100 × the value of shares sold short ÷ market capitalisation, summed across the AI 100's US-listed public companies on each FINRA settlement date (twice a month, from April 2020), so a company counts in proportion to its size.
Float is not published freely, so shares outstanding stand in for it: the figure reads a little lower than short interest as a share of float would.
A point is published once companies with short interest data represent at least 80% of the US-listed members' market cap. A stock whose short position comes to more than half its market cap is left out as a data mismatch. Values before the list date apply the list selected on that date backwards and are hypothetical.
Changes
No changes since the list date.
Sources: FINRA consolidated short interest, and exchange prices.
How the AI short interest as % float is built · Indices · The Inference · The Inference