Brent crude oil has climbed above $100 a barrel, putting renewed pressure on U.S. businesses and financial markets as investors assess the economic impact of the escalating U.S.-Iran conflict.

Energy Costs Put Pressure on Markets

Oil prices surged on Wednesday, with Brent crude moving above the $100-per-barrel threshold for the first time since July. The increase is raising concerns that higher energy costs could feed into inflation across transportation, manufacturing and other major sectors.

U.S. stock futures were largely muted as investors weighed the potential economic consequences. Higher oil prices can increase operating costs for companies while also putting pressure on household budgets.

Fed Rate Outlook Comes Into Focus

The oil surge is also complicating expectations for the Federal Reserve's interest-rate policy. Markets are increasingly watching whether persistent inflation pressures could influence the central bank's next decision.

The 10-year U.S. Treasury yield has risen to around 4.81%, its highest level in nearly three years, adding another source of pressure for companies that rely on borrowing to finance expansion and investment.

Investors are now turning their attention to upcoming U.S. inflation data, including the Producer Price Index and Consumer Price Index, which could provide fresh clues about the direction of monetary policy.

For American businesses, the combination of higher energy prices, borrowing costs and geopolitical uncertainty is creating a more challenging environment heading into the fall.