WASHINGTON, July 11 — The United States Treasury’s borrowing machinery is a vast, almost invisible engine of state, and the detail that matters is the yield on a 10-year note. As of July 2024, that yield sat at around 4.2 percent, a sharp climb from the roughly 1.5 percent seen in 2021. This is the interest rate the government pays to borrow for a decade, and it is set not by fiat but by the auction process run by the Treasury’s Bureau of the Fiscal Service.
The technical reality of how the Treasury funds itself is a story of regular, high-stakes auctions. The Bureau issues marketable securities — Treasury bills maturing in up to a year, notes maturing in two to ten years, and bonds maturing in twenty or thirty years.
These are sold at regular auctions open to primary dealers, the large financial institutions authorised to bid directly, as well as to smaller investors through the TreasuryDirect system. The auction itself determines the yield, which is the price of borrowing. Under the hood, the scale of this operation is considerable.
For fiscal year 2024, the Treasury’s monthly borrowing averaged $155 billion. That figure, detailed in the Treasury’s quarterly refunding announcements, is an average; actual borrowing fluctuates based on tax receipts and spending.
The Treasury’s cash balance, held at the Federal Reserve, is managed day-to-day to meet payment obligations. The legal authority for all this borrowing comes from the federal debt limit, which was suspended in June 2023 under the Fiscal Responsibility Act. That suspension runs through January 1, 2025.
Until then, the Treasury can issue securities without the periodic brinkmanship over the debt ceiling that has become a feature of Washington fiscal politics. Beyond the standard bills, notes and bonds, the Treasury also issues Treasury Inflation-Protected Securities, known as TIPS, and Floating Rate Notes, or FRNs. These instruments offer investors different forms of protection or yield adjustment, and they are part of the broader borrowing programme detailed in the quarterly refunding statements and the Monthly Treasury Statement.
The Auction Mechanism
The auction process is the core of the system. Primary dealers, a select group of financial institutions, bid directly. Other investors participate through TreasuryDirect.
The yield that emerges from each auction is the rate the government must pay. For the 10-year note, the benchmark for so much of global finance, that yield has moved sharply: from around 1.5 percent in 2021 to about 4.2 percent as of July 2024.
That rise reflects the Federal Reserve’s interest rate increases, but the Treasury’s borrowing costs are set by the market at each auction. The quarterly refunding announcements detail the amount and types of securities to be issued, giving the market a clear schedule of supply.
The Fiscal Context
The $155 billion monthly average for fiscal year 2024 is a number that sits at the intersection of tax policy, spending, and the debt limit. The Treasury’s cash balance at the Fed is managed to meet daily payment obligations, and the actual borrowing varies month to month. The suspension of the debt limit in June 2023, under the Fiscal Responsibility Act, removed one source of uncertainty for the Treasury’s borrowing programme, at least until January 1, 2025.
As ever, the detail that matters is the yield. For investors, the 10-year Treasury note is the risk-free benchmark.
For the government, it is the cost of carrying the national debt. The auction process, the primary dealers, the TreasuryDirect platform — these are the mechanisms that keep the engine running. The next quarterly refunding announcement will provide the next set of numbers, and the market will watch the yield.
