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CERS · Cerus Corp · Short Volume

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$2.31 +0.09 (+4.05%) At close · Oct 20
Russell 2000 member Rebalance outlook locked
Market Cap
$465.52M
Shares
201.52M
Volume · Oct 20 1.48M Avg daily vol (3M) 2.16M

Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.

Pull daily short volume through the short interest API or MCP →
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    • Short Volume

    Date Short Volume Short Exempt Total Volume Short %
    2026-10-20 116,520 0 526,659 22.1%
    2026-10-19 453,979 326 678,072 67.0%
    2026-10-16 394,670 500 552,398 71.4%
    2026-10-15 215,077 7,437 740,171 29.1%
    2026-10-14 445,764 300 947,709 47.0%
    2026-10-13 296,836 48 876,641 33.9%
    2026-10-12 266,609 5,171 415,956 64.1%
    2026-10-09 110,596 59 273,700 40.4%
    2026-10-08 325,796 3,560 792,085 41.1%
    2026-10-07 179,607 222 289,296 62.1%
    2026-10-06 368,869 547 555,684 66.4%
    2026-10-05 321,196 1,179 673,404 47.7%
    2026-10-02 333,277 883 613,640 54.3%
    2026-10-01 272,838 7,030 661,216 41.3%
    2026-09-30 287,825 30 608,962 47.3%
    2026-09-29 392,747 40 643,448 61.0%
    2026-09-28 216,392 2,226 529,194 40.9%
    2026-09-25 390,985 400 989,354 39.5%
    2026-09-24 232,597 506 729,774 31.9%
    2026-09-23 294,126 495 550,583 53.4%
    2026-09-22 643,545 3,396 1,881,386 34.2%
    2026-09-21 391,344 399 733,965 53.3%
    2026-09-18 367,047 8,987 942,861 38.9%
    2026-09-17 350,821 280 1,184,945 29.6%
    2026-09-16 202,524 0 422,728 47.9%
    2026-09-15 134,582 100 339,862 39.6%
    2026-09-14 167,996 2,467 470,419 35.7%
    2026-09-11 320,090 1,740 644,810 49.6%
    2026-09-10 216,889 142 307,596 70.5%
    2026-09-09 206,722 555 334,986 61.7%
    2026-09-08 151,436 4,068 279,761 54.1%
    2026-09-04 343,464 124 455,254 75.4%
    2026-09-03 156,019 1,126 328,297 47.5%
    2026-09-02 324,513 48 704,625 46.1%
    2026-09-01 211,537 11 388,014 54.5%
    2026-08-31 229,391 0 387,291 59.2%
    2026-08-28 353,283 136 685,899 51.5%
    2026-08-27 164,233 467 331,556 49.5%
    2026-08-26 237,768 132 404,037 58.8%
    2026-08-25 180,577 58 263,296 68.6%
    2026-08-24 474,833 621 700,448 67.8%
    2026-08-21 404,851 228 847,710 47.8%
    2026-08-20 617,951 452 1,239,826 49.8%
    2026-08-19 354,741 516 668,363 53.1%
    2026-08-18 531,902 330 950,103 56.0%
    2026-08-17 726,564 4,561 1,168,751 62.2%
    2026-08-14 511,879 0 827,516 61.9%
    2026-08-13 765,097 2,700 1,343,869 56.9%
    2026-08-12 567,220 0 799,824 70.9%
    2026-08-11 884,180 9 1,117,922 79.1%
    Showing 1–50 of 65 days
    Key facts CIK 1020214 CUSIP 157085101 13F (30d) 18 filings 17 filers Visit website Investor relations