Trend-following hedge funds are carrying their largest-ever bearish exposure to global government bonds, increasing the potential for a sharp reversal if this week’s US inflation data weakens expectations for further Federal Reserve rate increases, according to a report by Bloomberg.
Commodity trading advisers (CTAs), which use systematic strategies to follow market momentum, tripled their underweight bond positions in the second half of July, according to UBS. The positioning has remained broadly unchanged since then, leaving the funds vulnerable if the latest consumer and producer price data trigger a rally in fixed income.
UBS estimates that CTAs are currently positioned to gain or lose roughly $300m for every one-basis-point move in 10-year Treasury yields. That is the largest sensitivity recorded in the bank’s data, which stretches back to 1990.
The scale of the trade is raising the stakes around Wednesday’s US consumer price index release. A softer-than-expected inflation reading could strengthen the case for the Federal Reserve to hold off on raising interest rates in September, potentially forcing systematic funds to unwind some of their bond shorts.
Global bond yields have risen in recent months as higher oil prices, expectations of tighter monetary policy and concerns over government borrowing have weighed on fixed income. The US 30-year Treasury yield reached its highest level since 2007 last month and remained around 5.25% on Tuesday.
CTAs, which collectively manage more than $400bn, have followed the bond selloff by increasing their short exposure. But the increasingly crowded positioning could become a source of support for bonds if the trend reverses.
“There’s not a lot of room to add to short positions,” said Phoebe White, head of US rates strategy at UBS. She described the risk as asymmetric because a bond rally could encourage funds to cover existing shorts, while further weakness offers less scope to increase bearish positions.
Wednesday’s CPI release is therefore emerging as a key test. Interest-rate swaps currently imply roughly even odds of a 25-basis-point Federal Reserve rate increase in September, leaving markets particularly sensitive to any surprise in the inflation data.
UBS recently recommended clients buy two-year Treasury notes following a weaker-than-expected employment report. White and her colleagues cited evidence that inflation may have peaked, together with crowded short positioning, as factors supporting the trade.
Bank of America strategists have similarly identified substantial bearish CTA exposure, particularly in shorter-dated Treasury notes. They warned that an inflation reading that fails to reinforce expectations of a September rate increase could trigger a reversal of the crowded positioning.
The broader rates market is also showing signs of caution. JPMorgan’s latest Treasury client survey found investors had moved to a neutral stance in the week ending 10 August, abandoning a net-long position that had been the smallest since May.
Options markets are also reflecting shifting expectations. Trading in SOFR options has concentrated around several strikes in the September 2026, December 2026, and March 2027 contracts, while the most heavily held call positions remain substantially larger than puts in the September and December contracts.
