Calamos S&P 500 Structured Alt Protection ETF - October (CPSO)

NYSEARCA: CPSO · Real-Time Price · USD

28.15

+0.01 (0.03%)

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

28.15

0.00 (0.00%)

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

CPSO Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Aug 17, 2026	28.13	28.14	28.12	28.14	-	-	98
Aug 14, 2026	28.14	28.14	28.14	28.14	28.14	0.04%	7
Aug 13, 2026	28.13	28.13	28.13	28.13	28.13	-0.03%	10
Aug 12, 2026	28.17	28.17	28.10	28.14	28.14	0.12%	1,523
Aug 11, 2026	28.11	28.11	28.11	28.11	28.11	-0.05%	337
Aug 10, 2026	28.13	28.13	28.12	28.12	28.12	-0.02%	107
Aug 7, 2026	28.12	28.13	28.09	28.13	28.13	0.09%	3,409
Aug 6, 2026	28.10	28.10	28.10	28.10	28.10	-	7
Aug 5, 2026	28.14	28.15	28.10	28.10	28.10	0.04%	5,559
Aug 4, 2026	28.13	28.13	28.09	28.09	28.09	0.11%	4,318
Aug 3, 2026	28.04	28.06	28.04	28.06	28.06	0.12%	506
Jul 31, 2026	27.98	28.03	27.98	28.03	28.03	0.17%	2,701
Jul 30, 2026	27.98	27.98	27.86	27.98	27.98	0.42%	5,668
Jul 29, 2026	27.94	27.96	27.86	27.86	27.86	-0.36%	4,088
Jul 28, 2026	27.97	27.97	27.97	27.97	27.97	0.13%	563
Jul 27, 2026	27.93	27.93	27.93	27.93	27.93	0.05%	63
Jul 24, 2026	27.92	27.92	27.92	27.92	27.92	0.07%	6
Jul 23, 2026	27.90	27.90	27.90	27.90	27.90	-0.23%	96
Jul 22, 2026	27.97	27.97	27.94	27.96	27.96	0.02%	12,099
Jul 21, 2026	27.95	27.95	27.95	27.95	27.95	0.12%	130
Jul 20, 2026	27.95	27.95	27.92	27.92	27.92	-	1,345
Jul 17, 2026	27.92	27.92	27.92	27.92	27.92	-0.09%	76
Jul 16, 2026	27.98	27.98	27.95	27.95	27.95	-0.04%	402
Jul 15, 2026	27.96	27.96	27.96	27.96	27.96	0.05%	32
Jul 14, 2026	27.93	27.94	27.93	27.94	27.94	0.04%	1,577
Jul 13, 2026	27.94	27.94	27.93	27.93	27.93	-0.11%	190
Jul 10, 2026	27.96	27.96	27.96	27.96	27.96	0.07%	42
Jul 9, 2026	27.88	27.94	27.88	27.94	27.94	0.19%	1,138
Jul 8, 2026	27.86	27.89	27.86	27.89	27.89	-0.01%	212
Jul 7, 2026	27.90	27.91	27.89	27.89	27.89	-0.02%	1,106
Jul 6, 2026	27.90	27.92	27.90	27.90	27.90	0.13%	1,444
Jul 2, 2026	27.86	27.86	27.86	27.86	27.86	0.03%	7
Jul 1, 2026	27.85	27.85	27.85	27.85	27.85	0.04%	7
Jun 30, 2026	27.84	27.84	27.84	27.84	27.84	0.14%	7
Jun 29, 2026	27.82	27.82	27.80	27.80	27.80	0.11%	191
Jun 26, 2026	27.77	27.77	27.77	27.77	27.77	0.06%	122
Jun 25, 2026	27.75	27.75	27.75	27.75	27.75	-0.04%	-
Jun 24, 2026	27.77	27.77	27.77	27.77	27.77	-0.03%	9
Jun 23, 2026	27.77	27.77	27.77	27.77	27.77	-0.18%	-
Jun 22, 2026	27.83	27.83	27.83	27.83	27.83	-0.04%	3
Jun 18, 2026	27.86	27.86	27.80	27.84	27.84	0.20%	2,738
Jun 17, 2026	27.86	27.86	27.78	27.78	27.78	-0.18%	1,624
Jun 16, 2026	27.83	27.83	27.83	27.83	27.83	-0.02%	72
Jun 15, 2026	27.80	27.84	27.80	27.84	27.84	0.24%	1,001
Jun 12, 2026	27.78	27.80	27.77	27.77	27.77	0.09%	207
Jun 11, 2026	27.72	27.75	27.72	27.75	27.75	0.22%	164
Jun 10, 2026	27.69	27.69	27.69	27.69	27.68	-0.18%	27
Jun 9, 2026	27.73	27.73	27.73	27.73	27.73	-0.04%	25
Jun 8, 2026	27.75	27.75	27.75	27.75	27.75	0.04%	30
Jun 5, 2026	27.77	27.77	27.74	27.74	27.74	-0.25%	324