to slide eight for a summary of our trading volume across product categories. U.S. high-grade volumes were up 20% year-over-year to $241 billion for the quarter, due to a 1.7 percentage point increase in estimated market share, coupled with a 9% increase in estimated U.S. high-grade TRACE volumes. In spite of weak market volumes, our other credit category trading volumes were up 32% year-over-year. We estimate that market volumes across emerging markets, U.S. high yield, and European corporate bonds were down around 10% in the aggregate. The standout this quarter was high-yield bonds, where higher volatility in spreads and low new issuance resulted in an estimated 4.5 percentage point increase in market share and a 66% increase in trading volume. On slide nine, we provide a summary of our quarterly earnings performance. Overall revenue was up 14% year-over-year.
The 24% increase in trading volume resulted in a 15% uplift in commissions. Information services revenue was up 4% on a quarterly basis and 9% on a full-year basis. Post-trade services revenue was up 6% on a quarterly basis and 38% on a full-year basis. The step function increase in post-trade services revenue in 2018 was principally due to a combination of new MiFID II services and new customers. In 2019, we expect information services and post-trade services revenue will grow in the low double digits. Expenses were up 18% year-over-year, and operating income was up 11% year-over-year. Excluding duplicate rent expense recognized during the build-out phase of the company's new corporate offices, operating income was up 15%. The effective tax rate was 18.3% for the fourth quarter and 20.7% for full year 2018.
During the quarter, we recognized $1.9 million of excess tax benefits related to share-based compensation awards. Our diluted EPS was $1.21 on a stable diluted share count of 37.8 million shares. On slide 10, we have laid out our commission revenue, trading volumes, and fees per million. Total variable transaction fees were up 17% year-over-year, as a 24% increase in trading volume was offset by lower overall fee capture. On a year-over-year basis, lower duration resulted in a reduction in our U.S. high grade fee capture, and revisions to the Eurobond fee plan enacted in early 2018 resulted in lower Eurobond fee capture. That said, we've seen little movement in our U.S. high grade fee per million over the past four quarters.
Years to maturity of bonds traded on the platform was unchanged sequentially. There was no significant change in the percentage of volume in each trade size bucket. Our other credit category fee per million increased by $10 on a sequential basis. A higher percentage of volume in the other credit category was derived from high yield in the fourth quarter, driven by a 31% sequential growth in high yield trading volume. There was little change in the fee capture at the individual product level during the quarter. Slide 11 provides you with the expense detail. Compensation and benefits costs accounted for almost half of the $3.4 million sequential uplift in expenses. An increase in the variable incentive accrual, which is tied directly to operating performance, and the impact of additional headcount and higher share-based compensation drove the growth in compensation and benefits costs.
We experienced sequential increases in several other expense categories. Most notably, higher clearing costs was due to the 33% sequential increase in Open Trading volume. Higher trade show and promotions drove marketing expense up. Higher general and administrative costs was largely due to a successful emerging markets charity day donation. On slide 12, we provide balance sheet information. Cash and investments as of December 31st were $486 million. Free cash flow reached $175 million in 2018. Dividends and share repurchases aggregated $95 million. Capital expenditures in 2018 were $48 million and include $25 million related to the build-out of our new Hudson Yards office space. Our recurring quarterly dividend is an important element of our capital management strategy. With the announced 21% increase in the quarterly dividend to $0.51 per share, we have doubled the dividend level in the past three years.
During the fourth quarter, we repurchased a total of 30,000 shares under our share buyback program. Our board authorized a new $100 million share repurchase program to replace the plan expiring at the end of March. As has been our practice, the principal purpose of the repurchase plan is to offset dilution from employee equity grants. On slide 13, we have our 2019 guidance for expenses, capital expenditures, and the effective tax rate. We expect the total 2019 expenses will be in the range of $224 million-$256 million. The midpoint in that range suggests an approximate 12% year-over-year increase in expenses, which will be similar to our growth rate over the past three years. 2019 capital expenditures are expected to range from $25 million-$30 million, of which roughly half relates to software development costs.
