FTSE 100 Stuck in Range as Political Crisis Adds to Breakout Uncertainty

The FTSE 100 is struggling to escape a stubborn trading range, with political turbulence in Westminster now threatening to extend the index’s months-long consolidation just as investors were beginning to eye fresh highs.

Britain’s blue-chip benchmark sits at around 10,363, pinned broadly between support near 10,190 and resistance at the 10,55700–10,570 band — a zone that has capped gains since April.

Composite technical signals read “Strong Sell,” with the index trading below key moving averages and momentum indicators failing to generate a convincing bullish impulse.

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The macro backdrop has been mixed. The Bank of England recently held rates steady, keeping sterling under modest pressure. Traders are currently pricing in a higher-for-longer approach.

Commodity stocks, which carry heavy index weighting, are acting as a drag. Antofagasta and Fresnillo both declined last week as metals prices retreated, underscoring how closely FTSE 100 direction tracks global commodity cycles.

Now a domestic political shock has entered the equation. Andy Burnham’s commanding by-election victory in Makerfield on 19 June — securing roughly 55% of the vote — handed the Greater Manchester Mayor a parliamentary seat and an explicit mandate to challenge Prime Minister Keir Starmer for the Labour leadership.

Starmer has previously insisted he will not “walk away,” but ministers are openly acknowledging he is weighing “political realities,” and Trump posted on Truth Social this weekend that Starmer will step down.

Markets face the prospect of a prolonged leadership contest, complicating the government’s fiscal and growth agenda at a delicate moment.

For the FTSE 100, a decisive close above 10,570 remains the trigger analysts are watching for a trending move back towards its highs. Until that level breaks, rangebound volatility — amplified by uncertainty — looks set to persist.