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Calamos S&P 500 Structured Alt Protection ETF - September (CPST)
NYSEARCA: CPST · Real-Time Price · USD
27.48
+0.01 (0.04%)
At close: Apr 28, 2026, 4:00 PM EDT
27.48
0.00 (0.00%)
After-hours: Apr 28, 2026, 6:30 PM EDT

CPST Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Apr 28, 202627.4827.4827.4827.48-0.04%283
Apr 27, 202627.4727.4727.4727.4727.47-0.02%-
Apr 24, 202627.4727.4727.4727.4727.470.18%1
Apr 23, 202627.4227.4227.4227.4227.42-0.09%200
Apr 22, 202627.4327.4527.4327.4527.450.02%1,100
Apr 21, 202627.4427.4427.4427.4427.44-0.05%1
Apr 20, 202627.4627.4627.4627.4627.46-0.04%-
Apr 17, 202627.4027.4727.4027.4727.460.31%2,040
Apr 16, 202627.3627.4027.3627.3827.38-2,753
Apr 15, 202627.3827.3827.3827.3827.380.09%5
Apr 14, 202627.3627.3627.3627.3627.360.20%75
Apr 13, 202627.3027.3027.3027.3027.300.13%80
Apr 10, 202627.2327.2727.2327.2727.270.09%751
Apr 9, 202627.2427.2427.2427.2427.240.11%1,481
Apr 8, 202627.2027.2127.1927.2127.210.57%393
Apr 7, 202627.0527.0627.0227.0627.05-0.09%603
Apr 6, 202627.1027.1027.0327.0827.080.11%3,300
Apr 2, 202627.0127.0527.0127.0527.050.02%612
Apr 1, 202627.0527.0527.0527.0527.050.26%119
Mar 31, 202626.8727.0226.8726.9826.980.54%1,117
Mar 30, 202626.8526.8526.7926.8326.83-0.15%557
Mar 27, 202626.8826.8826.8426.8726.87-0.20%415
Mar 26, 202626.9626.9626.9326.9326.93-0.43%2,188
Mar 25, 202627.0327.0827.0327.0427.040.19%2,365
Mar 24, 202626.9927.0126.9926.9926.99-0.12%973
Mar 23, 202627.0227.0227.0227.0227.020.22%102
Mar 20, 202626.9626.9626.9626.9626.96-0.26%102
Mar 19, 202627.0027.0427.0027.0427.03-0.13%642
Mar 18, 202627.0627.0727.0627.0727.07-0.21%171
Mar 17, 202627.1327.1327.1327.1327.130.07%-
Mar 16, 202627.0727.1127.0727.1127.110.20%631
Mar 13, 202627.0527.0627.0527.0527.05-0.11%2,222
Mar 12, 202627.0527.0827.0527.0827.08-0.24%200
Mar 11, 202627.1227.1527.1127.1527.15-0.02%1,547
Mar 10, 202627.1027.1827.1027.1527.150.03%11,376
Mar 9, 202627.0527.1427.0527.1427.140.07%3,112
Mar 6, 202627.1027.1227.0927.1227.12-0.10%2,799
Mar 5, 202627.1427.1527.1127.1527.15-0.15%6,363
Mar 4, 202627.1927.1927.1627.1927.190.08%1,560
Mar 3, 202627.1727.1727.1727.1727.17-0.08%90
Mar 2, 202627.1327.2027.1327.1927.190.01%9,150
Feb 27, 202627.1927.1927.1927.1927.19-0.02%198
Feb 26, 202627.1727.1927.1627.1927.19-0.09%2,426
Feb 25, 202627.2127.2227.2127.2227.220.13%779
Feb 24, 202627.1127.1827.1127.1827.180.24%6,342
Feb 23, 202627.1227.1227.1127.1127.11-0.21%2,909
Feb 20, 202627.1827.1827.1527.1727.170.09%4,008
