BTC's 77000 Put OI Triples Into Expiry While the Taker Tape Shrugs

BTC's 77000 put — dead-center ATM for the Nov-3 08:00 UTC expiry, roughly 14 hours out — built open interest from 32.9 to 117.1 contracts over the prior sessions, a ~255% jump. The lit tape never caught up to it: over the trailing 24h the strike traded 13.8 BTC bought versus 17.2 BTC sold (buyerAggression 0.42, net premium -$1,263), and across 48h of bucketed aggressor data net premium was just -$2,141 on 71 trades — balanced to mildly seller-led, nothing resembling a directional surge.

Compare that to where today's real OI action sits: the 78000 strike absorbed +237 calls and +115 puts (largest absolute flow on the board), 77500 puts added +172, and 76000 puts +163 — all dwarfing the 77000 strike's own 24h delta of just +2 calls / +4.6 puts. The multi-day build at the money happened quietly, outside the window where taker flow would explain it.

Context: max pain sits at 78000 (1.24% away), gamma flip at 77776 is the active magnet (0.95% away), and the gex centroid (77050) is pinned almost exactly on spot. 24h liquidations lean long-squeeze (75.8% long share, $4.5M notional).