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XBI · State Street(R) SPDR(R) S&P(R) Biotech ETF · Short Interest ETF

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$153.24 +5.38 (+3.64%) At close · Oct 20
Volume · Oct 20 12.36M Avg daily vol (3M) 8.81M

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 →

XBI Latest Reported Short Interest

FINRA reported 74,208,736 XBI shares sold short as of the September 30, 2026 settlement date, a decrease of 1,055,429 shares. Days to cover was 8.00 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 74,208,736 75,264,165 -1,055,429 8.00
    2026-09-15 75,264,165 74,456,760 +807,405 9.91
    2026-08-31 74,456,760 77,134,345 -2,677,585 8.10
    2026-08-14 77,134,345 78,847,922 -1,713,577 10.39
    2026-07-31 78,847,922 75,109,557 +3,738,365 9.52
    2026-07-15 75,109,557 75,148,378 -38,821 8.34
    2026-06-30 75,148,378 79,068,702 -3,920,324 6.30
    2026-06-15 79,068,702 76,993,110 +2,075,592 9.09
    2026-05-29 76,993,110 74,341,107 +2,652,003 9.72
    2026-05-15 74,341,107 74,759,404 -418,297 8.73
    2026-04-30 74,759,404 73,334,898 +1,424,506 10.24
    2026-04-15 73,334,898 85,442,601 -12,107,703 7.59
    2026-03-31 85,442,601 76,727,653 +8,714,948 8.10
    2026-03-13 76,727,653 76,616,433 +111,220 7.35
    2026-02-27 76,616,433 76,806,715 -190,282 8.42
    2026-02-13 76,806,715 78,134,359 -1,327,644 9.00
    2026-01-30 78,134,359 80,184,169 -2,049,810 8.82
    2026-01-15 80,184,169 77,756,282 +2,427,887 7.08
    2025-12-31 77,756,282 80,476,208 -2,719,926 10.08
    2025-12-15 80,476,208 76,120,323 +4,355,885 7.82
    2025-11-28 76,120,323 76,138,417 -18,094 7.46
    2025-11-14 76,138,417 68,946,860 +7,191,557 5.80
    2025-10-31 68,946,860 72,301,700 -3,354,840 6.99

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements