The peace deal collapses, and oil jumps

Front-month Brent rose 16 per cent in five trading sessions to $88 a barrel after Middle East peace talks broke up without an agreement on 28 July. The truce is over, and fears of stagflation are back across financial markets, rather sooner than most investors had expected.

Inflation swaps reprice

Bond desks moved at once to reprice inflation swaps for a Persian Gulf closed to shipping again. One- and two-year inflation swaps rose by more than 35 basis points in a single week, ending whatever hope remained of a Fed rate cut in the autumn. Government bonds took heavy duration losses as trading algorithms sold long positions in benchmark Treasuries.

The damage was heaviest at the short end for a mechanical reason. An inflation swap pays one side realised consumer-price inflation in return for a fixed rate agreed today, and petrol and diesel prices reach the headline index within weeks of a move in crude. An oil shock therefore lands mostly in the next year or two of fixings, while longer tenors depend on whether it spreads into wages and services. Paying fixed on a one-year swap is a bet on the next few inflation prints, and that bet has become a good deal more expensive.

From tanker to Treasury

The chain from the Gulf to the bond market is short. Refiners bid for prompt cargoes, wholesale fuel prices follow within days, and higher expected inflation raises the path of interest rates that traders think the Fed will need. Front-end yields rise with that path and the prices of existing bonds fall, with the longest maturities losing most because each rise in yield is applied to more years of coupons. Systematic funds that trade on momentum and volatility add to the selling once prices start to move, which helps explain why the losses arrived so quickly.

The winners are easy to list: producers outside the Gulf, energy shares, and the currencies of exporters such as Norway and Canada. Holders of inflation-linked bonds have been paid for exactly the risk that arrived. The losers are oil importers from Japan to the euro area and India, along with airlines, chemical makers and every floating-rate borrower who had been counting on cheaper money this autumn. Gulf producers without a route around the strait gain nothing from a higher price on barrels they cannot ship.

The peace discount disappears

The 16 per cent jump shows that the sub-$80 prices seen earlier in the month rested on diplomatic wishful thinking and speculative money. With tankers once again barred from the Strait of Hormuz, the shortage of physical barrels has reasserted itself over paper futures. Positions built on the hope of a settlement had to be unwound in a hurry, which probably accounts for much of the speed of the rise.

The best argument against a lasting shock is that geopolitical spikes often fade faster than the forecasts built on them. Saudi Arabia can pipe part of its output west to the Red Sea, the United Arab Emirates has a pipeline to Fujairah outside the strait, and importing countries hold strategic stocks for this contingency. High prices also curb demand, and a return to the table could strip out the premium as fast as it arrived. Even so, the bypass pipelines carry only part of the usual traffic, and while ships stay in port the physical shortage sets the price.

Currencies take sides

Currency markets carry the same message. Crude is priced in dollars, so an importer's bill rises twice when oil climbs and its own currency weakens against the dollar at the same time. Japan showed the pattern in 2022, when a swelling energy import bill and a widening gap between American and Japanese interest rates drove the yen to its weakest level in more than three decades and pushed the finance ministry into its first yen-buying intervention since 1998. The currencies of exporters move the other way, since every dollar added to the price of a barrel widens their trade surplus.

A Fed short of patience

Textbook central banking says a supply shock should be looked through, because tighter policy cannot conjure more barrels and only adds unemployment to the loss of real income that dearer fuel already imposes. The Fed has less credit for that argument than it once did. In 2021 it called rising inflation transitory and was then forced into its fastest tightening since the early 1980s, and officials who lived through that episode are slow to trust any promise that a price jump will fade by itself. Swap traders are pricing a central bank that would rather be late with a cut than early, which is why the repricing was so abrupt.

Echoes of 1990 and 2022

History offers two endings. When Iraq invaded Kuwait in August 1990, crude roughly doubled within three months and then fell sharply once the air campaign began in January 1991, hurting an American economy already sliding into recession but leaving no lasting inflation. After Russia invaded Ukraine in 2022, Brent briefly traded above $130, and the Fed, which had begun raising rates only that March, lifted them by 75 basis points in June. The difference lay in how long the supply loss lasted and whether wages were already rising when it hit.

The markers that would change the call are plain enough. Tanker movements through the strait, the next two consumer-price reports and the Fed's September meeting will show whether the shock stays in fuel prices or seeps into core goods, services and pay. Long-dated gauges such as the five-year, five-year forward inflation rate matter more than the one-year swap, because if they hold steady the Fed can treat the jump as a supply shock and wait. The failed talks have ended hopes of an autumn rate cut, and until tankers move through Hormuz again, bond markets will have to price in higher inflation for longer.