Anthropic’s pre-IPO perpetual is rebasing from a valuation-based index using 1B share count to a price-per-share index using 13.116B as the new share count on Monday November 16 at 10:00 UTC. What’s changing: → Open ANTH perpetual positions on Coinbase Markets will migrate to economically equivalent ANT perpetual positions via zero-fee block trades. → Trading will temporarily pause, and all open ANTH orders will be cancelled during migration. → Once migration is complete, ANTH will be delisted and ANT will open for trading.