Calamos S&P 500 Structured Alt Protection ETF - October (CPSO)
NYSEARCA: CPSO · Real-Time Price · USD
27.78
+0.02 (0.06%)
At close: May 28, 2026, 4:00 PM EDT
27.78
0.00 (0.00%)
After-hours: May 28, 2026, 4:10 PM EDT

CPSO Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
May 27, 202627.7727.7727.7327.7627.760.03%409
May 26, 202627.7627.7627.7627.7627.760.13%-
May 22, 202627.7327.7427.7227.7227.720.03%6,323
May 21, 202627.7027.7127.7027.7127.710.06%182
May 20, 202627.7027.7027.7027.7027.690.11%117
May 19, 202627.6327.6727.6327.6727.67-0.04%287
May 18, 202627.6527.6827.6427.6827.680.02%230
May 15, 202627.6527.6727.6527.6727.67-0.11%1,025
May 14, 202627.7027.7027.7027.7027.700.08%622
May 13, 202627.6827.6827.6827.6827.680.03%424
May 12, 202627.6527.6727.6527.6727.670.09%1,184
May 11, 202627.6427.6527.6427.6527.650.02%795
May 8, 202627.6427.6427.6427.6427.640.11%8
May 7, 202627.6127.6127.6127.6127.61-0.07%79
May 6, 202627.6327.6327.6327.6327.630.13%623
May 5, 202627.5527.6027.5527.6027.600.22%1,869
May 4, 202627.5627.5627.5427.5427.54-0.16%1,086
May 1, 202627.5627.5827.5627.5827.580.05%2,422
Apr 30, 202627.5027.5727.5027.5727.570.27%429
Apr 29, 202627.4827.5027.4827.4927.49-0.09%11,499
Apr 28, 202627.4727.5227.4727.5227.520.04%228
Apr 27, 202627.5127.5127.5127.5127.51-0.07%-
Apr 24, 202627.5227.5227.5227.5227.520.24%107
Apr 23, 202627.4627.4627.4627.4627.46-0.12%88
Apr 22, 202627.4727.4927.4627.4927.490.15%1,667
Apr 21, 202627.4927.4927.4527.4527.45-0.09%5,915
Apr 20, 202627.4427.4827.4427.4827.48-0.05%1,580
Apr 17, 202627.4627.4927.4527.4927.490.27%821
Apr 16, 202627.4227.4227.4227.4227.420.02%66
Apr 15, 202627.4127.4127.4127.4127.410.13%2
Apr 14, 202627.3827.3827.3827.3827.380.26%156
Apr 13, 202627.2627.3327.2627.3127.310.15%494
Apr 10, 202627.2727.2727.2727.2727.27-5
Apr 9, 202627.2727.2727.2727.2727.270.16%60
Apr 8, 202627.1827.2227.1827.2227.220.58%3,086
Apr 7, 202627.0627.0627.0627.0627.06-0.02%-
Apr 6, 202627.0827.0827.0727.0727.070.04%370
Apr 2, 202627.0527.0627.0227.0627.060.04%2,450
Apr 1, 202627.1027.1027.0527.0527.050.17%1,076
Mar 31, 202626.9427.0026.9427.0027.000.52%100
Mar 30, 202626.8526.8726.8526.8726.86-0.02%268
Mar 27, 202626.9226.9226.8626.8726.87-0.24%1,325
Mar 26, 202626.9626.9626.9426.9426.94-0.42%326
Mar 25, 202627.0527.0527.0527.0527.050.13%67
Mar 24, 202627.0427.0427.0227.0227.02-0.13%224
Mar 23, 202627.0727.0727.0127.0527.050.26%545
Mar 20, 202626.9727.0026.9726.9826.98-0.26%2,536
Mar 19, 202627.0127.0527.0127.0527.05-0.07%4,507
Mar 18, 202627.0727.0727.0727.0727.07-0.24%400
Mar 17, 202627.1027.1427.1027.1427.130.05%3,444