Stock listing
NYSE Arca:CPST Calamos S&P 500 Structured Alt Protection ETF - September Stock
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Share price · AMEX:CPST
$28.19 USD +0.00 (+0.0%)
Close on Oct 20, 2026
- Day range
- $28.12 – $28.23 USDOct 20, 2026
- Volume
- 2,257 sharesOct 20, 2026
Daily closes
Last 3 months, Jul 20, 2026 – Oct 20, 2026 · AMEX:CPST · USD, adjusted for splits
| Day | Close | Change | % | Open | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| $28.19 | +0.005 | 0.0% | $28.14 | $28.23 | $28.12 | 2,257 | |
| $28.18 | +0.049 | +0.2% | $28.18 | $28.22 | $28.18 | 1,323 | |
| $28.13 | -0.074 | -0.3% | $28.18 | $28.18 | $28.12 | 4,266 | |
| $28.21 | +0.025 | +0.1% | $28.22 | $28.24 | $28.21 | 874 | |
| $28.18 | -0.05 | -0.2% | $28.24 | $28.24 | $28.18 | 4,884 | |
| $28.23 | -0.01 | 0.0% | $28.23 | $28.23 | $28.23 | 7 | |
| $28.24 | -0.007 | 0.0% | $28.25 | $28.28 | $28.22 | 3,586 | |
| $28.25 | +0.033 | +0.1% | $28.27 | $28.27 | $28.22 | 1,100 | |
| $28.21 | -0.021 | -0.1% | $28.25 | $28.25 | $28.21 | 1,200 | |
| $28.24 | -0.005 | 0.0% | $28.30 | $28.30 | $28.18 | 26,900 | |
| $28.24 | +0.052 | +0.2% | $28.24 | $28.24 | $28.24 | 800 | |
| $28.19 | +0.018 | +0.1% | $28.18 | $28.20 | $28.18 | 2,000 | |
| $28.17 | +0.03 | +0.1% | $28.18 | $28.18 | $28.15 | 2,100 | |
| $28.14 | +0.03 | +0.1% | $28.11 | $28.14 | $28.08 | 102,800 | |
| $28.11 | +0.025 | +0.1% | $28.13 | $28.14 | $28.09 | 6,200 | |
| $28.09 | +0.005 | 0.0% | $28.08 | $28.10 | $28.08 | 4,300 | |
| $28.08 | -0.06 | -0.2% | $28.08 | $28.08 | $28.08 | 100 | |
| $28.14 | +0.046 | +0.2% | $28.11 | $28.16 | $28.11 | 2,800 | |
| $28.09 | -0.03 | -0.1% | $28.10 | $28.14 | $28.09 | 4,300 | |
| $28.12 | -0.013 | 0.0% | $28.08 | $28.14 | $28.08 | 32,300 | |
| $28.14 | +0.017 | +0.1% | $28.06 | $28.18 | $28.06 | 4,792 | |
| $28.12 | +0.059 | +0.2% | $28.08 | $28.14 | $28.08 | 1,370 | |
| $28.06 | -0.004 | 0.0% | $28.06 | $28.06 | $28.05 | 700 | |
| $28.07 | +0.096 | +0.3% | $28.03 | $28.07 | $28.02 | 10,900 | |
| $27.97 | -0.042 | -0.1% | $28.03 | $28.05 | $27.92 | 7,200 | |
| $28.01 | -0.016 | -0.1% | $28.22 | $28.22 | $28.01 | 10,000 | |
| $28.03 | -0.033 | -0.1% | $28.04 | $28.15 | $28.03 | 5,000 | |
| $28.06 | +0.05 | +0.2% | $28.09 | $28.11 | $28.06 | 8,900 | |
| $28.01 | -0.058 | -0.2% | $27.99 | $28.05 | $27.99 | 6,900 | |
| $28.07 | -0.048 | -0.2% | $28.10 | $28.10 | $28.03 | 9,900 | |
| $28.12 | -0.015 | -0.1% | $28.20 | $28.26 | $28.09 | 18,000 | |
