Global stock markets experienced significant volatility, driven by heightened concerns regarding U.S. trade policy.

On Tuesday, London’s FTSE 100 index fell by 104.23 points, or 1.21%, closing at 8,495.99, marking its lowest level since mid-January.

The decline was influenced by U.S. President Donald Trump’s announcement to double proposed tariffs on Canadian steel and aluminum imports to 50%.

This move contributed to a pervasive negative sentiment among investors.

The U.S. market showed similar trends, with the S&P 500 down by 1.1% and the Dow Jones Industrial Average falling by 1.5% by the close of European markets.

European equity markets followed suit; Germany’s DAX index saw a drop of 1.29%, while France’s CAC 40 declined by 1.31%.

The ongoing sell-off on Wall Street has prompted concerns that the trade disputes initiated by President Trump are eroding market confidence.

Market analysts suggested that immediate hopes for a recovery in stock prices had been diminished.

Industry experts noted that the increased tariffs could have broader implications for market growth, particularly in light of Ontario's implementation of a 25% tariff on electricity exports to the U.S.

In currency markets, the British pound strengthened against the U.S. dollar, increasing by 0.45% to a four-month high of 1.2935. However, it fell by 0.4% against the euro, trading at 1.184.

In corporate news, Domino’s Pizza reported an increase in sales and underlying profits for 2024, attributed to new store openings, though pre-tax profits declined on a statutory basis due to an uncertain economic environment.

Despite a rise in sales, shares of Domino’s fell by 3.6%.

Conversely, housebuilder Persimmon indicated optimism by increasing its sales targets for 2025, following early signs of recovery in the housing market.

Shares in Persimmon rose by 5.5% as it targets up to 11,500 home sales this year, surpassing 2024's total of 10,664, yet still below pre-rate hike levels.

The top gainers on the FTSE 100 included Persimmon, up 64p to 1,234.5p, London Stock Exchange Group, up 360p to 11,055p, Rolls-Royce, up 14.6p to 747.4p, Barratt Developments, up 8.1p to 434.9p, and Fresnillo, up 15.5p to 854p.

In contrast, the biggest losers included International Airlines Group, down 19p to 291.5p, Rentokil, down 15.4p to 323.4p, Intertek, down 210p to 4,960p, Diploma, down 166p to 4,016p, and Spirax, down 275p to 6,750p.

UK steel and aluminum industries are bracing for the impact of the newly imposed tariffs, which are set to take effect immediately.

The UK government remains cautious about retaliatory measures, emphasizing a cool-headed approach while engaging with U.S. officials to protect British industry interests.

Approximately 5% of UK steel exports and 6% of aluminum exports by volume target the U.S., although some industry leaders estimate that the U.S. market accounts for roughly 10% of aluminum exports valued at £225 million.

UK industry representatives have voiced concerns that the tariffs could lead to significant repercussions, with potential negative effects on domestic production and recycling capacities.

Following discussions between UK officials and U.S. counterparts, the UK government has committed £2.5 billion to support the steel industry and related communities.

Industry experts assert that these tariffs would have detrimental effects on competitiveness, particularly as manufacturers face rising energy costs and complex regulations.