We expect that the effective tax rate for full year 2019 will range from 20.5%-22.5%. The guidance range incorporates an estimate for excess tax benefits related to share awards of approximately $6 million, which will be similar to the amount recognized in 2018. Let me turn the call back to Rick.
Thank you, Tony. We are pleased with the strong market share gains in the fourth quarter and for the full year in our core products. Open Trading growth is accelerating and rapidly becoming an essential pool of liquidity for investor and dealer clients. Business expansion is on track internationally, and we are investing for the future. I am happy to introduce Chris Concannon, who will make some brief remarks about the opportunity he sees ahead for MarketAxess.
Thanks, Rick. It's great to be here, and it's great to be part of this amazing team that you've built. I'm very excited about the opportunity. While it is only day seven on the job, I'd like to share some exciting early observations about the company and the opportunity ahead. First, I'm pleased to say that I've finally graduated from the minor leagues of equities to the major league called fixed income, the largest asset class on the planet. MarketAxess sits in the middle of this giant market, and that market is in the early stages of a transformation to electronic trading. MarketAxess is the clear leader in that space, and it is still early days of a multi-year transformation.
Second, Rick mentioned the client cost savings on the company's Open Trading platform. That execution quality that MarketAxess is delivering is an opportunity to drive more business to the company's platform as clients become more educated about the superior execution quality. The prices that clients are achieving are setting the standard for best execution in the fixed income market. Finally, I'm very excited about the market data opportunities that the company has. Both our real-time pricing information and our historical pricing information is a gold source of execution quality in the corporate bond market and provides us with a wonderful revenue opportunity. Rick, thanks for letting me join the impressive team, and I think we're ready to take Q&A.
Thank you, sir. Ladies and gentlemen on the phone, if you have a question at this time, please press star and one. If your question has been answered or you wish to remove yourself from the queue, please press the pound key. Our first question comes from Rich Repetto from Sandler O'Neill. Please go ahead.
Yeah. Good morning, Rick. Good morning, Tony. Chris, welcome to the show.
Good morning, Rich.
Thanks, Rich.
I guess the first question is, on Open Trading, great increase, the 27% of the market. I know Chris has capabilities and knowledge in the sort of the market that's more liquid and faster trading. I guess the question is, how do you plan to grow? You've been growing it systematically. What drove, besides, I guess, volatility, up to the 27%? What new things do you have, Rick and Chris, in mind to go grow further in 2019?
Thanks, Rich. I'll start on that one. It was a great quarter, and as you know, liquidity was challenging in credit markets throughout the quarter, which is one of the reasons that clients were leaning on MarketAxess, and Open Trading was more valuable than ever. Part of it is just client trading behavior and adoption. This is especially the case for investment managers. It's pretty easy for them to include MarketAxess Open Trading in their inquiries and take advantage of the system as a liquidity taker. The bigger challenge, but also the bigger opportunity is to see more of them move toward the liquidity provider side. That is a big change in the trading process. It involves changes to their order management and compliance systems and utilizing data engines in real time.
We are starting to see a movement in that direction, and in my opinion, that will be one of the bigger opportunities in the years ahead. The other piece that we're seeing is that by opening up the market in credit, we are enabling new competitors to enter this space and commit capital for market making. The liquidity pool is in fact growing and quarter in and quarter out, we're not only seeing new entrants, the ones that are coming in continue to do more business. That liquidity pool continues to get larger, and as a result, the competitiveness of Open Trading continues to improve. We will continue to invest as well, as you point out, in new trading protocols.
We continue to benefit from leveraging RFQ trading so far, but we think that there are opportunities to participate in other parts of the market to trade with faster protocols. This is one of the many reasons that we're pleased that Chris is here, is that he has seen so many different protocols and knows the pros and cons of all of them during his many years of experience in the equity and foreign exchange markets. It sure feels like fixed income is starting to move in the same direction, and you will see investment in new protocols as part of the Open Trading strategy as well.
Rich, I'll just add, as you know, the managed fund industry is certainly very focused on cost, and it's not only cost of their own infrastructure, but it's cost of trading and trading costs generally. When you look at the statistics that we shared today on the savings that is delivered by the Open Trading platform, that's a pretty attractive enhancement to returns, and much reduced trading costs for the average managed fund. I think that certainly the Open Trading platform is finding a lot of new clients as well as what I'll call same-store sales with current clients, given the cost savings that they're experiencing.
