BTC's 90000 Call OI Jump Was a Seller Loading Up, Not Buyers Chasing $90k
Open interest at the BTC 90000 call (30-Oct-26 expiry, ~57 DTE, spot $81,056) rose from 1,644 to 2,626 contracts inside a single hour on Sep 3. Read in isolation, that OI build looks like fresh upside speculation. The taker tape says otherwise.
| Metric | 7d aggressor tape (168h) | Spike bucket (12:00-16:00 UTC) | Strike-level 24h |
|---|---|---|---|
| Net premium | -$1.48M | -$2.16M | -$2.15M |
| Buyer aggression | seller-dominant | 0.007 | 0.009 |
| Block trades | mixed | 1 | 1 |
| Call OI Δ | — | — | +982.9 contracts |
A single block trade carried sell volume of 1,103 contracts (roughly $89M underlying notional) with buyerAggression collapsing to 0.007 — essentially zero buy-side participation. Across the full 168-hour window this strike still nets seller-dominant, with only two buyer-led clusters (Aug 28 and Sep 2) offsetting a steady seller drip. The OI increase is consistent with a large writer opening fresh short call exposure and collecting premium, not with directional buyers positioning for a run to $90k. Across the rest of the 30-Oct board, no other strike's 24h delta comes close — 90000 alone accounts for roughly half the expiry's net call OI growth.