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Calamos S&P 500 Structured Alt Protection ETF - October (CPSO)
NYSEARCA: CPSO · Real-Time Price · USD
27.52
+0.01 (0.04%)
At close: Apr 28, 2026, 4:00 PM EDT
27.52
0.00 (0.00%)
After-hours: Apr 28, 2026, 8:00 PM EDT

CPSO Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
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, 202626.9626.9626.9426.9426.94-0.43%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, 202627.1027.1427.1027.1427.130.06%3,444
Mar 16, 202627.1227.1227.1227.1227.120.21%24
Mar 13, 202627.0427.0627.0427.0627.06-0.10%400
Mar 12, 202627.1527.1527.0927.0927.09-0.29%150
Mar 11, 202627.1227.1727.1227.1727.17-0.02%159
Mar 10, 202627.1727.1827.1727.1827.18-0.02%168
Mar 9, 202627.0727.1827.0727.1827.180.11%1,762
Mar 6, 202627.1327.1527.1327.1527.15-0.08%1,132
Mar 5, 202627.2427.2427.1327.1827.18-0.19%1,441
Mar 4, 202627.2627.2627.2327.2327.230.16%260
Mar 3, 202627.1727.2227.1727.1827.18-0.17%820
Mar 2, 202627.1727.2527.1727.2327.230.03%2,014
Feb 27, 202627.2327.2427.2227.2227.22-0.06%2,162
Feb 26, 202627.1927.2427.1927.2427.24-0.08%1,305
Feb 25, 202627.2327.2627.2327.2627.260.15%1,693
Feb 24, 202627.2227.2227.1927.2227.220.24%1,252
Feb 23, 202627.1727.1727.1627.1627.16-0.28%526
Feb 20, 202627.2327.2327.2327.2327.230.15%220
Feb 19, 202627.1927.1927.1927.1927.19-0.06%150
Feb 18, 202627.1827.2427.1727.2127.210.13%5,510
Feb 17, 202627.2127.2227.1227.1727.170.02%4,746
Feb 13, 202627.1727.1727.1727.1727.170.03%453
Feb 12, 202627.1627.1627.1627.1627.16-0.26%473
Feb 11, 202627.2527.2727.2327.2327.23-0.01%4,959
Feb 10, 202627.2327.2327.2327.2327.23-0.03%969
Feb 9, 202627.2727.2827.2427.2427.240.07%2,641
Feb 6, 202627.1927.2227.1927.2227.220.39%1,597
Feb 5, 202627.1027.1527.1027.1227.12-0.14%2,781
Feb 4, 202627.1427.2027.1227.1527.15-0.11%2,864
Feb 3, 202627.1727.1927.1427.1927.19-0.06%832
Feb 2, 202627.1927.2527.1927.2027.200.02%681
Jan 30, 202627.2027.2027.2027.2027.20-0.03%50
Jan 29, 202627.1227.2127.1227.2027.20-0.11%6,110
Jan 28, 202627.2527.2527.2127.2327.230.05%1,538
Jan 27, 202627.1727.2227.1727.2227.220.17%3,864
Jan 26, 202627.1527.1827.1527.1827.18-3,161
Jan 23, 202627.1627.2127.1627.1827.180.04%1,145
Jan 22, 202627.1327.1727.1227.1727.170.09%11,359
Jan 21, 202627.1427.1427.1427.1427.140.18%8
Jan 20, 202627.1627.1627.0927.0927.09-0.26%300
Jan 16, 202627.1527.1827.1527.1627.160.02%679
Jan 15, 202627.1527.1627.1527.1627.160.13%3,555
Jan 14, 202627.1427.2027.1227.1227.12-0.17%28,804
Jan 13, 202627.1727.1727.1727.1727.160.02%1,189
Jan 12, 202627.1527.1627.1527.1627.160.04%991
Jan 9, 202627.1527.1527.1527.1527.150.09%-
Jan 8, 202627.1027.1327.1027.1327.130.02%1,482
Jan 7, 202627.1227.1227.1227.1227.12-0.04%354
Jan 6, 202627.1327.1327.1127.1327.130.11%2,519
Jan 5, 202627.1027.1027.1027.1027.100.11%86
Jan 2, 202627.0627.0827.0627.0727.070.02%562
Dec 31, 202527.0627.0627.0627.0627.06-0.10%36
Dec 30, 202527.0927.0927.0927.0927.09-0.01%138
Dec 29, 202527.1027.1027.0927.0927.09-0.05%289
Dec 26, 202527.1127.1127.1127.1127.110.06%37
Dec 24, 202527.0927.0927.0927.0927.090.07%10
Dec 23, 202527.0527.0727.0527.0727.070.07%400
Dec 22, 202527.0527.0527.0527.0527.050.11%6
Dec 19, 202527.0227.0227.0227.0227.020.15%91
Dec 18, 202526.9826.9826.9826.9826.98-44
Dec 17, 202526.9826.9826.9826.9826.98-0.04%4,954
Dec 16, 202527.0027.0026.9926.9926.99-0.07%3,417
Dec 15, 202527.0127.0126.9827.0127.010.09%2,784
Dec 12, 202527.0027.0026.9926.9926.99-0.20%104
Dec 11, 202527.0427.0427.0427.0427.040.06%2
Dec 10, 202527.0227.0327.0227.0327.020.04%1,622
Dec 9, 202527.0327.0327.0027.0227.020.15%2,459
Dec 8, 202527.0127.0226.9826.9826.98-0.09%1,149
Dec 5, 202527.0127.0526.9827.0027.000.08%2,102
Dec 4, 202526.9827.0026.9526.9826.98-0.04%2,732
Dec 3, 202526.9926.9926.9926.9926.990.15%-