FTSE 100 set for worst week of 2025.

FTSE 100 on Track for Worst Week of 2025 Amid US Tariff Uncertainty

The FTSE 100 is set for its worst weekly performance since December, as investor caution persists amid growing uncertainty over US tariffs.

UK stocks declined another 0.6% today, bringing the index close to a 2% drop for the week.

Diageo shares fell as much as 3.1% following backlash from pubs over its decision to increase Guinness draught prices by 4.2% starting in May. Defending the price hike, a Diageo spokesperson stated:

“We have today informed our on-trade customers of a Cost Price Increase (CPI) on Guinness Draught products. Guinness is a high-quality beer that drives footfall for the hospitality sector, and this CPI allows us to sustain investment in and continue growing the Guinness brand.”

Schroders also tumbled by up to 5%, paring some of Thursday’s 12.6% rally, after the asset manager announced plans to cut costs.

Oil giants Shell and BP weighed heavily on the FTSE 100 throughout the week, while defence companies BAE Systems and Rolls-Royce emerged as the top performers, boosted by increasing calls for higher defence spending.

Richard Hunter, head of markets at Interactive Investor, highlighted the impact of trade uncertainty, stating:

“Markets hate uncertainty, and investors are facing it in abundance. The ever-changing tariff stance from the White House is testing patience, as each shift carries different implications for the deeply interconnected global economy.”