TVL Trend Analysis & Liquidity Risk Assessment: Arbitrum Bridge

Recent security assessments from September 13, 2026, analyze two major bridge protocols. The Arbitrum Bridge, utilizing a canonical optimistic roll-up design, secures approximately $3.28 B in total value locked, accounting for 12% of assets on Arbitrum. Simultaneously, Robinhood operates a high-throughput cross-chain bridge managing $14.27 B across Ethereum, various Layer-2 solutions like Optimism and zkSync, and EVM-compatible chains including Polygon and BSC, serving as a critical component for the platform's instant-settlement functionality.