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> They've changed the way the calculate SI now

This is nonsense. Who is “they”?

FINRA and the SEC require brokers to report short interest data twice a month [1]. These are share aggregates. FINRA then provides those data for U.S.-listed companies to the exchanges, who publish it. None of those exchanges have changed their publishing methodologies in years.

[1] https://www.finra.org/investors/insights/short-interest




"They" are the data aggregation websites that post shares SI.

FINRA and the SEC have nothing to do with the actual calculation of SI that various websites report.

Read; https://www.reddit.com/r/wallstreetbets/comments/lbydkz/s3_p...

S3 SI% of Float = Shares Sold Short/(Float + Shares Sold Short)




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