dYdX Labs has rebranded its exchange as Arcus, a next-generation DEX it built jointly with Robinhood Crypto and launched July 1 on Robinhood Chain. Arcus lists 95 tokenized US stocks for spot trading plus waitlisted perpetuals, with 0% web trading fees and pre-IPO access planned. The year-long build pairs dYdX's on-chain derivatives with Robinhood's retail reach. dYdX Labs stays independent, and the DYDX token remains — though it slid ~23% after the announcement.