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.
> Now; SI = [Number of Share Short] + [Float] / [Float]
So you're saying that SI is always reported as higher than 100% now?
Since that's not the cause, are you saying there's negative number of short shares now?
The 220% was in Feb.