US stock futures fell on Tuesday as rising tensions between the US and Iran revived inflation concerns, with elevated oil prices adding pressure.

Futures on the Dow Jones Industrial Average (YM=F) were flat, while those on the S&P 500 (ES=F) declined 0.4%. Contracts for the Nasdaq-100 (NQ=F) retreated 1.1%, leading the major indexes lower after a downbeat start to the trading week.

Oil prices climbed to their highest level in over two weeks after President Trump said he intends to inflict more economic pain on Iran and threatened to "bomb" Oman if it interferes with the US's plans for the Strait of Hormuz.

Brent crude (BZ=F) futures, the international benchmark, hit $91 per barrel, and US benchmark West Texas Intermediate crude futures (CL=F) rose to $84 per barrel as the US Strategic Petroleum Reserve plunged to its lowest level since 1982.

Rising oil, an AI borrowing spree, and concerns over government borrowing have also lifted bond yields globally. In the US, the 10-year Treasury yield (^TNX) hit 4.72%, and the 30-year yield (^TYX) advanced to 5.31%, a 19-year high.

Earnings, meanwhile, have supported equities so far this reporting season. While the second quarter reporting period has slowed, Home Depot's (HD) stock rose 1% before the bell after reporting an improvement in sales for the second quarter as customers leaned toward smaller projects over the summer. Toll Brothers (TOL), and Klarna (KLAR), are among others on deck.