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Plain-English guides to the data on this site. Educational only; nothing here is investment advice.

• What is short interest?

  Short selling and short interest from first principles: what a net short position actually is.

• US short interest, explained

  FINRA's twice-monthly consolidated report: who reports, the settlement cadence, why it differs from estimate sites, and how we compute the percentage.

• The FCA's ANSP, explained

  What the daily aggregate net short position number includes, what it excludes, and how to read it.

• Who must disclose a short position?

  Disclosure thresholds compared: private notification vs public disclosure, and why the same position is named in Paris, anonymous in London and reported far smaller in Sydney.

• Position date vs publication date

  Every figure carries two dates. Why short data is always old, why a number can sit unchanged for weeks, and why the recent past keeps getting revised.

• What short-selling data cannot tell you

  The honest inventory: no reasons, no identities, no entry prices, no predictions, and the narrow question the data does answer well.

• How UK short disclosure changed in 2026

  The end of named positions: what the old register showed, what replaced it, and why.

• Australia's short position data, explained

  ASIC's daily aggregated reports: who reports, the T+4 delay, and how the numbers differ from the UK's.

• Europe's named short registers, explained

  The EU regime still names short sellers: the 0.5% threshold, the French, Dutch, Norwegian and Swedish registers, and how we aggregate them.

• How to read the data on this site

  League table, movers, company charts, revised figures: a tour of every number we show.

• Short squeeze basics

  The mechanics behind squeezes, and why high short interest alone doesn't predict one.

• What happens to short positions when a company delists?

  Takeovers unwind shorts, registers handle the leftovers differently, and a delisted company can still show a position years later.

• Can short interest exceed 100%?

  Yes, the same share can back several short positions. The re-lending chain, net vs gross, and real examples from official data.

• What is the FCA's Reportable Shares List?

  The list that decides which UK shares are in scope for short reporting, and why leaving it isn't the same as shorts closing.