CPSA
Calamos S&P 500 Structured Alt Protection ETF - August
stockNYSEETF
At CloseOct 2, 2026 3:45:06 PM EDT
28.18USD+0.189%(+0.05)1,006
28.09Bid28.22Ask0.13SpreadAs of 2026-09-15, there were 19,662 shares short with a short interest of 1.16%.
CPSA Short Interest - Official
Short Interest
CPSA Short Position Change - Official
Short Position Change
CPSA Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 1.16 | 19,662 | 5.16 | -22,244 | -53.08 | 1,700,000 | 1,700,000 |
| 2026-08-31 | 2.47 | 41,906 | 8.65 | +10,135 | +31.90 | 1,700,000 | 1,700,000 |
| 2026-08-14 | 1.87 | 31,771 | 1.01 | +28,944 | +1,023.84 | 1,700,000 | 1,700,000 |
| 2026-07-31 | 0.19 | 2,827 | 1.00 | -496 | -14.93 | 1,500,000 | 1,500,000 |
| 2026-07-15 | 0.22 | 3,323 | 1.00 | -173 | -4.95 | 1,500,000 | 1,500,000 |
| 2026-06-30 | 0.23 | 3,496 | 1.00 | -239 | -6.40 | 1,500,000 | 1,500,000 |
| 2026-06-15 | 0.25 | 3,735 | 1.73 | -388 | -9.41 | 1,500,000 | 1,500,000 |
| 2026-05-15 | 0.26 | 4,123 | 2.64 | -103 | -2.44 | 1,600,000 | 1,600,000 |
| 2026-04-30 | 0.26 | 4,226 | 5.13 | -3,926 | -48.16 | 1,600,000 | 1,600,000 |
| 2026-04-15 | 0.51 | 8,152 | 11.24 | +4,053 | +98.88 | 1,600,000 | 1,600,000 |
| 2026-03-31 | 0.26 | 4,099 | 3.24 | -281 | -6.42 | 1,600,000 | 1,600,000 |
| 2026-03-13 | 0.27 | 4,380 | 1.95 | +739 | +20.30 | 1,600,000 | 1,600,000 |
| 2026-02-27 | 0.23 | 3,641 | 1.05 | -22 | -0.60 | 1,600,000 | 1,600,000 |
| 2026-02-13 | 0.23 | 3,663 | 1.00 | +3,021 | +470.56 | 1,600,000 | 1,600,000 |
| 2026-01-30 | 0.04 | 642 | 1.00 | -3,022 | -82.48 | 1,600,000 | 1,600,000 |
| 2025-12-31 | 0.22 | 3,664 | 1.27 | +3,384 | +1,208.57 | 1,700,000 | 1,700,000 |
| 2025-12-15 | 0.02 | 280 | 1.00 | -277 | -49.73 | 1,700,000 | 1,700,000 |
| 2025-11-28 | 0.03 | 557 | 1.00 | 0 | 0.00 | 1,700,000 | 1,700,000 |
| 2025-11-14 | 0.03 | 557 | 1.00 | -3,366 | -85.80 | 1,800,000 | 1,800,000 |
| 2025-10-31 | 0.22 | 3,923 | 1.34 | -7,819 | -66.59 | 1,800,000 | 1,800,000 |
| 2025-10-15 | 0.65 | 11,742 | 2.92 | -12,308 | -51.18 | 1,800,000 | 1,800,000 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.