The Treasury borrows less than feared, and bonds soar

The Treasury set its quarterly refunding at $112 billion, a modest total that put most of the future growth in borrowing into shorter maturities. Bond investors had braced for much bigger auctions of long-dated debt and were caught short. Yields fell across the curve, and the rally in long bonds was one of the sharpest in recent memory.

How the market got so short

The positioning had been building for three months. At its August refunding the Treasury increased the size of its longer-dated auctions for the first time since 2021, and the market read that as the start of a long run of heavier supply. The ten-year yield climbed from around 4 per cent to within a whisker of 5 per cent by late October, and hedge funds and macro traders piled into bets that it would go higher. Several long-dated auctions cleared with yield concessions, which seemed to confirm that buyers were exhausted.

By the end of October the consensus trade was crowded. When a position is that one-sided, even modestly good news can force a scramble to close it, since the traders who sold bonds they did not own must buy them back. That is what made the refunding such a powerful catalyst.

Smaller auctions, lower yields

By holding coupon auction sizes down, the Treasury stopped the bond sell-off in its tracks. Signs of softer demand for labour and dovish remarks from Jerome Powell added to the relief, and macro funds scrambled to cover their short positions. When the government is borrowing this heavily, guidance on supply can move yields as much as a decision on interest rates.

The sequence of news helped. The Treasury's borrowing estimate on 30 October came in below forecasts, the refunding statement on 1 November raised coupon sizes by less than dealers expected and indicated that one more quarter of increases would probably be enough, and the Fed held rates unchanged the same afternoon. Two days later the October jobs report showed payrolls rising by 150,000 and unemployment up to 3.9 per cent. Each piece pushed in the same direction, and the ten-year yield fell by more than a quarter of a percentage point over the week.

Why supply moves prices

The mechanism is the term premium, the extra return investors demand for holding long bonds instead of rolling short-term bills. When the Treasury sells more long-dated debt, private investors must hold more duration risk, and they want to be paid for it. Fewer long bonds and more bills shift that risk towards money-market funds, which are happy to hold short paper yielding more than 5 per cent. The expected path of policy rates barely changed during the week; most of the fall in long yields came from the term premium coming down.

The tilt towards bills has a ready market. Money-market funds kept a large pile of cash at the Fed's overnight reverse repo facility after the debt-ceiling standoff ended in June, and they have been moving it into Treasury bills as issuance rose, since bills pay slightly more. Because that cash was sitting idle, heavy bill sales have absorbed it without pushing up short-term rates or squeezing bank reserves. The Treasury's own advisory committee of dealers and investors has long recommended keeping bills at roughly 15 to 20 per cent of marketable debt, and heavier bill issuance pushes towards the top of that range. The strategy therefore works only as long as the reverse repo pile lasts, which gives it a natural limit.

There is precedent for this. On 31 October 2001 the Treasury announced it would stop selling 30-year bonds, and long yields fell sharply that day. Supply announcements have moved prices before, but they matter most when deficits are large and the Fed is no longer buying, both of which describe today.

Who gained

The rally helped almost everyone who had been hurt by the sell-off. Holders of long bonds, from insurers to the banks nursing unrealised losses, saw their portfolios recover some value. Mortgage rates, which had approached 8 per cent, eased. Equities had their best week of the year as the discount rate applied to future earnings fell. The losers were the traders who had bet on higher yields, and to a lesser extent savers hoping to lock in 5 per cent on long bonds.

The case against a lasting rally

The fundamentals have not changed. The deficit remains very large for an economy near full employment, the Fed is still shrinking its balance sheet, and the Treasury has only postponed rather than cancelled the growth in long-dated supply. Shifting borrowing to bills means more debt resetting at the policy rate and a larger refinancing need next year. If the economy stays strong and inflation proves sticky, yields could climb back quickly once short positions are closed and the relief fades.

That caveat is important, and it is why the rally should be read as a correction of an overcrowded trade rather than a turn in the long-term trend. The next tests arrive quickly: this week's auctions of ten- and thirty-year bonds, the October consumer-price figures due next week, and the Treasury's next refunding in early February, when it will say whether it still expects no further increases in coupon sizes.

The smaller refunding set off a rally for the history books. For now, the Treasury's borrowing plans matter more to bond prices than anything the Fed says, and investors will read each refunding statement as closely as the Fed's minutes, starting with the February announcement that will decide whether this rally holds.