Sterling's path of least resistance points lower, and today's slight 0.2% GBP/USD uptick to 1.3512 masks a bear market taking shape, as British fiscal uncertainty, persistent UK inflation and Middle East-driven oil gains stoke fears of stickier global inflation.

Today's modest bounce owes little to UK fundamentals and more to a shifting BoJ narrative, with markets pricing a more hawkish path. The 1.7% slide in GBP/JPY, per LSEG Matching, better captures the current GBP zeitgeist — signaling underlying weakness.

Although the Bank of England's rate path, as indicated by LSEG's IRPR, remains relatively hawkish in the near term, the longer end of the UK yield curve reveals nervousness about the country's fiscal outlook.

Rising long-end gilt yields underscore these concerns. The volatile situation in the Middle East, with disruptions to vital energy shipping in the Strait of Hormuz, is pushing oil prices higher. This, in turn, points to a "higher for longer" inflation scenario, which is likely to further strain UK economic prospects and amplify fiscal worries, even with high short-term interest rates this is likely to continue to add downward pressure to sterling as developed market policy rates converge.

The question for markets is how long the government of PM Andy Burnham will adhere to existing fiscal rules.

As interest rates in other developed economies converge with those in the UK, the yield advantage that previously supported sterling's rise to its recent 6-month high of 1.3675 against the dollar is diminishing. Without a significant UK-positive catalyst, such as falling gilt yields or lower inflation, GBP/USD faces further downside risk. Bears are gaining momentum, targeting late-July lows below 1.33, with the June 24 low at 1.3140 the next significant support level.
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(Paul Spirgel is a Reuters market analyst. The views expressed are his own)