Stocks Dip as Iran Conflict Lifts Oil Above $90, Yields to 4.79%

U.S. Treasury yields climbed Tuesday as fresh military action between the United States and Iran drove oil prices higher and revived concerns about inflation and the Federal Reserve’s next moves. The benchmark 10-year note yield rose three basis points to 4.788 percent, its highest reading since January 14, 2025. The 30-year bond yield also advanced three basis points to 5.279 percent, while the two-year note edged up less than one basis point to 4.356 percent.

The moves followed reported U.S. strikes against Iranian targets and an attack on a tanker in the Strait of Hormuz. Traders have watched oil prices climb in response, with West Texas Intermediate futures trading above 87 dollars a barrel and Brent crude above 92 dollars. Those gains come after six months of conflict that has kept the Strait largely closed, tightening global supply and lifting energy costs that feed directly into consumer prices.

Higher oil prices are now feeding into broader inflation expectations at a moment when fiscal deficits remain large and companies continue to issue debt to fund artificial-intelligence projects. Analysts at UBS noted that the combination of geopolitical uncertainty, persistent fiscal concerns, and heavy Treasury supply has kept longer-term yields under pressure even as the economy shows signs of cooling. Mortgage rates, auto loans, and credit-card borrowing costs all track the 10-year yield, so the latest increase will raise monthly payments for households that need to refinance or take on new debt.

Equity markets reflected the same caution. Futures on the Dow Jones Industrial Average and the S&P 500 each fell about half a percent in early trading, while Nasdaq-100 contracts dropped roughly one percent. Investors appear reluctant to extend the solid gains recorded through August while the path for both energy prices and monetary policy remains unclear.

This week’s data releases will provide fresh clues. The Job Openings and Labor Turnover Survey on Tuesday will be followed by manufacturing readings from S&P Global and the Institute for Supply Management. Friday’s monthly employment report is expected to draw particular scrutiny, as any sign of renewed hiring strength could reinforce expectations that the Fed might delay rate cuts or even consider additional hikes. Corporate earnings from Dell and Palo Alto Networks will also offer a window into technology spending, an area that has supported growth but now faces higher financing costs.

The interplay between the Middle East conflict and domestic policy choices has left markets pricing in more volatility than they did just a few months ago. With no immediate resolution in sight for the Strait of Hormuz and with Treasury issuance set to remain heavy, borrowing costs are likely to stay elevated even if the Fed eventually moves. That outcome would affect everything from housing affordability to corporate investment plans, illustrating how distant geopolitical events can reshape the everyday cost of credit inside the U.S. economy.