Arbitrum (ARB). Source: photo_gonzo - stock.adobe.com

Key Takeaways:

Arbitrum (ARB) surged 17% amid speculation of a partnership with Robinhood following a post promoting a major crypto event.
A Robinhood-hosted fireside chat featuring Vitalik Buterin and Arbitrum leadership fueled rumors of a blockchain collaboration.
Despite the spike, ARB remains down nearly 50% year-to-date and far below its January 2024 high.

Arbitrum’s token (ARB) surged 17% amid speculation of a partnership with Robinhood Markets, sparked by a Sunday post on X promoting an upcoming fireside chat in Cannes.

The event will feature Ethereum co-founder Vitalik Buterin, Robinhood Crypto GM Johann Kerbrat, and Offchain Labs CSO A.J.

Vitalik’s in town.

Join us in Cannes for a fireside chat with our crypto GM, @JohannKerbrat, the founder of Ethereum, @VitalikButerin, and the CSO of @offchainlabs, @ajwarner90.

Tune in tomorrow at 7:45pm CEST on Robinhood X and YouTube.
— Robinhood (@RobinhoodApp) June 29, 2025

Warner, fueling rumors that Robinhood may adopt Arbitrum’s technology.

The chat is being marketed as Robinhood Europe’s “biggest crypto announcement of the year.”

Talk of a tie-up has been circulating since May, when reports indicated Robinhood was developing a blockchain-based platform to let European users access U.S. stocks.

Both Arbitrum and Solana were considered, but no deal was finalized.

Crypto figures like former Ethereum developer Eric Connor and Dragonfly partner Omar Kanji added fuel, with Kanji suggesting, “Robinhood going to announce its chain tomorrow.”

Looks like Robinhood chose Arbitrum https://t.co/oq29GIieKA
— Eric Conner (@econoar) June 29, 2025

Following the hype, ARB rose from $0.31 to a peak of $0.386, though it remains down ~50% YTD and about 85% below its January 2024 high of $2.39.

Robinhood shares (HOOD) also edged up 1.65% in overnight trading.

So far, no official partnership has been confirmed, and the price rally appears driven largely by speculation.