SynopsisUS stocks declined on Monday as oil prices surged. This jump revived inflation concerns and increased monetary policy tightening expectations. Investors processed hawkish comments from Federal Reserve Chair Kevin Warsh. Despite the day's losses, major indexes posted monthly gains for August. Financial markets anticipate a potential rate hike at September's meeting.ReutersU.S. stocks weakened on Monday, with Wall Street turning the page on a volatile month as a war-related jump in crude prices revived inflation fears and raised the likelihood of tighter monetary policy.According to ​preliminary data, the ​S&P 500 lost 27.39 points, or ⁠0.36%, to end at 7,684.37 points, while the Nasdaq Composite lost 41.51 points, or 0.16%, to 26,360.91. The Dow Jones Industrial Average fell 380.22 points, or 0.71%, to 53,179.77.Spiking oil prices dampened investor risk appetite and sent benchmark U.S. Treasury yields higher, as investors processed U.S. Federal Reserve Chair Kevin Warsh's hawkish tone on Friday in his ‌speech at the Jackson ⁠Hole Symposium.While ⁠a broad sell-off sent all three major U.S. stock indexes lower, they all posted monthly gains. The Nasdaq showed the largest percentage growth for August as ​the AI trade remained alive, despite recent weakness. The blue-chip Dow nabbed its fifth consecutive monthly advance."We heard from Warsh last week, and the ​odds now favor a rate hike in September," said Peter Tuz, president of Chase Investment Counsel in Charlottesville, Virginia. "Throw that into the mix of continued hostilities in the Middle East."And the week before Labor Day, there's not a lot of people who are out ​of the office, so weird things can happen," Tuz added. "There was no reason to ⁠come into ‌work today thinking it's a great day to buy stocks."Iran's President Masoud Pezeshkian said Tehran is still seeking ​a negotiated solution ​to the war, after days of renewed airstrike exchanges and mounting hostilities following U.S. President Donald Trump's ⁠implementation of costly economic sanctions.The protracted impasse and the related closure of the Strait of ​Hormuz is fueling fears that upward pressure on energy prices could metastasize into broader, ​systemic inflation that could force the Fed to hike interest rates as soon as next month.Financial markets are currently pricing in more than a 65% likelihood of the central bank implementing a 25-basis-point rate hike at the conclusion of September's monetary policy meeting, according to CME's FedWatch tool."Investors are revisiting some of the comments that Warsh made at Jackson Hole as well and what that may mean for interest rates, what that may mean for inflation," said Paul Nolte, senior wealth advisor & market strategist at Murphy & Sylvest ‌in Elmhurst, Illinois. "If they do not hike rates in September, I think you will see a dramatic reaction in the markets because it's been prepped now for quite some time that they're going to raise rates."Among the 11 major sectors in the S&P 500, energy shares showed solid gains, with a ​boost from surging crude prices . Utilities lagged on the heels of an amendment to a bill in the California senate, which did little to solve grid operators' exposure to wildfire liabilities.Within the energy space, Halliburton and Valero Energy advanced. In utilities, California's PG&E suffered its largest percentage loss in over six years.In other movers, GameStop's shares rose after the company said it would pay about 27% of a previously announced $1.4 billion debt exchange through cash on hand instead of issuing new stock, preventing further share dilution.Read More News on(What's moving Sensex and Nifty Track latest market news, stock tips, Budget 2025, Share Market on Budget 2025 and expert advice, on ETMarkets. Also, ETMarkets.com is now on Telegram. For fastest news alerts on financial markets, investment strategies and stocks alerts, subscribe to our Telegram feeds .) Subscribe to ET Prime and read the Economic Times ePaper Online.and Sensex Today. Top Trending Stocks: SBI Share Price, Axis Bank Share Price, HDFC Bank Share Price, Infosys Share Price, Wipro Share Price, NTPC Share Price...moreless(You can now subscribe to our ETMarkets WhatsApp channel)Read More News on(What's moving Sensex and Nifty Track latest market news, stock tips, Budget 2025, Share Market on Budget 2025 and expert advice, on ETMarkets. Also, ETMarkets.com is now on Telegram. For fastest news alerts on financial markets, investment strategies and stocks alerts, subscribe to our Telegram feeds .) Subscribe to ET Prime and read the Economic Times ePaper Online.and Sensex Today. Top Trending Stocks: SBI Share Price, Axis Bank Share Price, HDFC Bank Share Price, Infosys Share Price, Wipro Share Price, NTPC Share Price...moreless