US stock markets fell on Thursday as investors turned cautious after the previous session’s rally, while rising oil prices and geopolitical tensions weighed on sentiment.The Dow Jones Industrial Average dropped 801 points, or 1.6 per cent, dragged down by losses in stocks such as Caterpillar and Goldman Sachs. The S&P 500 declined 0.9 per cent, while the Nasdaq Composite fell 0.6 per cent.The selloff came as crude oil prices jumped to their highest level since June 2025 after Iran said it had struck an oil tanker with a missile. US West Texas Intermediate crude futures surged 6 per cent to trade above $79 per barrel, while international benchmark Brent crude futures rose about 3 per cent to more than $84 per barrel. Oil prices had stabilised in the previous trading session.Markets had rallied on Wednesday, supported by gains in technology and semiconductor stocks. The Dow had snapped a three-day losing streak, while the S&P 500 and Nasdaq Composite ended the session with solid gains.Despite the ongoing US-Israeli air campaign against Iran, US markets have performed relatively better than European and Asian counterparts this week, largely supported by a rebound in technology stocks that had been hit hard during February’s selloff.The tech-led recovery in the previous session helped the Nasdaq erase its weekly losses, putting the index on track to end the week in positive territory if gains hold through Friday.Investors remain concerned that prolonged disruption to shipping through the Strait of Hormuz — a key global energy corridor –could push oil prices higher and add to inflationary pressures through rising energy and shipping costs.Markets are particularly wary of crude prices moving towards $100 per barrel, which could complicate the Federal Reserve’s efforts to control inflation while considering interest-rate cuts.“For the past couple of years, bringing inflation down has been the Fed’s entire focus, and they were finally making progress. But if energy stays expensive, inflation could start climbing again and that would force the Fed to rethink its plans,” said Adam Sarhan, chief executive of 50 Park Investments, Reuters quoted.According to data compiled by LSEG, investors are increasingly expecting the Federal Reserve to delay a 25-basis-point interest rate cut to September from the previously anticipated July timeline.Among sectors, healthcare led declines on the S&P 500, dropping 1.6 per cent. The energy index, however, gained 0.7 per cent, with shares of ConocoPhillips and Valero Energy rising about 2 per cent each.The CBOE volatility index (VIX), widely seen as a gauge of market fear, rose 0.9 points to 22.08, reflecting cautious investor sentiment. The small-cap Russell 2000 index fell 1 per cent.Travel and tourism stocks, which are sensitive to fuel costs, were under pressure. Delta Air Lines slipped 3.3 per cent, while Royal Caribbean Cruises declined 0.6 per cent.On the other hand, some travel booking companies rallied sharply. Booking Holdings jumped 11 per cent and Expedia surged 8 per cent after a report by The Information said OpenAI was scaling back on-platform shopping checkout plans for ChatGPT, easing concerns about disruption to online marketplace businesses.Chip stocks showed mixed performance. Nvidia edged down 0.3 per cent, while Marvell Technology gained 1.3 per cent.Shares of Broadcom rose 2.9 per cent after the chip designer projected that its artificial intelligence chip revenue could exceed $100 billion next year.Elsewhere, Trade Desk surged 22.5 per cent following a report that OpenAI had held early discussions with the advertising technology company regarding the sale of advertisements.Economic data released on Thursday showed the number of Americans filing new applications for unemployment benefits remained unchanged last week.Investors are also awaiting remarks from Federal Reserve Vice Chair Michelle Bowman later in the day, ahead of the closely watched non-farm payrolls report due on Friday.On the New York Stock Exchange, declining stocks outnumbered advancers by a ratio of 2.48-to-1, while on the Nasdaq the ratio stood at 1.63-to-1.The S&P 500 recorded four new 52-week highs and two new lows, while the Nasdaq Composite registered 17 new highs and 33 new lows.