Yes. I would assume, Rick, that the additional liquidity providers you're talking about are more the electronic liquidity providers, market makers. Is that fair?
Yes. I think that there are three pockets of liquidity. Well, I know there are three pockets of liquidity under the hood of Open Trading. One is the alternative market makers who are experienced with electronic market making in other asset classes, and a subset of those from ETF arbitrage strategies that are now in place in credit. The second is extending the dealer community available to investors on their electronic order flow, and the third is buy-side asset managers that are able to take advantage of matching opportunities.
Got it. I guess just one last follow-up would be on expenses and to Tony. Given the range, up, I think it's 9%-15%, I believe is the full range. If you look at that midpoint, I know you had to pay the signing bonus here for the free agent. Even taking that into account, you also had some decreased expenses for the duplicate rent. I guess what I'm saying, it seems like we'd expect it to a little bit offset, maybe a little bit increase, but are you investing or expanding investment in any other initiatives, I guess, is the question.
Yeah. Rich, we continue to invest here, and you heard from Rick a little bit here on changes and enhancements. We have demands from clients around technology and automation. We continue to expand our geographic reach, and we're expanding our addressable market. We're supporting new protocols. We're addressing Brexit and other regulatory changes. We're also investing in senior management, and Chris is an example of that sitting here. Of course, I'm trying to slice and dice the expense increase here. This isn't to be self-serving, but to just help you bridge the difference. If you look at Chris coming on board, we had a long-term employment agreement for Rick. They were both 8-K'd, so it's both public knowledge. There's other senior management investments. We think the time is right, and we're at an inflection point.
If you just look at the investment, just humor me, look at the investment in the senior managers. It's somewhere in the $8 million-$9 million range. If you just carve that out, you're looking at an expense increase below 10%. I don't think it should be a surprise given those investments, particularly in senior management. We're also investing. We are investing for the future. A big part of that investment is around headcount. It's across the board. There's a big investment in technology resources anticipated. We're not shy about the expense increase. Again, we think the time is right to continue on that investing path.
I'd just add to that. We've mentioned in prior calls, the demand for automation and credit trading has never been higher. What we are seeing is that investor clients that are trying to reduce trading and transaction costs are increasingly moving toward automation and auto execution, especially for the smaller trade sizes. Dealers, as we know, have been trending toward Algo market-making for a greater percentage of their credit trading. We're responding to those demands, and we are highly confident that the long-term returns on those investments are going to be very attractive for our shareholders.
Great. That's very helpful. Thanks, guys.
Thank you. Our next question comes from Chris Allen from Compass Point. Please go ahead.
Morning, guys. Yeah, just wanted to talk a little bit more about the environment. You guys know that January volumes initially were way up, market share kind of came in, even though issuance levels were basically non-existent for most of the month. Is this a function of people just prepaying for issuance until the markets came back? Or just any color around that would be helpful.
Sure. New issuance has actually been pretty decent this month. It's not at last January's levels, but the capital markets have been open and the inflows have been helping to support new issues at tighter spreads. Similar to the equity markets, if you really look at the trend in credit spreads, there was consistent widening going on for four months toward the end of 2018. Literally in three weeks, we reversed half of that move. This went completely the opposite direction with respect to risk-on. In addition to new issues being far higher than they were certainly in December, you do see asset managers that have seen significant inflows. We hear anecdotally that many of those inflows are coming from international sources, including Asia. There is intermediation of those flows that we oftentimes don't see.
There also have been an increase in story bonds that have been a big part of TRACE, where there's high volatility in issuers like Pacific Gas that we've seen through the months. I think the core flow business where we excel continues to perform very well in January, we have some ideas on how to participate more fully in other pockets of activity. I think probably the right way to look at this is if you took the average of our December and January market share, you'd probably get a truer reflection of the long-term trends because December and January are both unusual months in terms of the flows that are reported into TRACE.
