Brent crude rose above $100 a barrel on Wednesday as fighting between the United States and Iran disrupted energy flows and heightened concerns about inflation, interest rates and financial-market stability.

The international benchmark reached $100.19 a barrel, its highest level since July 24. The sharp move in oil prices came as military action involving the two countries raised concerns about the security of crude supplies and shipping.

According to the supplied report, the US military attacked five Iranian crude-oil carriers. Iran responded with missile attacks on US forces in Jordan and attacks on shipping, adding to uncertainty around energy flows and the wider regional market.

Global shares fall as oil prices climb

The rise in crude prices was accompanied by losses across major stock markets. The S&P 500, Dow Jones and Nasdaq all recorded declines, while European shares fell to one-week lows.

The market reaction reflected concern that sustained disruption to oil supplies could affect companies, consumers and economies through higher energy costs. Oil is a closely watched input across transportation, manufacturing and other sectors, meaning a sharp increase in crude prices can add to broader price pressures.

The movement in oil also came as investors assessed the possible effect on monetary policy. Higher energy prices increased concerns about energy-driven inflation, while bond yields rose as traders anticipated tighter monetary policy.

Inflation and interest-rate concerns

The increase in bond yields indicated that traders were reassessing the outlook for interest rates amid the jump in oil prices. If energy costs remain elevated, markets may expect central banks to face greater pressure to keep monetary policy tighter in response to inflation.

That prospect weighed on risk sentiment, with both US and European equities falling. The combination of higher crude prices, weaker share markets and rising bond yields showed how quickly military developments can spread through global financial markets.

The latest price move also put attention on whether the disruption to energy flows would persist. Brent’s rise above the $100 threshold marked a significant shift for markets, particularly because it followed attacks on oil carriers and shipping.

The situation remains developing. Further military action, additional attacks on shipping or changes in the flow of crude could influence oil prices and determine whether concerns about inflation and tighter monetary policy intensify. Investors will continue to monitor developments involving the United States, Iran and regional energy transport.

For now, the immediate market response has been clear: Brent crude has moved above $100 a barrel, major stock indexes have fallen and bond yields have risen as traders assess the economic consequences of the fighting.