Circle's biggest rivals just agreed to stop keeping the yield for themselves.

Most of the agentic-commerce coverage this month has been about protocols: who can move money on an agent's behalf and under what limit. On 30 June the fight moved one layer down, to the asset itself. More than 140 companies, including Visa, Mastercard, Stripe, Coinbase and BlackRock, launched a stablecoin built to compete with Circle's USDC on economics rather than distribution. The market noticed immediately.

Open USD launches, and it gives the reserve income back

Open Standard, an independent company founded by Zach Abrams, the co-founder of stablecoin infrastructure firm Bridge that Stripe acquired in 2024, unveiled Open USD (OUSD) on 30 June [1]. Launch partners include Visa, Mastercard, American Express, Stripe, Coinbase, BlackRock, BNY, Standard Chartered, U.S. Bank, Google, Shopify and Ripple, among more than 140 others spanning payments, banking and crypto [2]. Businesses can mint and redeem Open USD without fees or volume limits, and most of the income the reserves earn on short-term Treasuries goes back to the participating businesses, after a small management fee, rather than staying with a single issuer [1]. Governance sits with the member companies, not one company. Tempo's chief executive, Matt Huang, said the token will be natively issued on Tempo's network from day one, with support for payments, liquidity, exchanges and decentralised finance [1].

Circle's stock told you how it landed

Circle's shares fell more than 17 percent on the day, closing below 63 dollars, their weakest level since late February and down 55 percent from mid-May [2]. The reason is specific, not sentiment. Circle earns most of its revenue from the interest on the Treasuries backing USDC and keeps the bulk of it. Open USD's whole pitch is to hand that yield to the businesses actually moving the token, which is a direct shot at the part of Circle's model that pays the bills [2]. Circle's chief executive, Jeremy Allaire, played it down publicly, calling stablecoins "one of the largest market opportunities in the world" and welcoming the competition [2]. The model Open USD is copying already has a working precedent in the Global Dollar Network, the Paxos-led stablecoin backed by Robinhood, Kraken and Galaxy that shares reserve income the same way [2].

Where this meets the agent layer

The timing is not incidental. Mastercard's own Agent Pay for Machines protocol, built for high-frequency, low-value transactions between AI agents, launched three weeks earlier with Stripe, Coinbase, Adyen and more than thirty other partners already listed as supporters [3]. The same networks now underwriting a machine-payment rail are underwriting the settlement asset that will move across it. If agents are going to transact at machine speed and machine volume, the businesses running them have every reason to want the reserve yield on the money sitting in the pipe, not just the fee for moving it.

Read from the rails

The detail that matters is who is giving up the revenue. Circle built a real business on the spread between what USDC pays holders (nothing) and what the Treasuries backing it earn (a lot). Open USD's backers are payment networks and banks that make their money on volume and distribution, not on holding reserves, so handing the yield to their own businesses costs them very little and buys them control of a settlement layer they do not currently own. Ten years watching payment rails get renegotiated taught me that the side with the distribution usually ends up owning the economics, eventually. This is that fight starting in the open.

What I would watch next is not the partner list, it is the redemption mechanics once real volume hits it. A stablecoin that shares yield still has to redeem on demand, reconcile against a hundred-plus partners' books, and survive a bad week in the underlying Treasury market without a run. Open USD has the names. It has not yet had the incident.

Circle built a business on keeping the yield. Open USD's whole pitch is giving it back to the businesses that move the money. That is a cheaper trade for a bank or a network than for an issuer, and the stock market did the math in one afternoon.