CPSU
Calamos S&P 500 Structured Alt Protection ETF - June
stockNYSEETF
At CloseOct 1, 2026 3:59:45 PM EDT
27.88USD0.000%(+27.88)51
After-hoursOct 2, 2026 4:10:30 PM EDT
27.98USD+0.342%(+0.10)
As of 2026-09-15, there were 3,645 shares short with a short interest of 0.36%.
CPSU Short Interest - Official
Short Interest
CPSU Short Position Change - Official
Short Position Change
CPSU 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 | 0.36 | 3,645 | 1.17 | -1,847 | -33.63 | 1,000,000 | 1,000,000 |
| 2026-08-31 | 0.55 | 5,492 | 5.12 | -5,611 | -50.54 | 1,000,000 | 1,000,000 |
| 2026-08-14 | 1.11 | 11,103 | 7.73 | +604 | +5.75 | 1,000,000 | 1,000,000 |
| 2026-07-31 | 1.17 | 10,499 | 5.27 | -6,018 | -36.44 | 900,000 | 900,000 |
| 2026-07-15 | 1.84 | 16,517 | 7.33 | -2,302 | -12.23 | 900,000 | 900,000 |
| 2026-06-30 | 2.09 | 18,819 | 1.12 | -11,838 | -38.61 | 900,000 | 900,000 |
| 2026-06-15 | 3.83 | 30,657 | 1.00 | +21,918 | +250.81 | 800,000 | 800,000 |
| 2026-05-15 | 1.75 | 8,739 | 9.76 | +2,075 | +31.14 | 500,000 | 500,000 |
| 2026-04-30 | 1.33 | 6,664 | 138.83 | +114 | +1.74 | 500,000 | 500,000 |
| 2026-04-15 | 1.31 | 6,550 | 14.36 | -603 | -8.43 | 500,000 | 500,000 |
| 2026-03-31 | 1.43 | 7,153 | 56.77 | -788 | -9.92 | 500,000 | 500,000 |
| 2026-03-13 | 1.59 | 7,941 | 5.38 | -12,208 | -60.59 | 500,000 | 500,000 |
| 2026-02-27 | 4.03 | 20,149 | 23.68 | -4,124 | -16.99 | 500,000 | 500,000 |
| 2026-02-13 | 4.85 | 24,273 | 11.12 | +7,100 | +41.34 | 500,000 | 500,000 |
| 2026-01-30 | 4.29 | 17,173 | 85.87 | +2,804 | +19.51 | 400,000 | 400,000 |
| 2026-01-15 | 3.59 | 14,369 | 31.10 | -1,684 | -10.49 | 400,000 | 400,000 |
| 2025-12-31 | 4.01 | 16,053 | 119.80 | +124 | +0.78 | 400,000 | 400,000 |
| 2025-12-15 | 3.98 | 15,929 | 17.88 | -1,968 | -11.00 | 400,000 | 400,000 |
| 2025-11-28 | 4.47 | 17,897 | 31.07 | -4,013 | -18.32 | 400,000 | 400,000 |
| 2025-11-14 | 5.48 | 21,910 | 999.99 | +98 | +0.45 | 400,000 | 400,000 |
| 2025-10-31 | 5.45 | 21,812 | 127.56 | -1,085 | -4.74 | 400,000 | 400,000 |
| 2025-10-15 | 5.72 | 22,897 | 25.38 | +1,514 | +7.08 | 400,000 | 400,000 |
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.