BTC's 63k Call OI Triples on 4-Jul Expiry, But Takers Were Net Sellers

BTC's 4-Jul-2026 63,000 call — a strike sitting roughly 1.6% above the $62,018 spot with under 24h to expiry — shows the largest single-strike OI build across the whole expiry: +334.5 contracts in the last 24h, per the OI-flow scan. Snapshot history confirms the scale: open interest on this strike sat near 37 contracts on July 1 and had reached 401.4 by the latest read, an ~11x expansion.

Cross-referencing against the taker tape tells a different story than "bulls piling in." Over the same 24h window, 178 trades hit this instrument with buyVolume of 55 BTC against sellVolume of 231.5 BTC — a buyerAggression ratio of just 23.6% and net premium of -$6,940, tagged seller-dominant. Compare that to the top OI-flow neighbors: 64,000 (+240.1 contracts) and 62,000 (+201.2 calls / +206.7 puts) both show smaller builds.

Strike	Call OI Δ24h	Put OI Δ24h
63,000	+334.5	0
64,000	+240.1	+3.0
62,000	+201.2	+206.7
62,500	+55.6	0
61,500	+39.9	+39.8

Large OI growth without buyer-led tape typically points to dealers absorbing written call flow rather than retail chasing upside.