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CPSM · Calamos S&P 500 Structured Alt Protection ETF - May · Short Interest ETF

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$29.74 +0.03 (+0.10%) At close · Oct 21
Volume · Oct 21 2828 Avg daily vol (3M) 2289

Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.

Pull short interest history through the short interest API or MCP →

CPSM Latest Reported Short Interest

FINRA reported 1,021 CPSM shares sold short as of the September 30, 2026 settlement date, a decrease of 3,377 shares. Days to cover was 1.00 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent splits of this listing

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 1,021 4,398 -3,377 1.00
    2026-09-15 4,398 4,745 -347 1.99
    2026-08-31 4,745 10,917 -6,172 3.74
    2026-08-14 10,917 11,330 -413 6.15
    2026-07-31 11,330 12,823 -1,493 3.74
    2026-07-15 12,823 12,748 +75 7.63
    2026-06-30 12,748 19,000 -6,252 4.48
    2026-06-15 19,000 27,938 -8,938 3.03
    2026-05-29 27,938 4,199 +23,739 2.92
    2026-05-15 4,199 8,146 -3,947 1.00
    2026-04-30 8,146 5,048 +3,098 1.90
    2026-04-15 5,048 7,045 -1,997 2.54
    2026-03-31 7,045 6,201 +844 1.99
    2026-03-13 6,201 8,763 -2,562 1.85
    2026-02-27 8,763 9,053 -290 6.18
    2026-02-13 9,053 474 +8,579 1.47
    2026-01-30 474 3 +471 1.00
    2026-01-15 3 806 -803 1.00
    2025-12-31 806 1,221 -415 1.00
    2025-12-15 1,221 561 +660 1.00
    2025-11-28 561 503 +58 1.00
    2025-11-14 503 502 +1 1.00
    2025-10-31 502 1,440 -938 1.00

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements