CPSO
Calamos S&P 500 Structured Alt Protection ETF - October
stockNYSEETF
Market OpenOct 2, 2026 3:10:27 PM EDT
28.43USD0.000%(0.00)2,616
28.39Bid28.47Ask0.08SpreadAs of 2026-09-15, there were 17,977 shares short with a short interest of 1.89%.
CPSO Short Interest - Official
Short Interest
CPSO Short Position Change - Official
Short Position Change
CPSO 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 | 1.89 | 17,977 | 36.61 | -1,600 | -8.17 | 1,000,000 | 948,827 |
| 2026-08-31 | 2.06 | 19,577 | 15.38 | +5,782 | +41.91 | 1,000,000 | 948,827 |
| 2026-08-14 | 1.45 | 13,795 | 8.74 | +2,889 | +26.49 | 1,000,000 | 948,827 |
| 2026-07-31 | 1.09 | 10,906 | 4.80 | +431 | +4.11 | 1,000,000 | 1,000,000 |
| 2026-07-15 | 1.05 | 10,475 | 18.19 | -3,839 | -26.82 | 1,000,000 | 1,000,000 |
| 2026-06-30 | 1.43 | 14,314 | 30.01 | +8,116 | +130.95 | 1,000,000 | 1,000,000 |
| 2026-06-15 | 0.62 | 6,198 | 13.08 | 0 | 0.00 | 1,000,000 | 1,000,000 |
| 2026-05-15 | 0.62 | 6,198 | 6.72 | -144 | -2.27 | 1,000,000 | 1,000,000 |
| 2026-04-30 | 0.63 | 6,342 | 3.11 | +128 | +2.06 | 1,000,000 | 1,000,000 |
| 2026-04-15 | 0.62 | 6,214 | 8.07 | -989 | -13.73 | 1,000,000 | 1,000,000 |
| 2026-03-31 | 0.72 | 7,203 | 6.28 | -1,524 | -17.46 | 1,000,000 | 1,000,000 |
| 2026-03-13 | 0.87 | 8,727 | 10.50 | -2,614 | -23.05 | 1,000,000 | 1,000,000 |
| 2026-02-27 | 1.13 | 11,341 | 5.81 | -3,006 | -20.95 | 1,000,000 | 1,000,000 |
| 2026-02-13 | 1.43 | 14,347 | 7.86 | +7,793 | +118.90 | 1,000,000 | 1,000,000 |
| 2026-01-30 | 0.66 | 6,554 | 2.32 | +1,045 | +18.97 | 1,000,000 | 1,000,000 |
| 2026-01-15 | 0.55 | 5,509 | 1.39 | -2,927 | -34.70 | 1,000,000 | 1,000,000 |
| 2025-12-31 | 0.84 | 8,436 | 9.84 | -890 | -9.54 | 1,000,000 | 1,000,000 |
| 2025-12-15 | 0.93 | 9,326 | 5.99 | +1,205 | +14.84 | 1,000,000 | 1,000,000 |
| 2025-11-28 | 0.81 | 8,121 | 1.34 | -4,629 | -36.31 | 1,000,000 | 1,000,000 |
| 2025-11-14 | 2.13 | 12,750 | 3.38 | +3,289 | +34.76 | 600,000 | 600,000 |
| 2025-10-31 | 1.58 | 9,461 | 1.00 | -6,969 | -42.42 | 600,000 | 600,000 |
| 2025-10-15 | 2.74 | 16,430 | 1.00 | +13,219 | +411.68 | 600,000 | 600,000 |
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.