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EFFI · Harbor Osmosis International Resource Efficient ETF · Short Interest ETF

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$26.68 +0.23 (+0.87%) At close · Oct 20
Volume · Oct 20 106 Avg daily vol (3M) 1171

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 →

EFFI Latest Reported Short Interest

FINRA reported 4,885 EFFI shares sold short as of the September 30, 2026 settlement date, a decrease of 530 shares. Days to cover was 23.49 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 4,885 5,415 -530 23.49
    2026-09-15 5,415 6,147 -732 51.08
    2026-08-31 6,147 6,769 -622 1.05
    2026-08-14 6,769 6,643 +126 16.43
    2026-07-31 6,643 6,851 -208 34.42
    2026-07-15 6,851 6,912 -61 15.19
    2026-06-30 6,912 7,170 -258 21.60
    2026-06-15 7,170 7,638 -468 45.09
    2026-05-29 7,638 8,057 -419 72.06
    2026-05-15 8,057 8,930 -873 11.68
    2026-04-30 8,930 496 +8,434 8.84
    2026-04-15 496 172 +324 1.98
    2026-03-31 172 103 +69 1.00
    2026-03-13 103 433 -330 1.00
    2026-02-27 433 234 +199 3.64
    2026-02-13 234 230 +4 3.21
    2026-01-30 230 192 +38 1.10
    2026-01-15 192 384 -192 1.24
    2025-12-31 384 197 +187 1.29
    2025-12-15 197 201 -4 5.18
    2025-11-28 201 198 +3 2.39
    2025-11-14 198 165 +33 2.51
    2025-10-31 165 281 -116 3.37

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements