An oil shock arrives in the middle of a bond rout
The long end is now absorbing an inflation shock while the only official tool pointed at it is a liquidity backstop that cannot change duration supply.
Brent rose 1.7% to $92.1 a barrel on Tuesday and only five ships transited the Strait of Hormuz. Wheat hit a three-and-a-half-year high on attacks in the Black Sea. Long bonds sold off worldwide: the 30-year gilt jumped 9bp to 5.88%, its highest since March 1998, and the 10-year gilt reached its highest since June 2008 (Guardian). The US 10-year broke above 4.75% and the 5-year above 4.50% on Monday, both for the first time since January 2025. The 30-year Treasury sits at 5.26%, having closed above 5% on 55 days this year — the most since 2006 (Bloomberg). The plumbing matters here. Treasury's response to the earlier long-end move was to double liquidity-support buybacks from $2bn to at least $4bn per operation, starting 9 September and running to 4 November, funded out of a Treasury General Account near $1tn. That is a market-functioning tool: it buys illiquid off-the-run bonds to keep dealers able to make prices. It does not change the supply of duration, and it does nothing about an inflation impulse. The first announcement bought a day of relief before yields round-tripped. What makes this configuration different from the last fortnight is the direction of the Fed. Kevin Warsh told Jackson Hole that 2% is a "firm and fixed target" and that "we still have work to do." An energy shock into a central bank that has already priced out easing, with a hike live for 16 September, is the one combination in which the long end and the front end can rise together. Both did. Against that: no failed auctions, no dealer balance-sheet seizure, no forced unwinds. This is repricing, not breakage.