Thanks. Just one more from me. Just distribution fees. Have you seen any changes in people shifting in terms of pricing plans? What's the outlook there moving forward? Anything on the horizon? How should we be thinking about that through 2019?
Chris, I wish I could tell you with complete clarity. We give dealers the choice of plans, and some have a distribution fee, some are all variable or have an execution fee. It's tough to predict. I'll tell you, just looking at the fourth quarter, when you look at that small change for U.S. high grade in particular, we did have one dealer migrate to the distribution fee plan in the fourth quarter. That gave rise to about a $400,000 increase in distribution fees. I'm cautious about giving the forward guidance just because it's difficult to predict. Even things like unused minimum fees, it depends on activity for those individual dealers, so it can bubble around month to month.
I'll give you one thing, though, just in terms of what we have clarity on today, we do have one dealer in the first quarter, one dealer effective January 1st, that is moving from the high-grade distribution fee down to the all-variable fee. All things being equal, lots of things in the mix, but all things being equal, that one dealer migrating would cause a reduction in distribution fees of about a half a million dollars in the first quarter. I do caution there's lots of moving pieces, even in the distribution fees.
Thanks, DeLise.
Thank you. Our next question comes from Kyle Voigt from KBW. Please go ahead.
Hi. Good morning.
Hey, Kyle.
Chris, good to have you on. Rick, maybe we can start just with the hire of Chris. Obviously, it was a big hire for MarketAxess. It deepens your senior leadership team significantly. In terms of the company's and the board's motivation to go out and make this hire, just wondering if you could speak to two things. One, Chris has extensive experience in M&A and integrating large businesses at Bats and Cboe. Was that experience viewed as valuable and a necessary addition to the experience you already have within your leadership team? Then secondarily, I know you signed an employment contract through 2025, Rick, but can you speak a bit about whether succession planning by the board was also a key consideration in the hire?
Sure. No, happy to talk about both of those.
You sure you don't want me to answer?
On the first question on M&A, of course, that was one of the many skills that Chris has that I in particular was attracted to. We have built the company, as you know, almost entirely through organic growth. We're in a great position to think both about the next wave of organic growth, but also be able to be opportunistic about M&A opportunities. Chris has been very successful with various M&A strategies at a variety of different companies that he's worked for in the past, and we're excited to have him lead our corporate development effort. I would say, though, it doesn't address either of the two questions that you asked, but equally important is the skill set around trading automation that Chris brings to the company, that are clearly showing real traction now in credit.
It is really just in the last two years that dealers have moved to algo trading, high-frequency trading firms have shown up in credit. Investors are moving to auto execution. The litany of experiences and knowledge of trading protocols that Chris has, we think is ideally timed for the changes that are taking place in credit. We couldn't be any more pleased to have those skills around the table as well. Of course, we are now a much larger company than we were four or five years ago, and the board has responsibilities at all levels of the management team around succession planning.
That was also one of the key things that we were seeking to accomplish with bringing Chris on board. From my perspective, he checked a lot of boxes, and we're really excited to have him here working both with the management team and the board.
Great. Thank you. Second question is really from the growth in high yield in the quarter, it was exceptional. We can see the Open Trading with nearly half the volume there. I know ETF market makers are very active in that market, and their activity can really depend on the flows and volume in some fixed income ETFs and funds. Just wondering if you could comment on how much of your high yield volume those ETF market makers drove in the fourth quarter versus a more normalized quarter. I'm really just trying to understand whether we're seeing similarly strong growth from your core institutional clients in that market as well.
Yeah, Kyle. It's Tony here. On the ETF side, you're exactly right. They are an important component to our high-yield trading. While the fourth quarter, the percentage of volume represented by that ETF community was up, it was not up appreciably. What that tells you is that we had growth from traditional long-only clients and from the ETF community. Just to put it in perspective, it was around 30% of the high-yield volume. I would tell you, at other points in time in the past, that percentage, for example, when energy blew up back in the fourth quarter of 2015, that percentage was closer to 40%. It's been bubbling around 25% or so. Not an appreciable change, growth across all clients.
