Global markets wobbled on Monday as a flare-up between the US and Iran sent oil prices sharply higher, just as traders increased their bets that the Federal Reserve will raise interest rates again in September. The combination of rising energy costs and tighter monetary policy expectations rattled investors, who had been hoping for a smoother path for both inflation and borrowing costs.
Oil spikes on Middle East tensions
Brent crude, the international benchmark, jumped 2.8% to $90.60 a barrel. The move came after US forces struck two Iranian missile launchers on Larak Island, according to Reuters. Reports later suggested further attacks on US positions in the region, though details remained unclear. The uncertainty around supply from the Strait of Hormuz, a critical chokepoint for global oil shipments, has been a recurring theme in recent weeks, as Brent crude neared $90 even before Monday's jump.
For everyday investors, higher oil prices are more than just a line item at the pump. Crude is a key input for everything from gasoline and jet fuel to plastics and shipping. When oil climbs, it can push up the cost of goods and services across the economy, feeding into broader inflation. That is exactly what central banks like the Fed are trying to avoid as they work to bring price growth back to their 2% target.
Rate hike bets rise
At the same time, traders have been adjusting their expectations for the Fed's next move. According to the source, markets now price a 57% chance that the Fed will raise its benchmark interest rate in September. That is a notable shift from earlier in the summer, when many investors expected the central bank to hold rates steady or even start cutting them by year-end.
The Fed has been on a campaign to cool inflation by raising borrowing costs, which makes mortgages, car loans, and business loans more expensive. The goal is to slow spending and investment enough to bring prices down without tipping the economy into a recession. But with oil prices rising and other inflation pressures lingering, the path to that "soft landing" looks more complicated.
The prospect of another rate hike has already been weighing on markets. Global stock funds saw their first outflows in 14 weeks ahead of key events like Nvidia's earnings and the Jackson Hole symposium, where Fed officials often signal their policy intentions. The market's mood has been cautious, and Monday's oil spike only added to the anxiety.
What it means for investors
For ordinary investors, the combination of higher oil and higher rate-hike odds creates a tricky environment. Rising oil prices can squeeze corporate profit margins, especially for airlines, trucking companies, and manufacturers that rely heavily on fuel. It can also reduce consumers' purchasing power, as they spend more on energy and less on other goods and services.
Higher interest rates, meanwhile, tend to hurt growth stocks and other assets that are valued on future earnings. When the Fed raises rates, the present value of those future earnings falls, which can drag down stock prices. Bonds, on the other hand, become more attractive as yields rise, pulling money out of equities.
Emerging markets are often hit hardest by a combination of a stronger dollar and higher US rates, as we've seen in Latin American markets slipping on sticky US inflation and the debut of Fed official Kevin Warsh at Jackson Hole. Warsh has hinted at a September hike, which has added to the pressure on those economies.
For investors, the key takeaway is that the "higher for longer" narrative is back. That means being prepared for more volatility in stocks and bonds, and paying attention to how companies are managing their energy costs and debt loads. It also means watching the Fed's next moves closely, as any surprise could move markets significantly.
In the meantime, oil prices will remain a focal point. Any further escalation in the Middle East could push crude even higher, while a de-escalation could bring some relief. For now, the market is bracing for a bumpy ride.
