Arbitrum’s ARB token jumped 19% in the past 24 hours as Robinhood Chain, built on Arbitrum’s tech stack, logged $568 million in daily trading volume on Wednesday. According to CoinDesk, the new blockchain—rolled out to the broader public a week ago—also recorded more than $350 million so far on Thursday, with activity driven largely by memecoin trading and stablecoin balances rising above $260 million in its first week. Under the agreement, 10% of Robinhood Chain’s net protocol revenue flows back to the Arbitrum ecosystem.