Great. Last one for me is really just around some of what you touched on earlier, maybe streaming price protocols. Rick, I think you maybe alluded to this, is that going to be a significant area of investment when you talk about investing in new protocols? I know that's probably a wide array of things, is that a key component of that? I'm wondering where you see the opportunity for streaming price protocols to become more frequently used. Is it a subset of more liquid bonds, or is the opportunity a lot larger than that?
Yeah. I would point to two things. Yes, it's one piece of a much broader strategy, an important part of the investment budget that Tony talked about earlier is technology developers and greater output in terms of new protocols available for our clients. There are two places where I think faster protocols, including streaming protocols, make a lot of sense. One is on newly issued bonds. As you know, we don't participate all that actively on the first week or so of trading following new issues. We do think that there are ways for us to participate more fully through quicker and protocols and streaming prices. The second is really in the retail space, and we do think we have an opportunity to invest organically in retail and private client business and have a bigger impact in that client segment.
Great. Thank you.
Thank you. Our next question comes from Patrick O'Shaughnessy from Raymond James. Please go ahead.
Hey, good morning, guys.
Hello, Patrick.
Good morning, Patrick.
I was hoping that you could elaborate a bit more on that market data opportunity that Chris spoke to in his prepared remarks. Historically, you've used your data as a means to attract order flow and hopefully increase transaction revenues. Is that philosophy going to change going forward?
Patrick, it's Chris. I'll take that. No, there has to be a healthy balance between attracting new clients and new business, and not overcharging for that entry or charging too much of an entry fee. There is just a really a wealth of data within the current platform. If you look at the growth of Open Trading, the data on depth and liquidity, which is a key factor in the cost of trading a fixed income instrument, so that the more we can distribute that data, it's not just a price increase game, it's also a distribution and being smart around the data that we are sharing or haven't shared just yet. I think the opportunity is both in the form of new products as well as in fees that are smart, but don't damage the growth of the product.
One thing I would add, Patrick, is that when we look at our peers that have more developed data businesses, oftentimes they are doing that in partnership with the large data companies for distribution. That is something that we really have not done much of in the past, but we are going to test some new distribution channels in the new year. We're optimistic that that will also help in creating better traction in data revenue.
Got it. Appreciate that. Then, I guess speaking of initiatives that Chris is going to be tasked with. Regarding M&A, how broad of a net would you guys think of casting here? What types of deals do you think might hit your radar going forward?
The big picture here is that nothing has changed in our enthusiasm for the global credit opportunity. It's an enormous market, and we think we have unique competitive advantages. Our focus is squarely on continuing to deliver returns in that very large market opportunity. It doesn't mean that we wouldn't look at alternative asset classes, including other areas of fixed income, but our focus today continues to be on credit. I think what we've said in the past is still true today. We are interested in product capabilities that would extend our offering to our institutional clients, whether it be data offerings, trading offerings, or post-trade. We think there could be interesting opportunities in all three of those. Nothing specific to comment on today, but we're excited to have Chris here to really ramp up our thoughts and our creativity around corporate development.
Great. Thanks, and maybe one last quick one from me for Tony. You kind of gave the commentary around what ADV was compared to previous periods and talked about market share. Could we actually get the month-to-date ADV that you guys have seen across your products?
This is on January, Patrick?
Yeah.
We've got two more days left here. Rick gave some comments in the prepared remarks where ADV's running ahead of both the fourth quarter of last year and the first quarter of last year. Be a little patient. We'll have the numbers out on Monday.
All right. Fair enough. Thank you.
Thank you. Our next question comes from Jeremy Campbell from Barclays. Please go ahead.
Hey, thanks. Rick, I think you mentioned that broader kind of liquidity taker adoption in the more volatile markets during fourth quarter as part of the uptake in Open Trading usage. Historically, do those clients tend to stick with Open Trading after volatility maybe dies down a little bit, or do they kind of back off of that at some point?
Well, we've seen nothing but them sticking with Open Trading and increasing their activity. Sequentially, we've had a pretty consistent track record of seeing Open Trading adoption virtually every quarter. In a quarter like last quarter, where the price improvement percentages were growing for liquidity takers and the level of price improvement on average per trade was higher, it's a powerful reinforcement of the benefits of having orders into the MarketAxess system. We are seeing a continuation of that trend in January, even though the market conditions are very different. As I mentioned, our view is that Open Trading was especially valuable in the fourth quarter during challenging liquidity times.
