James Seyffart (@JSeyff) — Twitter Score 384 out of 1000

James Seyffart is an ETF research analyst at Bloomberg Intelligence who covers crypto ETFs, with a focus on U.S. spot bitcoin and ether ETF market developments. James Seyffart's Twitter Score is 384 out of 1000 (an Excellent rating) as of October 2026, ranking #614 (top 0.5%) among 493,668 tracked accounts.

James Seyffart works at Bloomberg Intelligence, affiliated with Bloomberg, where his research has tracked the evolution of the U.S. spot bitcoin ETF market from launch. He shared data showing that Grayscale Bitcoin Trust accounted for nearly 90% of the spot bitcoin ETF market shortly after launch, and noted that demand for spot bitcoin ETFs surpassed expectations after BlackRock's trust crossed $10 billion in assets. He also provided data on first-day options trading volume for BlackRock's iShares Bitcoin Trust.

James Seyffart has offered analysis across a range of crypto ETF products and regulatory developments. He estimated that spot ether ETF flows would reach 20 to 25% of spot bitcoin ETF flows, compared their first-day trading volumes, and described ether futures ETF launches as a complete flop. He characterized VanEck's first spot Solana ETF application as a call option on the November election, and has explained the SEC's 2025 generic listing standards for commodity-based ETPs as a key criterion shaping the crypto ETF landscape. He also estimated that many bitcoin ETF investors were underwater, with an average buy-in price around $83,000.

James Seyffart has 183,703 followers as of October 2026 and has published 27,069 posts. He has been mentioned by 331 accounts, with 1,100 total mentions.

Who follows James Seyffart on X?

The accounts that follow James Seyffart include 1,222 founders, 277 angel investors, 889 influencers and 25 VCs. Among them are ZachXBT, Cobie, Ansem, Toly, Solana and Laura Shin.