Feb 19, 202627.1327.1527.1327.1527.15-0.07%332
Feb 18, 202627.1527.1927.1527.1727.170.10%1,628
Feb 17, 202627.1427.1427.1427.1427.140.01%342
Feb 13, 202627.0727.1427.0727.1427.140.05%1,204
Feb 12, 202627.1527.1527.1227.1227.12-0.23%567
Feb 11, 202627.1727.1927.1527.1927.18-0.01%1,640
Feb 10, 202627.1727.2127.1627.1927.19-0.03%11,300
Feb 9, 202627.2127.2427.1727.2027.200.07%4,750
Feb 6, 202627.0927.1927.0927.1827.180.35%2,573
Feb 5, 202627.0827.1327.0427.0827.08-0.10%10,176
Feb 4, 202627.1727.1727.0827.1127.11-0.14%4,447
Feb 3, 202627.1327.1527.1027.1527.15-0.04%1,021
Feb 2, 202627.1427.1627.1427.1627.160.02%907
Jan 30, 202627.1527.1527.1527.1527.15-0.04%58
Jan 29, 202627.1627.1627.1627.1627.16-0.07%207
Jan 28, 202627.1827.2127.1327.1827.180.01%9,460
Jan 27, 202627.1227.1827.1227.1827.180.15%2,361
Jan 26, 202627.1027.1427.1027.1427.14-0.02%877
Jan 23, 202627.1027.1427.1027.1427.140.06%661
Jan 22, 202627.1527.1627.0827.1327.130.09%1,876
Jan 21, 202627.0527.1027.0527.1027.100.19%391
Jan 20, 202627.0527.0527.0127.0527.05-0.24%6,382
Jan 16, 202627.1227.1227.1227.1227.120.04%177
Jan 15, 202627.1127.1127.0927.1127.110.07%550
Jan 14, 202627.0927.1227.0727.0927.09-0.22%3,542
Jan 13, 202627.1027.1527.1027.1527.150.11%1,234
Jan 12, 202627.1027.1527.1027.1227.120.02%1,435
Jan 9, 202627.1127.1127.1127.1127.110.09%1
Jan 8, 202627.0727.0927.0627.0927.090.04%1,767
Jan 7, 202627.0827.0827.0627.0827.08-0.04%901
Jan 6, 202627.0727.0927.0727.0927.090.07%2,278
Jan 5, 202627.0527.0727.0527.0727.070.09%1,094
Jan 2, 202627.0327.0727.0327.0427.040.06%644
Dec 31, 202527.0227.0227.0227.0227.02-0.08%209
Dec 30, 202527.0527.0727.0427.0527.05-0.09%1,813
Dec 29, 202527.0427.0727.0427.0727.07-0.02%226
Dec 26, 202527.0527.0827.0427.0827.080.04%7,718
Dec 24, 202527.0727.0727.0727.0727.070.15%-
Dec 23, 202527.0327.0327.0027.0327.03-0.04%846
Dec 22, 202527.0427.0427.0427.0427.040.04%220
Dec 19, 202527.0327.0327.0327.0327.030.26%-
Dec 18, 202526.9926.9926.9626.9626.960.06%1,311
Dec 17, 202526.9526.9926.9426.9426.94-0.09%1,227
Dec 16, 202526.9726.9726.9626.9726.97-0.06%650
Dec 15, 202527.0027.0026.9826.9826.98-2,418
Dec 12, 202526.9926.9926.9826.9826.98-0.02%465
Dec 11, 202527.0127.0126.9526.9926.990.02%1,701
Dec 10, 202526.9927.0026.9726.9826.980.11%1,325
Dec 9, 202526.9526.9526.9526.9526.950.11%179
Dec 8, 202526.9226.9626.9126.9226.92-0.13%5,442
Dec 5, 202526.9726.9726.9326.9626.960.19%1,300
Dec 4, 202526.9126.9126.9126.9126.91-0.13%1,108
Dec 3, 202526.9126.9426.9026.9426.940.21%4,744