Tariff uncertainty weighs on FTSE 100, opens slightly lower on Monday

⑴ The FTSE 100 Index fell by 0.2% in Monday trading, after the UK benchmark index had just recorded its best weekly performance of the year. A new round of tariff uncertainties weighed on market sentiment. ⑵ Trade policy confusion has once again become the focus, after the Supreme Court overturned President Trump's reciprocal tariff policy, prompting him to announce a 10% global tariff, which was then raised to 15%. The wavering policy stance left markets uneasy at the start of the week. ⑶ Stocks with high exposure to US tariffs led the declines, especially companies with a high proportion of overseas revenue. AstraZeneca, BAE Systems, and British American Tobacco were the main drags. Financial and mining stocks limited the losses, as safe-haven demand pushed up gold and silver prices. Fresnillo and Endeavour Mining rose.