| $28.13 | -0.046 | -0.2% | $28.18 | $28.18 | $28.11 | 13,400 | |
| $28.18 | +0.082 | +0.3% | $28.14 | $28.25 | $28.11 | 24,600 | |
| $28.10 | +0.023 | +0.1% | $28.09 | $28.11 | $28.04 | 25,900 | |
| $28.07 | -0.054 | -0.2% | $28.00 | $28.10 | $27.98 | 102,600 | |
| $28.13 | +0.026 | +0.1% | $28.13 | $28.13 | $28.07 | 7,200 | |
| $28.10 | +0.014 | 0.0% | $28.10 | $28.13 | $28.07 | 5,400 | |
| $28.09 | +0.006 | 0.0% | $28.10 | $28.10 | $28.09 | 500 | |
| $28.08 | +0.01 | 0.0% | $28.08 | $28.08 | $28.08 | 88 | |
| $28.07 | +0.015 | +0.1% | $28.08 | $28.12 | $28.07 | 1,700 | |
| $28.06 | 0.00 | 0.0% | $28.06 | $28.06 | $28.06 | 100 | |
| $28.06 | +0.005 | 0.0% | $28.08 | $28.08 | $28.06 | 100 | |
| $28.05 | +0.01 | 0.0% | $28.05 | $28.05 | $28.05 | 100 | |
| $28.04 | -0.01 | 0.0% | $28.03 | $28.04 | $28.03 | 600 | |
| $28.05 | +0.005 | 0.0% | $28.08 | $28.08 | $28.02 | 776 | |
| $28.05 | +0.002 | 0.0% | $28.01 | $28.07 | $28.01 | 517 | |
| $28.04 | +0.003 | 0.0% | $28.04 | $28.04 | $28.04 | 100 | |
| $28.04 | +0.02 | +0.1% | $28.04 | $28.04 | $28.04 | 100 | |
| $28.02 | +0.01 | 0.0% | $28.04 | $28.04 | $28.00 | 5,800 | |
| $28.01 | 0.00 | 0.0% | $28.00 | $28.02 | $27.99 | 3,451 | |
| $28.01 | -0.015 | -0.1% | $28.01 | $28.01 | $27.99 | 771 | |
| $28.03 | +0.009 | 0.0% | $28.03 | $28.03 | $28.03 | 100 | |
| $28.02 | +0.011 | 0.0% | $27.99 | $28.02 | $27.99 | 3,600 | |
| $28.01 | 0.00 | 0.0% | $27.98 | $28.01 | $27.98 | 4,600 | |
| $28.01 | +0.01 | 0.0% | $27.98 | $28.01 | $27.97 | 900 | |
| $28.00 | +0.019 | +0.1% | $27.97 | $28.00 | $27.97 | 3,900 | |
| $27.98 | +0.045 | +0.2% | $27.93 | $27.98 | $27.93 | 800 | |
| $27.93 | +0.036 | +0.1% | $27.92 | $27.93 | $27.91 | 5,500 | |
| $27.90 | -0.035 | -0.1% | $27.89 | $27.92 | $27.86 | 1,600 | |
| $27.93 | +0.02 | +0.1% | $27.93 | $27.93 | $27.93 | 100 | |
| $27.91 | +0.005 | 0.0% | $27.90 | $27.91 | $27.88 | 14,700 | |
| $27.91 | +0.015 | +0.1% | $27.91 | $27.91 | $27.88 | 1,500 | |
| $27.89 | -0.03 | -0.1% | $27.92 | $27.92 | $27.89 | 200 | |
| $27.92 | +0.005 | 0.0% | $27.90 | $27.92 | $27.90 | 1,500 | |
| $27.92 | +0.02 | +0.1% | $27.92 | $27.92 | $27.92 | 100 | |
| $27.90 | +0.005 | 0.0% | $27.89 | $27.93 | $27.89 | 1,400 |
- Ticker
- NYSE Arca:CPST
- Asset type
- ETF
- Exchange
- NYSE Arca
- Currency
- USD
Calamos S&P 500 Structured Alt Protection ETF - September on 6ix
- What it is
- Exchange-traded fund (ETF)
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