Great. Chris, congrats on the new role from us equity analysts still toiling there in the minor leagues. I know it's super early days here, but Rick and Tony, is there any kind of current initiatives that MarketAxess has had going on that you think Chris can really accelerate across the goal line in 2019? Chris, I know it's day seven here, but, you listed a bunch of areas of focus here, but what would be the top of your hit list as far as rolling up your sleeves here at MarketAxess?
Well, we just talked about Open Trading, that opportunity is just a phenomenal opportunity. As I think about the buy side experiencing a transformation of electronic trading in what has been a largely much more manual market, they need a lot of assistance from the market that's forming price. When we think about order types and enhancements to the trade platform, I think that's an important area that I can help.
I've seen transformations in both the foreign exchange market, as well as the equity market. There's things that the end user needs that help them execute their trading activity. To follow on to Rick's point on Open Trading, I just think when these clients experience the Open Trading execution quality, they continue to come back. It's kind of like eating a Chick-fil-A. Once you had one, you keep adding more and more to your diet.
Maybe you do, Chris.
Great. Thank you.
Thank you.
Our next question comes from Alexander Blostein from Goldman Sachs. Please go ahead.
Hey, guys. Good morning. Chris, welcome as well. Question around distribution plan, specifically in high yield. I know you guys made some changes last year, with a handful of dealers moving over, but as that part of your liquidity pool continues to grow, and it sounds like participation from ETF market makers has also been a meaningful contribution, how should we think about more of the participants switching to the distribution plan over time within high yield?
Alex, from when we adopted that new plan August 1st of last year, August 1st of 2017, we haven't had any migrations. You've seen more of that in the high-grade plan. We're not tracking anything right now. Those dealers do enjoy seeing the disclosed order flow. Even with the increase in Open Trading percentage, the disclosed dealers are also increasing their participation on the platform. Again, we're not tracking anything there, and unlike on high grade, where it does tend to swing around a little bit.
Gotcha. I heard your commentary around expenses for 2019, with some incremental uplift here as well. I guess bigger picture, when we take a step back, how are you guys thinking about the trade-off between growth and expenses versus market share gains and maybe just a little bit of a near to medium-term outlook on expense growth?
We're going to continue to invest, Alex. We oftentimes do talk about operating margins and where margins are running. Look at over the past four years now, margins have been hovering around 50%. Yet at that same time we've been investing heavily, again, to expanding addressable market and add new protocols and address Brexit, and now with the senior management hires. We would do anything we could to increase market share. Our view around the table is now is the time to invest. If that means that margins, at least in the near term, if margins are kind of flat lined at 50%, that's not a terrible outcome. It's tough to look out. If we had a crystal ball, even there, it's tough to look out beyond the next year or so. I think there is leverage in the margin, in the business.
I think it's more about growing the top line. It's more about growing market share, adding new products, monetizing more on the data side. That's where we'll see the leverage come through, and market conditions are supportive, and Open Trading's a bigger piece of what we're doing. That's where we'll see the margin expansion coming through.
Alex, it's Chris. I'll just mention, all of our new hires are expected to grow top line.
Goes without saying. All right, great. Thanks, guys.
Thank you. Our next question comes from Hugh Miller from Buckingham. Please go ahead.
Good morning.
Welcome back, Hugh.
Thanks. Just had a question. You guys obviously have historically for client-to-dealer trading seen a difference between spread widening versus tightening scenarios in terms of the hit rate. Was wondering, as we think about growth in Open Trading? Does that play a factor in that type of scenario with client-to-client type trading, in terms of the hit rate for buying versus selling? Or is that still similar to what we've seen in client-to-dealer trading?
Hugh, I can't say there's been a big change in overall hit rates, whether it's on the offer side or the bid wanted side. We have the dynamics. Typically, the hit rate is higher on the bid wanted side versus the offer wanted side. That trend or that difference has continued to play through. Of course, the more price responses that we get in, the better chance of getting a trade executed, the more value we're delivering, that drive more order flow on the platform. That's the model. I can't say looking over the past several years, you've seen an appreciable change in that hit rate, whether on the bid side or the offer side.
