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EOD US-equity data for investors and AI agents

Data is end-of-day, not real-time, and not investment advice

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CIEN short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float2.6%140,806,000 float shares
Days to Cover1.62,296,038 average daily volume
Open Short Position3,711,106Ciena Corporation
Change vs Previous-282,082-7.1%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 20263,711,106-282,082-7.1%1.62.6%
Jul 15, 20263,993,188+139,749+3.6%2.42.8%
Jun 30, 20263,853,439-907,004-19.1%1.02.7%

Short interest is an open-position snapshot published twice monthly. It is not daily short-sale volume.

Daily off-exchange short volume

FINRA-reported short-sale transaction flow for the last 30 calendar days.

Trade DateShort VolumeShort ExemptFINRA TotalShort Volume %Facilities
Aug 21, 2026196,21317493,80639.7%3
Aug 20, 2026199,063589607,32232.8%3
Aug 19, 2026341,73134,992732,74546.6%3
Aug 18, 2026336,31416,1011,295,53426.0%3
Aug 17, 2026370,7251,1331,206,54930.7%3
Aug 14, 2026338,55434,0781,231,14627.5%3
Aug 13, 2026628,6971241,425,92244.1%3
Aug 12, 2026779,8239,2462,180,27235.8%3
Aug 11, 2026210,8154,924631,88733.4%3
Aug 10, 2026356,7975,632806,94544.2%3
Aug 7, 2026377,5961,113921,13241.0%3
Aug 6, 2026179,762343505,58835.6%3
Aug 5, 2026372,952719875,27942.6%3
Aug 4, 2026382,1298858,87944.5%3
Aug 3, 2026235,975990581,68240.6%3
Jul 31, 2026604,05718985,19861.3%3
Jul 30, 2026638,4582,3841,050,28360.8%3
Jul 29, 2026676,05111,6931,304,88651.8%3
Jul 28, 2026677,39217,9392,063,07832.8%3
Jul 27, 2026288,367380732,81839.4%3
Jul 24, 2026511,916625740,25469.2%3

Daily short volume is transaction flow reported through FINRA facilities. It does not measure open short positions and is not consolidated exchange-wide volume.