“The conflict now looks likely to last far longer than many had hoped, and oil prices are escalating as a result,” said Kristina Hooper, chief market strategist at financial firm Man Group in New York. “It raises the question of whether the Fed will even be able to cut rates.”The Dow Jones Industrial Average fell 0.95% to 47,501.55 points, posting its steepest weekly percentage drop since early April 2025.
The S&P 500 lost 1.33% to 6,740.00 points and had its worst week since mid-October. The Russell 2000 recorded its sharpest weekly fall since early August.
The Nasdaq Composite slipped 1.59% to 22,387.68.
Oil prices jumped, driven by the U.S.-Israeli military attack in Iran, which halted shipping through the Strait of Hormuz, and by warnings from Qatar that crude could surge to $150 a barrel. U.S. crude oil futures climbed more than 12% on Friday, to more than $90 per barrel, while international Brent rose about 8.5% to $92 per barrel.
“We are marching closer each day to $100 a barrel of oil, and that has caused much greater volatility and anxiety,” said Michael Arone, chief investment strategist at State Street Investment Management.
The Cboe Volatility Index, Wall Street’s most-watched gauge of investor anxiety, jumped 5.74 points to 29.49, its highest close since April 2022.
The increase in oil prices fueled expectations of higher input costs and pressure on corporate profits, adding to the likelihood of weaker credit conditions, which is typically negative for lenders.
The S&P 500 Banks Index, which tracks major U.S. bank stocks within the S&P 500, fell 2.03%.
BlackRock fell 7.1% on a decision to limit withdrawals from a major private credit fund.
Lender Western Alliance fell 8.4% after suing Jefferies for not making a payment for loans tied to bankrupt auto parts supplier First Brands Group. Jefferies dropped 13.5%.
Signs of a weakening U.S. jobs market came amid a strike by healthcare workers and harsh winter weather. The unemployment rate increased to 4.4%.
Travel stocks lagged as fuel costs jumped, with the S&P Passenger Airlines Sub-Index, which follows passenger-carrier stocks, dropping 4.07%.
S&P energy stocks rose 0.13% due to the prospect that higher energy costs will bring stronger revenue.
Safe-haven asset gold gained 1.83%, while bitcoin slid 4.30%.
Among other stocks, chip company Marvell Technology closed 18.4% higher after forecasting fiscal 2028 revenue above estimates.
Volume on U.S. exchanges was 19.95 billion shares, compared with the 17.82 billion average for the full session over the last 20 trading days.