Okay. Certainly helpful. Then, just in terms of the opportunities in 2019, can you talk a little bit about dealer-to-dealer trading, what you're seeing on the platform in terms of adoption, and how you see that as a channel for growth in 2019?
Sure. I'll take that one, Hugh. Fourth quarter was interesting because the level of spread widening I think caught the market by surprise during the quarter, and there was a fair amount of interest in reducing credit risk by investors and dealers. We did see a nice uptick in dealer-initiated Open Trading order flow. I think what you're starting to see is that this is becoming a very attractive liquidity pool for the dealer community. The breadth of liquidity that we have, both investors and other dealers on the platform, is a great alternative for dealers when they're looking to reduce balance sheet and shed risk. When they've tested the system, they've had good results, and that has caused them to increase activity, especially in strained market environments like the one that we had in the fourth quarter.
That's helpful. Do you have a sense as to what percentage of the overall trading that would represent in Q4 or historically?
Hugh, if you looked at pure D to D, in the fourth quarter, we were a shade over 5% market share, pure D to D. Of course, what Rick is saying around the activity level and the increase in our dealer-initiated orders, that's up appreciably year-over-year.
Got you. Great. Thank you for the color there. Then I think in the prepared remarks you guys had mentioned, obviously, you gave some color in terms of the benefits from Open Trading from a dollar standpoint. I think you mentioned that you're seeing roughly about a 2.5 basis point benefit in Open Trading for U.S. high grade relative to trades not through Open Trading. I was wondering, is that correct the way that I have that? As well, how has that changed over time from the onset of Open Trading?
Hugh, yes, that's what Rick in the prepared remarks mentioned the 2.5 basis points. Just to put that into dollar terms. On average, every basis point in yield is somewhere around $750. Let's say rough numbers. 2.5 basis points, you're looking at about $2,000 per million in savings. Rick didn't talk about the high yield number that was closer to $0.28 or $2,800 per million notional trade in the fourth quarter. Across the board, fourth quarter, the reason why you saw that big jump in the savings, not only were OT volumes up, but the capture or the savings or the price improvement across each product was also up in the fourth quarter. That undoubtedly had a lot to do with where spreads were going. Across both high yield and investment grade, you saw spreads widening and just delivering more cost savings in OT in that environment.
All right. Great color there. Thank you so much.
Thank you. Our next question comes from Chris Shutler from William Blair. Please go ahead.
Hey, guys. Good morning.
Morning, Chris.
Rick, correct me if I'm wrong on this, but I think you rolled out Auto-X capabilities maybe a year ago or so. Can you just talk about the uptake so far on Auto-X and any stats or trade volumes that you're doing today that are Auto-X or algo amongst both buy-side and dealers?
I don't think we have the exact stats at the ready this morning, Chris, but happy to follow up with you on that. Sequentially, we have seen attractive growth in both the number of clients using Auto-X in Europe and the U.S. as well as the percentage of their trades that are going through Auto-X. It's early days in credit, but the trends are very clear, and we'd be happy to come back to you with the exact percentage increases that we're seeing.
Sounds good. In Open Trading, I guess the percentage of Open Trading today that's buy-side to buy-side, I know it's a pretty small percentage, but any color there and trends?
I wouldn't call it small. There has been in past calls, there are the three main pools of liquidity that are coming through Open Trading, the alternative market makers, the expanded dealer community participating in orders, and then the buy-side. The trends have been pretty stable in terms of buy-side participation in Open Trading liquidity provision. It's still an important source that's running around a quarter of the volume that is done on the system.
Okay. Got it. Then lastly, for Tony, the tax rate guide was a little below expectations again. Just walk us through kind of how to think about the normalized tax rate and how much longer you'd expect to enjoy this lower tax rate.
