NEW YORK, May 1 - The U.S. Treasury looks set to maintain the size of its coupon auctions for a ninth straight quarter when it publishes its quarterly financing estimates on May 4 and follows with a refunding notice on May 6. That refunding will detail planned auction sizes for three-year and 10-year notes and 30-year bonds - the headline coupon issuance that denotes interest-paying securities, as distinct from short-term, non-interest-bearing bills.
Investors and market strategists will be paying close attention to whether the Treasury uses the refunding as an occasion to signal changes in coupon supply later in the year. Some analysts say officials could use the twin announcements to prepare markets for a gradual shift toward larger coupon auctions, though there is no definitive indication that such a change will be announced.
Jan Nevruzi, U.S. rates strategist at TD Securities in New York, said market participants are seeking clarity from Treasury on its options: "We’re just looking for guidance on what the Treasury can do with coupons. Right now, they say that they’re well-suited to maintain auction sizes steady for the next several quarters, which means it’s unlikely that you get any changes before 2027." Nevruzi expects any increase in auction sizes to begin in February of next year, while Citi's timing outlook is later, with the bank anticipating higher auction sizes in mid-2027.
Tariff refunds add pressure to near-term cash flows
Recent legal and fiscal developments are changing short-term government cash dynamics and elevating the urgency of longer-term funding questions. The most immediate factor cited by analysts is the Supreme Court's decision overturning the use of the International Emergency Economic Powers Act (IEEPA) for broad tariffs. That shift could prompt refunds to importers totaling as much as $166 billion.
JPMorgan estimates that roughly $127 billion of that amount will be eligible for electronic refunds, and that the first meaningful payments are likely to arrive in June and July after a 60- to 90-day processing window. The bank further expects about $30 billion in refunds to be paid in 2026 and the remaining $90 billion or so in 2027. In light of these developments, JPMorgan raised its fiscal deficit forecast for the year to $1.98 trillion from a prior estimate of $1.875 trillion.
The timing of refund payments complicates the Treasury's usual issuance cadence. June typically sees a pullback in bill issuance as corporate tax receipts bolster the Treasury General Account, the government's account at the Federal Reserve. The second quarterly estimated tax payment is due June 15, which historically affects the Treasury's short-term funding needs.
Borrowing projections and market implications
Analysts' borrowing projections reflect the interplay between the tariff refunds and seasonal cash flows. JPMorgan projects net marketable borrowing of $149 billion in the April-June quarter, predicated on an end-June Treasury General Account balance of $900 billion, consistent with prior Treasury guidance. Looking ahead to the July-September quarter, the bank sees borrowing rising sharply to $792 billion as refund payments and seasonal patterns converge.
Citi's estimates are broadly similar. The bank sees private funding needs of $126 billion for the current quarter and $735 billion for the third quarter. Citi also flags a risk that second-half financing requirements could be larger if defense outlays increase.
Dhiraj Narula, U.S. rates strategist at HSBC, anticipates that if the Treasury proceeds with larger coupon auctions, most of the increases will be concentrated at the front end and the belly of the curve - covering maturities out to seven years - with only modest upticks at the long end, or maturities of 10 years and longer.
T-bill issuance has met much of the Treasury's funding needs in recent years because of robust demand for short-term paper. But Narula cautioned that extended reliance on T-bills could leave government funding costs more exposed to swings in short-term interest rates. He warned that waiting too long to scale up coupon supply "might risk the need for larger catch-up increases, which could drive up term premium and ... steepen the curve." Term premium refers to the additional yield investors demand to hold longer-term debt.
What markets will watch next
Market participants will scrutinize the Treasury's May 4 financing update and the May 6 refunding announcement for signs of when and how the government plans to balance shorter-term bill issuance against potential increases in coupon supply. With large tariff refunds possible and seasonal tax flows affecting the Treasury's cash position, the timing and scale of any future shift toward greater long-term issuance will remain a central question for rates markets and for institutions that underwrite and invest in government debt.