Launch Robinhood Chain Testnet on Arbitrum with $1M Boost

Robinhood Chain public testnet launched on Arbitrum, validating its phased infrastructure ahead of 2026 mainnet. Robinhood commits $1M to Arbitrum Open House, funding four global buildathons and two Founder Houses. Robinhood deployed 2,000+ Stock Tokens on Arbitrum One. Future chain migration grants ArbitrumDAO 10% protocol revenue share. Institutional partners include BlackRock, Franklin Templeton, and Ethena.