CoinEx News: As of July 9, 2026, Arbitrum's ARB token rose about 19% over the past week. Two catalysts landed together. Robinhood Chain — an Ethereum Layer 2 on Arbitrum's stack, opened more widely about a week earlier — logged over $568 million in trading volume on July 8 and more than $350 million by July 9, with memecoin activity driving much of the flow. On July 8, Offchain Labs co-founder Steven Goldfeder said Robinhood Chain and other Arbitrum Expansion Program L2s send 10% of protocol net revenue — fees left after costs — back to the Arbitrum ecosystem: 8% to the tokenholder-controlled DAO treasury and 2% to development funding.