Hyperliquid has rolled out portfolio margin functionality on its testnet environment. This feature allows traders to manage their collateral more efficiently across multiple positions, optimizing capital utilization in margin trading strategies. Portfolio margin represents a significant upgrade to the platform's risk management infrastructure, enabling more sophisticated portfolio-level risk calculations rather than individual position assessments. The testnet deployment phase marks an important milestone ahead of mainnet integration, giving the community an opportunity to stress-test the mechanics and provide feedback. For active traders engaging in complex multi-asset strategies, this advancement could streamline position management and potentially reduce margin requirements through improved netting calculations.