JP Morgan CEO Jamie Dimon launched a sharp public attack against Coinbase CEO Brian Armstrong on Friday, making clear his opposition to the Clarity Act and the executive pushing hardest for it.
Speaking in an interview with Fox Business, Dimon said he is deeply dissatisfied with the current version of the Clarity Act — a bill that would establish a regulatory framework for most cryptocurrency activity in the United States — and warned that banks will "not accept it that way." He vowed the banking industry would fight the legislation, adding, "If we lose, we lose."
"It will be fought," Dimon said, before adding: "No one is going to bow down to this guy, or that company" — a reference, though not by name, to Armstrong and Coinbase.
When Fox Business anchor Maria Bartiromo pressed him specifically about Coinbase, Dimon grew more direct: "He's the only one... he's spending hundreds of millions of dollars in Washington on this thing. He's full of shit."
The exchange was captured and shared on social media, with Bartiromo noting that Armstrong had claimed to be representing the broader industry — a characterization Dimon flatly rejected.
Dimon's core objection to the Clarity Act centers on the issue of stablecoin yield — a provision that has become a major sticking point with the banking lobby and has significantly slowed the bill's progress over recent months.
Under the GENIUS Act, which President Donald Trump signed into law last July, stablecoin issuers such as Tether or Circle are prohibited from directly offering yield to clients. However, the law permits third-party platforms — such as cryptocurrency exchanges including Coinbase — to offer yield on stablecoin holdings instead.
Banks have been pushing to include language in the Clarity Act that would close that loophole. Crypto industry players, led by Coinbase, have fought to preserve the ability of platforms to continue offering stablecoin-linked yield to customers.
The standoff has delayed the Clarity Act's potential passage by more than four months. Coinbase at one point withdrew its support for the bill entirely before compromise language on stablecoin rewards was introduced.
Dimon has been a consistent critic of the stablecoin yield arrangement. About two months ago, he warned that "the public will pay" as a result of these provisions. On Friday, he reiterated his view that the practice would "eventually blow up on its own."
Back in March, Dimon had offered a blunt prescription for crypto firms seeking to operate like banks: "If you want to be a bank, become a bank. Then you can do whatever you want under bank law."
Despite the prolonged back-and-forth, the Clarity Act cleared a key Senate Banking Committee vote earlier this month and will now advance to the Senate floor for a potential final vote.
President Trump has continued to push for the bill's passage, posting earlier this week that he aims to "codify a future proof digital asset market structure." Prediction market Polymarket currently gives the bill approximately a 59% chance of being signed into law before the end of 2026.
Why it matters
The stablecoin yield dispute is not merely procedural: it determines whether crypto exchanges like Coinbase can continue offering interest-like returns on stablecoin holdings, a product that competes directly with bank deposit accounts.
The GENIUS Act's existing prohibition on issuers paying yield directly — while allowing third-party platforms to do so — created a structural gap that banks are now trying to close through the Clarity Act, making the two bills interdependent in ways that complicate the legislative path forward.
Coinbase's temporary withdrawal of support for the Clarity Act illustrates how a single company's lobbying posture can stall major financial legislation, a dynamic Dimon is publicly contesting.
