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

CPST Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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
Jun 3, 2026	27.75	27.75	27.75	27.75	27.75	-	846
Jun 2, 2026	27.74	27.75	27.74	27.75	27.75	0.07%	281
Jun 1, 2026	27.73	27.73	27.73	27.73	27.73	0.01%	112
May 29, 2026	27.72	27.72	27.72	27.72	27.72	0.03%	6
May 28, 2026	27.68	27.72	27.68	27.72	27.72	0.04%	1,106
May 27, 2026	27.70	27.70	27.70	27.70	27.70	0.02%	111
May 26, 2026	27.70	27.70	27.70	27.70	27.70	0.13%	66
May 22, 2026	27.67	27.67	27.67	27.67	27.67	-0.01%	224
May 21, 2026	27.67	27.67	27.67	27.67	27.67	0.08%	42
May 20, 2026	27.61	27.65	27.61	27.65	27.64	0.05%	738
May 19, 2026	27.66	27.66	27.63	27.63	27.63	-	808
May 18, 2026	27.61	27.63	27.60	27.63	27.63	-0.03%	5,491
May 15, 2026	27.61	27.64	27.61	27.64	27.64	-0.08%	732
May 14, 2026	27.66	27.66	27.66	27.66	27.66	0.09%	266
May 13, 2026	27.64	27.64	27.64	27.64	27.64	0.06%	94
May 12, 2026	27.57	27.62	27.56	27.62	27.62	0.11%	830
May 11, 2026	27.07	27.60	27.07	27.59	27.59	0.02%	7,619
May 8, 2026	27.57	27.59	27.57	27.59	27.59	0.09%	360
May 7, 2026	27.56	27.56	27.56	27.56	27.56	-0.09%	11,120
May 6, 2026	27.56	27.59	27.56	27.59	27.59	0.16%	955
May 5, 2026	27.52	27.54	27.51	27.54	27.54	0.13%	1,298
May 4, 2026	27.51	27.51	27.51	27.51	27.50	-0.05%	1,034
May 1, 2026	27.53	27.54	27.51	27.52	27.52	0.02%	12,634
Apr 30, 2026	27.47	27.52	27.47	27.52	27.52	0.20%	211
Apr 29, 2026	27.50	27.53	27.44	27.46	27.46	-0.05%	2,506
Apr 28, 2026	27.48	27.48	27.48	27.48	27.48	0.04%	283
Apr 27, 2026	27.47	27.47	27.47	27.47	27.47	-0.02%	-
Apr 24, 2026	27.47	27.47	27.47	27.47	27.47	0.18%	1
Apr 23, 2026	27.42	27.42	27.42	27.42	27.42	-0.09%	200
Apr 22, 2026	27.43	27.45	27.43	27.45	27.45	0.02%	1,100
Apr 21, 2026	27.44	27.44	27.44	27.44	27.44	-0.05%	1
Apr 20, 2026	27.46	27.46	27.46	27.46	27.46	-0.04%	-
Apr 17, 2026	27.40	27.47	27.40	27.47	27.46	0.31%	2,040
Apr 16, 2026	27.36	27.40	27.36	27.38	27.38	-	2,753
Apr 15, 2026	27.38	27.38	27.38	27.38	27.38	0.09%	5
Apr 14, 2026	27.36	27.36	27.36	27.36	27.36	0.20%	75
Apr 13, 2026	27.30	27.30	27.30	27.30	27.30	0.13%	80
Apr 10, 2026	27.23	27.27	27.23	27.27	27.27	0.09%	751
Apr 9, 2026	27.24	27.24	27.24	27.24	27.24	0.11%	1,481
Apr 8, 2026	27.20	27.21	27.19	27.21	27.21	0.57%	393

Data Source: S&P Global Market Intelligence Last updated: Jun 17, 2026

Historical price data is provided by S&P Global Market Intelligence. New prices are added after the close of each trading day, and past prices are adjusted for stock splits.

Update frequency:

Daily

Last checked:

Jun 17, 2026

Data Sources Report a data error

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