CPST · Calamos S&P 500 Structured Alt Protection ETF - September ETF
$28.13
-0.05 (-0.16%)
At close · Sep 4
Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.
CPST Latest Reported Short Interest
FINRA reported 4,224 CPST shares sold short as of the August 14, 2026 settlement date, an increase of 1,809 shares. Days to cover was 1.83 based on FINRA's reported average daily volume.
Official FINRA short-interest data · share counts are restated for subsequent splits of this listing
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
|
2026-09-15
Scheduled
FINRA publishes Sep 24
|
— | — | — | — |
|
2026-08-31
Scheduled
FINRA publishes Sep 10
|
— | — | — | — |
| 2026-08-14 | 4,224 | 2,415 | +1,809 | 1.83 |
| 2026-07-31 | 2,415 | 2,912 | -497 | 1.03 |
| 2026-07-15 | 2,912 | 2,281 | +631 | 6.17 |
| 2026-06-30 | 2,281 | 4,562 | -2,281 | 1.69 |
| 2026-06-15 | 4,562 | 2,396 | +2,166 | 3.00 |
| 2026-05-29 | 2,396 | 2,442 | -46 | 2.51 |
| 2026-05-15 | 2,442 | 3,536 | -1,094 | 1.00 |
| 2026-04-30 | 3,536 | 3,384 | +152 | 4.28 |
| 2026-04-15 | 3,384 | 3,381 | +3 | 4.56 |
| 2026-03-31 | 3,381 | 3,510 | -129 | 4.38 |
| 2026-03-13 | 3,510 | 5,165 | -1,655 | 1.00 |
| 2026-02-27 | 5,165 | 5,740 | -575 | 2.45 |
| 2026-02-13 | 5,740 | 278 | +5,462 | 1.49 |
| 2026-01-30 | 278 | 2,898 | -2,620 | 1.00 |
| 2026-01-15 | 2,898 | 6,414 | -3,516 | 2.15 |
| 2025-12-31 | 6,414 | 8,099 | -1,685 | 4.96 |
| 2025-12-15 | 8,099 | 7,116 | +983 | 3.75 |
| 2025-11-28 | 7,116 | 7,709 | -593 | 3.15 |
| 2025-11-14 | 7,709 | 9,172 | -1,463 | 3.91 |
| 2025-10-31 | 9,172 | 14,356 | -5,184 | 3.63 |
| 2025-10-15 | 14,356 | 12,927 | +1,429 | 5.62 |
| 2025-09-30 | 12,927 | 13,370 | -443 | 2.29 |
| 2025-09-15 | 13,370 | 917 | +12,453 | 1.00 |
Full FINRA short interest reporting calendar
Showing 1–23 of 23 settlements