The Fund's investment strategy focuses on Energy MLP Funds with 0.79% total expense ratio. The minimum amount to invest in AIM Investment Funds (Invesco Investment Funds): Invesco SteelPath MLP Select 40 Fund; Cls R6 Shs is $1,000,000 on a standard taxable account. AIM Investment Funds (Invesco Investment Funds): Invesco SteelPath MLP Select 40 Fund; Cls R6 Shs seeks total return. OSPSX invests all of its net assets (at least 80%) in the equity securities of a minimum of 40 MLP investments of issuers that are engaged in the transportation, storage, processing, refining, marketing, exploration, production, and mining of minerals and natural resources.