The ongoing war involving the United States and Israel against Iran has triggered substantial declines in stock markets across the United States, Europe, Japan, and the Gulf region. With heightened concerns over the potential implications of this conflict, the opening of the market on Monday saw the S&P 500 futures plummet by 1.5% and the Nasdaq by 1.9%. The turmoil has raised alarms regarding oil supply, driving the price of crude oil to exceed $82 per barrel as fears about shipping routes through the Strait of Hormuz grow, where approximately 20% of the world's oil supplies transit.

In Europe, the negative sentiment continued to dominate, resulting in a fall in stock prices while boosting shares in energy and defense sectors. The Stoxx 600 European index witnessed a drop of 1.8%, reaching its lowest point since mid-February. The decline is attributed to market jitters over the wider implications of escalating conflict, showcasing a reversal from the all-time high recorded just last Friday. As various sectors took a hit, energy investments saw a notable increase, reflecting the market's response to rising oil prices.

The significant spike in shares of major energy companies such as Shell, BP, and TotalEnergies—each climbing by over 5%—illustrates investors' strategic adjustments amid surging oil prices, which have risen by approximately 13%. This situation indicates a market increasingly wary of geopolitical tensions impacting essential commodities, highlighting the interconnectedness of regional conflicts with global economic stability and investor sentiment.