Calamos S&P 500 Structured Alt Protection ETF - October (CPSO)
NYSEARCA: CPSO · Real-Time Price · USD
27.78
+0.02 (0.06%)
At close: May 28, 2026, 4:00 PM EDT
27.78
0.00 (0.00%)
After-hours: May 28, 2026, 4:10 PM EDT
CPSO Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| May 27, 2026 | 27.77 | 27.77 | 27.73 | 27.76 | 27.76 | 0.03% | 409 |
| May 26, 2026 | 27.76 | 27.76 | 27.76 | 27.76 | 27.76 | 0.13% | - |
| May 22, 2026 | 27.73 | 27.74 | 27.72 | 27.72 | 27.72 | 0.03% | 6,323 |
| May 21, 2026 | 27.70 | 27.71 | 27.70 | 27.71 | 27.71 | 0.06% | 182 |
| May 20, 2026 | 27.70 | 27.70 | 27.70 | 27.70 | 27.69 | 0.11% | 117 |
| May 19, 2026 | 27.63 | 27.67 | 27.63 | 27.67 | 27.67 | -0.04% | 287 |
| May 18, 2026 | 27.65 | 27.68 | 27.64 | 27.68 | 27.68 | 0.02% | 230 |
| May 15, 2026 | 27.65 | 27.67 | 27.65 | 27.67 | 27.67 | -0.11% | 1,025 |
| May 14, 2026 | 27.70 | 27.70 | 27.70 | 27.70 | 27.70 | 0.08% | 622 |
| May 13, 2026 | 27.68 | 27.68 | 27.68 | 27.68 | 27.68 | 0.03% | 424 |
| May 12, 2026 | 27.65 | 27.67 | 27.65 | 27.67 | 27.67 | 0.09% | 1,184 |
| May 11, 2026 | 27.64 | 27.65 | 27.64 | 27.65 | 27.65 | 0.02% | 795 |
| May 8, 2026 | 27.64 | 27.64 | 27.64 | 27.64 | 27.64 | 0.11% | 8 |
| May 7, 2026 | 27.61 | 27.61 | 27.61 | 27.61 | 27.61 | -0.07% | 79 |
| May 6, 2026 | 27.63 | 27.63 | 27.63 | 27.63 | 27.63 | 0.13% | 623 |
| May 5, 2026 | 27.55 | 27.60 | 27.55 | 27.60 | 27.60 | 0.22% | 1,869 |
| May 4, 2026 | 27.56 | 27.56 | 27.54 | 27.54 | 27.54 | -0.16% | 1,086 |
| May 1, 2026 | 27.56 | 27.58 | 27.56 | 27.58 | 27.58 | 0.05% | 2,422 |
| Apr 30, 2026 | 27.50 | 27.57 | 27.50 | 27.57 | 27.57 | 0.27% | 429 |
| Apr 29, 2026 | 27.48 | 27.50 | 27.48 | 27.49 | 27.49 | -0.09% | 11,499 |
| Apr 28, 2026 | 27.47 | 27.52 | 27.47 | 27.52 | 27.52 | 0.04% | 228 |
| Apr 27, 2026 | 27.51 | 27.51 | 27.51 | 27.51 | 27.51 | -0.07% | - |
| Apr 24, 2026 | 27.52 | 27.52 | 27.52 | 27.52 | 27.52 | 0.24% | 107 |
| Apr 23, 2026 | 27.46 | 27.46 | 27.46 | 27.46 | 27.46 | -0.12% | 88 |
| Apr 22, 2026 | 27.47 | 27.49 | 27.46 | 27.49 | 27.49 | 0.15% | 1,667 |
| Apr 21, 2026 | 27.49 | 27.49 | 27.45 | 27.45 | 27.45 | -0.09% | 5,915 |
| Apr 20, 2026 | 27.44 | 27.48 | 27.44 | 27.48 | 27.48 | -0.05% | 1,580 |
| Apr 17, 2026 | 27.46 | 27.49 | 27.45 | 27.49 | 27.49 | 0.27% | 821 |
| Apr 16, 2026 | 27.42 | 27.42 | 27.42 | 27.42 | 27.42 | 0.02% | 66 |
| Apr 15, 2026 | 27.41 | 27.41 | 27.41 | 27.41 | 27.41 | 0.13% | 2 |
| Apr 14, 2026 | 27.38 | 27.38 | 27.38 | 27.38 | 27.38 | 0.26% | 156 |
| Apr 13, 2026 | 27.26 | 27.33 | 27.26 | 27.31 | 27.31 | 0.15% | 494 |
| Apr 10, 2026 | 27.27 | 27.27 | 27.27 | 27.27 | 27.27 | - | 5 |
| Apr 9, 2026 | 27.27 | 27.27 | 27.27 | 27.27 | 27.27 | 0.16% | 60 |
| Apr 8, 2026 | 27.18 | 27.22 | 27.18 | 27.22 | 27.22 | 0.58% | 3,086 |
| Apr 7, 2026 | 27.06 | 27.06 | 27.06 | 27.06 | 27.06 | -0.02% | - |
| Apr 6, 2026 | 27.08 | 27.08 | 27.07 | 27.07 | 27.07 | 0.04% | 370 |
| Apr 2, 2026 | 27.05 | 27.06 | 27.02 | 27.06 | 27.06 | 0.04% | 2,450 |
| Apr 1, 2026 | 27.10 | 27.10 | 27.05 | 27.05 | 27.05 | 0.17% | 1,076 |
| Mar 31, 2026 | 26.94 | 27.00 | 26.94 | 27.00 | 27.00 | 0.52% | 100 |
| Mar 30, 2026 | 26.85 | 26.87 | 26.85 | 26.87 | 26.86 | -0.02% | 268 |
| Mar 27, 2026 | 26.92 | 26.92 | 26.86 | 26.87 | 26.87 | -0.24% | 1,325 |
| Mar 26, 2026 | 26.96 | 26.96 | 26.94 | 26.94 | 26.94 | -0.42% | 326 |
| Mar 25, 2026 | 27.05 | 27.05 | 27.05 | 27.05 | 27.05 | 0.13% | 67 |
| Mar 24, 2026 | 27.04 | 27.04 | 27.02 | 27.02 | 27.02 | -0.13% | 224 |
| Mar 23, 2026 | 27.07 | 27.07 | 27.01 | 27.05 | 27.05 | 0.26% | 545 |
| Mar 20, 2026 | 26.97 | 27.00 | 26.97 | 26.98 | 26.98 | -0.26% | 2,536 |
| Mar 19, 2026 | 27.01 | 27.05 | 27.01 | 27.05 | 27.05 | -0.07% | 4,507 |
| Mar 18, 2026 | 27.07 | 27.07 | 27.07 | 27.07 | 27.07 | -0.24% | 400 |
| Mar 17, 2026 | 27.10 | 27.14 | 27.10 | 27.14 | 27.13 | 0.05% | 3,444 |