Why is Arbitrum (ARB) up 33.64% Today, September 1, 2026? Robinhood Chain activity and heavy turnover lift Arbitrum beta

AI Market Summary
Arbitrum (ARB) surged ~34% on exceptionally high turnover (24h volume ~54% of market cap) amid renewed rollup rotation and reported Robinhood Chain activity built on Arbitrum tech, reinforcing ecosystem beta demand. However, momentum is stretched (short-term RSI overbought) and a Sep 16 unlock (~92.6M ARB) creates a near-term supply overhang, making post-event absorption and flow data critical for stability.
Impact level
● High
Affected assets
ARB/USDT+24.41%
AI Insight · ARB/USDTAI Insight
▲ Bullish
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ARB gains 33.64% as volume reaches USD 407.99M, Robinhood Chain activity expands and a September unlock keeps supply risk in focus.