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CPSA · Calamos S&P 500 Structured Alt Protection ETF - August · Short Interest ETF

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$28.17 -0.03 (-0.11%)
Volume · Oct 23 1494 Avg daily vol (3M) 8145

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 →

CPSA Latest Reported Short Interest

FINRA reported 20,015 CPSA shares sold short as of the September 30, 2026 settlement date, an increase of 353 shares. Days to cover was 16.26 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 20,015 19,662 +353 16.26
    2026-09-15 19,662 41,906 -22,244 5.16
    2026-08-31 41,906 31,771 +10,135 8.65
    2026-08-14 31,771 2,827 +28,944 1.01
    2026-07-31 2,827 3,323 -496 1.00
    2026-07-15 3,323 3,496 -173 1.00
    2026-06-30 3,496 3,735 -239 1.00
    2026-06-15 3,735 4,145 -410 1.73
    2026-05-29 4,145 4,123 +22 1.00
    2026-05-15 4,123 4,226 -103 2.64
    2026-04-30 4,226 8,152 -3,926 5.13
    2026-04-15 8,152 4,099 +4,053 11.24
    2026-03-31 4,099 4,380 -281 3.24
    2026-03-13 4,380 3,641 +739 1.95
    2026-02-27 3,641 3,663 -22 1.05
    2026-02-13 3,663 642 +3,021 1.00
    2026-01-30 642 0 +642 1.00
    2025-12-31 3,664 280 +3,384 1.27
    2025-12-15 280 557 -277 1.00
    2025-11-28 557 557 0 1.00
    2025-11-14 557 3,923 -3,366 1.00
    2025-10-31 3,923 11,742 -7,819 1.34

    Full FINRA short interest reporting calendar

    Showing 1–22 of 22 settlements