That's a good question. The 2018 tax rate full year was just a shade under 21%. You're right, there's lots of things that go into tax rate. There's the mix of income by jurisdiction, there's permanent items and credits, then there's these discrete items like the excess tax benefits. If we pulled out the excess tax benefits from 2018, the rate would've looked more like 23.5%. Even what we're guiding to right now, if you pull out what I said again, the prepared remarks around $6 million in excess tax benefits, you're going to get back to that mid 23.5%. The second part of the question just on how long can this last, what's the future look like for these excess tax benefits? We are sitting on around $16 million of excess tax benefits coming into 2019.
Tough to tell where it's going to end up because it's depending on the stock price when options are exercised, restricted stock vests. Also, we don't know the exact timing of when the options will be exercised. I'll give you in the near term, 2019 and 2020, what we're tracking right now, based on when restricted stock has to vest and when options actually expire, we're looking at about the same number at about $6 million this year, about $6 million next year. That could move, but that's what we're looking at right now.
All right. Super helpful. Thanks, Tony.
Thank you. Our next question comes from Rich Repetto from Sandler O'Neill. Please go ahead.
Yeah. Hi, guys. I promise I'll keep this short here. As I listened to all the questions on the Open Trading, the one thing that occurs, it's still a request for quote even though it's sort of an automated open to all request for quote. I guess the question is, this follows on the automated execution, someone referred to that. I know you're building the liquidity side with the electronic liquidity providers, do you also have to get the buy side here, to also buy in and move more to the automated execution if you really want to grow Open Trading volumes? I guess that would be the question.
Yeah. I'll take the first crack at that, Rich. I think that this is the first in a series of steps that the buy side is likely to take with automated means of trading and credit. This is the most obvious, where they're taking the smallest tickets, with the base of real-time data that is now available to them, they're setting parameters within which they're willing to execute the trade with no manual intervention. When you think forward, that ability to be able to price a transaction without trading intervention is a precursor to being able to be more responsive in Open Trading as a price provider. I think, the buy side, as you well know, is under tremendous cost pressures.
They're always interested in transaction cost savings that will improve portfolio returns, this is the beginning of what I think will be a multi-year investment in automated trading tools by the buy side. Ultimately, those tools will make them better equipped to be responsive to matching opportunities on the system.
Got it. Thanks, guys.
Thanks, Rich.
Thank you. Our next question comes from Kyle Voight from KBW. Please go ahead.
Hey, sorry, just one follow-up. Just that Open Trading continue to grow rapidly, just wondering if you could give us an update on your clearing and operational plans for that part of the business. I know you've built out the risk management functionality to kind of support that volume growth, are we closer today to maybe heading in a different direction from an operational standpoint, just given the size and the pace of the growth there?
We are benefiting from tiered pricing with our settlement partner currently. You're seeing the cost of settlements trend down, which is obviously a great thing for us. We're in early stages of reviewing our long-term settlement strategy. There are lots of scenarios that could evolve over the next three to five years. We've increased the level of automation that we have in our settlement process to improve the risk controls, and we're benefiting from lower pricing because of the discounts that take place at higher average daily ticket counts with Pershing. In the near term, nothing specific, but we do think there are opportunities there down the road.
Okay, thanks.
Thank you. Our last question comes from Patrick O'Shaughnessy from Raymond James. Please go ahead.
Hey, thanks for taking my last question here. Curious about your block market share in the fourth quarter and whether your fourth quarter market share gains were across both blocks and non-blocks.
Yeah, Patrick. On the market share side, the gains were pretty much across the board. On the block side, we ended up right around 9% for the quarter. If you look over a longer-term basis, say over full year 2018, block share was up close to one percentage point. You look at it overall, we were up a little more than one percentage point overall for all of U.S. high-grade market share. It was across the board over the span of the full year. If you look longer term, obviously the trend looks similar to our market share growth overall when you look longer term of what happens with block trading as well. It was pretty much across the board.
All right, great. Thank you.
Thank you. This concludes our Q&A session. At this time, I'd like to turn the call back to Rick McVey, Chairman and CEO, for closing remarks. Please go ahead.
Thank you for joining us this morning. We look forward to talking to you again next quarter.
Thank you, ladies and gentlemen, for attending today's conference. This concludes the program. You may all disconnect. Good day.