Legal & General Group shares plunged, becoming the worst performer in the FTSE 100 index following its full-year results, which fell short of market expectations on several key metrics. The sharp decline reflects investor disappointment with the insurer's performance, particularly concerning its investment returns and capital allocation strategy. Analysts highlighted the shortfall in meeting revenue projections and cost control targets, undermining confidence in the company's ability to navigate current market challenges and regulatory pressures.

The sell-off underscores the market's sensitivity to underperformance by major FTSE constituents, potentially signaling broader caution among investors regarding the UK financial sector's resilience.