Calamos S&P 500 Structured Alt Protection ETF - September (CPST)

NYSEARCA: CPST · Real-Time Price · USD

28.05

0.00 (0.01%)

At close: Aug 17, 2026, 4:00 PM EDT

28.05

0.00 (0.00%)

After-hours: Aug 17, 2026, 4:10 PM EDT

CPST Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Aug 14, 2026	28.04	28.04	28.04	28.04	28.04	0.01%	17
Aug 13, 2026	28.04	28.04	28.04	28.04	28.04	0.07%	28
Aug 12, 2026	28.04	28.04	28.00	28.02	28.02	0.04%	5,844
Aug 11, 2026	28.00	28.02	27.99	28.01	28.01	-	3,451
Aug 10, 2026	28.01	28.01	27.99	28.01	28.01	-0.05%	771
Aug 7, 2026	28.03	28.03	28.03	28.03	28.03	0.03%	37
Aug 6, 2026	27.99	28.02	27.99	28.02	28.02	0.04%	3,632
Aug 5, 2026	27.98	28.01	27.98	28.01	28.01	-	4,560
Aug 4, 2026	27.98	28.01	27.97	28.01	28.01	0.04%	926
Aug 3, 2026	27.97	28.00	27.97	28.00	28.00	0.07%	3,851
Jul 31, 2026	27.93	27.98	27.93	27.98	27.98	0.16%	813
Jul 30, 2026	27.92	27.93	27.91	27.93	27.93	0.13%	5,457
Jul 29, 2026	27.89	27.92	27.86	27.90	27.90	-0.13%	1,593
Jul 28, 2026	27.93	27.93	27.93	27.93	27.93	0.07%	13
Jul 27, 2026	27.90	27.91	27.88	27.91	27.91	0.02%	14,719
Jul 24, 2026	27.91	27.91	27.88	27.91	27.91	0.05%	1,503
Jul 23, 2026	27.92	27.92	27.89	27.89	27.89	-0.11%	218
Jul 22, 2026	27.90	27.92	27.90	27.92	27.92	0.02%	1,497
Jul 21, 2026	27.92	27.92	27.92	27.92	27.92	0.07%	8
Jul 20, 2026	27.89	27.93	27.89	27.90	27.90	0.02%	1,409
Jul 17, 2026	27.87	27.89	27.87	27.89	27.89	-0.05%	426
Jul 16, 2026	27.93	27.93	27.91	27.91	27.91	-0.02%	455
Jul 15, 2026	27.93	27.93	27.91	27.91	27.91	0.02%	255
Jul 14, 2026	27.88	27.93	27.88	27.91	27.91	0.05%	1,929
Jul 13, 2026	27.89	27.89	27.89	27.89	27.89	-0.04%	7
Jul 10, 2026	27.90	27.90	27.90	27.90	27.90	0.11%	42
Jul 9, 2026	27.88	27.88	27.87	27.87	27.87	0.04%	234
Jul 8, 2026	27.86	27.86	27.86	27.86	27.86	-	59
Jul 7, 2026	27.86	27.86	27.86	27.86	27.86	0.02%	74
Jul 6, 2026	27.78	27.86	27.78	27.86	27.86	0.11%	2,108
Jul 2, 2026	27.83	27.83	27.83	27.83	27.83	-0.02%	9
Jul 1, 2026	27.83	27.83	27.83	27.83	27.83	0.07%	7
Jun 30, 2026	27.81	27.81	27.77	27.81	27.81	0.07%	1,222
Jun 29, 2026	27.78	27.82	27.78	27.79	27.79	0.11%	2,717
Jun 26, 2026	27.76	27.76	27.76	27.76	27.76	0.11%	89
Jun 25, 2026	27.74	27.74	27.72	27.73	27.73	-0.07%	5,359
Jun 24, 2026	27.75	27.75	27.75	27.75	27.75	-	130
Jun 23, 2026	27.75	27.75	27.75	27.75	27.75	-0.14%	169
Jun 22, 2026	27.76	27.79	27.76	27.79	27.79	0.10%	144
Jun 18, 2026	27.81	27.81	27.75	27.76	27.76	0.06%	1,181
Jun 17, 2026	27.78	27.78	27.75	27.75	27.75	-0.14%	227
Jun 16, 2026	27.75	27.83	27.75	27.79	27.79	0.05%	2,271
Jun 15, 2026	27.77	27.77	27.77	27.77	27.77	0.13%	352
Jun 12, 2026	27.76	27.76	27.74	27.74	27.74	0.07%	155
Jun 11, 2026	27.74	27.74	27.67	27.72	27.72	0.20%	2,265
Jun 10, 2026	27.66	27.70	27.62	27.66	27.66	-0.14%	11,010
Jun 9, 2026	27.70	27.70	27.70	27.70	27.70	-0.07%	34
Jun 8, 2026	27.69	27.72	27.69	27.72	27.72	0.07%	317
Jun 5, 2026	27.72	27.75	27.70	27.70	27.70	-0.18%	1,348
Jun 4, 2026	27.75	27.75	27.75	27.75	27.75	0.02%	3