(Corrects typo in headline) Sterling faces increased volatility as a convergence of domestic political uncertainty and deteriorating geopolitical expectations threaten to deepen the currency's current retreat. Prime Minister Keir Starmer defied calls to resign, telling ministers he would get on with governing despite a "destabilising" 48 hours of growing calls to set out a timetable for his departure after a drubbing in local elections.

These political fractures, combined with diminishing hopes for a U.S.-Iran peace deal after Iran rejected the latest U.S. proposal, have effectively sapped sterling bulls of their recent vigor.

The technical picture is equally precarious. GBP/USD has failed to sustain gains in the mid-1.36s, tumbling through the rising 10-DMA at 1.3565 and prior support at 1.3543. Today's dip into the daily cloud has shifted momentum, putting the 100-DMA support at 1.3484 firmly in focus as bears gain control of the price action.

Fundamental pressures are mounting via the debt markets; rising long-term gilt yields reflect growing fiscal anxiety that a potential shift in government could lead to an unfunded spending spree, straining the UK’s financial position. Furthermore, resurgent oil prices and hot U.S. CPI data serve as a grim preview for UK inflation. This leaves the Bank of England in an increasingly awkward position, forced to navigate stagnant growth against a backdrop of rising prices. Unless the pair can rally above the 21- and 10-DMAs, recent support near 1.3550, the path of least resistance remains toward late-April lows by the rising 100-DMA at 1.3484, the 200-DMA at 1.3425 and then the daily cloud base at 1.3295.
Sterling Chart:


(Paul Spirgel is a Reuters market analyst. The views expressed are his own)