Today's storm

How the scale is set. Each trading day's net flow is the combined creations minus redemptions across all twelve US spot Bitcoin ETFs, in US dollars, as reported by Farside Investors. The rating is the day's rank against the trailing 252 trading days (one market year) of daily flows, ignoring sign: 0 is below the median, 1 is above it, 2 is top 30%, 3 is top 15%, 4 is top 5%, and 5 is a top-1% day — the ones that make the record books. Thresholds re-compute every night, so an F4 in a quiet year and an F4 in a wild year are both "a big day for that year". The dollar ranges above are tonight's cut-offs. BTC equivalents use that day's Coinbase close and are estimates.