Coinbase Assets to Move Anthropic Perpetuals From ANTH to ANT Nov. 16

Coinbase Assets plans to change the benchmark for its Anthropic pre-IPO perpetual contract on Nov. 16, moving it from a company-valuation measure to a per-share price index. The switch is scheduled for 5 a.m. ET (10:00 UTC) Monday. The current index is based on 1 billion shares; the replacement will use a base of 13.116 billion shares. Trading will pause during the change, and Coinbase will cancel unfilled ANTH orders. Existing ANTH perpetual positions on Coinbase Markets will transfer through fee-free block trades into economically equivalent ANT positions.