Markets End August With Rising Risk
Global financial markets entered the final trading day of August cautiously as renewed fighting between the United States and Iran pushed oil prices higher and increased concerns about inflation.
Brent crude rose above $90 a barrel after U.S. forces struck Iranian launchers on Larak Island and Iran retaliated against U.S. forces in Jordan. The escalation added another layer of uncertainty for investors already reacting to signals that major central banks could keep interest rates higher for longer.
The market reaction was particularly visible in government bonds, with borrowing costs in Japan and Germany reaching multi year highs.
Oil Prices Revive Inflation Concerns
The latest escalation has placed energy markets at the centre of investor concerns.
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Oil prices rose around 2% as markets assessed the potential impact of renewed U.S. Iran fighting and continued tensions around the Strait of Hormuz, a critical route for global energy shipments.
Higher oil prices create a difficult environment for central banks because they can feed directly into consumer inflation. If energy costs remain elevated, policymakers may face greater pressure to delay rate cuts or even consider additional increases.
The possibility became more significant after Federal Reserve Chairman Kevin Warsh delivered a hawkish speech at Jackson Hole, signalling a stronger focus on controlling inflation.
Fed Rate Hike Expectations Rise
Markets have increased their expectations of a U.S. interest rate increase in September.
The probability of a September hike rose to 57%, pushing short term Treasury yields higher and contributing to a flatter yield curve.
JPMorgan chief U.S. economist Michael Feroli said the September meeting remained a possibility, although the bank still expected the next increase in December.
Barclays, meanwhile, expects the Federal Reserve to raise rates by 25 basis points in both September and December.
The direction of monetary policy will depend heavily on upcoming economic data, particularly the August employment report and inflation figures due in September.
Bond Yields Hit Multi Year Highs
The pressure was not limited to the United States.
Japan’s two year government bond yield reached its highest level in 31 years, while Germany’s two year yield climbed to its highest level since July 2024.
Japan’s 10 year government bond yield also reached its highest level since 1996.
The rise in global borrowing costs reflects growing expectations that central banks may need to maintain restrictive monetary policies to prevent renewed inflation.
For governments, higher yields also mean increased borrowing costs, potentially adding pressure to already stretched public finances.
European and Asian Stocks Remain Cautious
European equities opened slightly lower, while U.S. stock futures were flat to marginally weaker.
Japan’s Nikkei slipped 0.1%, while MSCI’s global stock index was also slightly lower.
Chinese blue chip stocks recovered from early losses, although property developers remained under pressure following regulatory changes announced by Beijing.
China’s official manufacturing purchasing managers’ index improved to 49.8 in August from 49.2 in July, although the reading remained below the 50 mark separating expansion from contraction.
Yen Under Pressure
Japan’s currency remains another concern for markets.
The yen has again fallen beyond 160 per dollar, increasing pressure on Japanese policymakers to consider tighter monetary policy.
Analysts argue that further interest rate increases could help support the currency. U.S. Treasury Secretary Scott Bessent said the yen’s movement remained relatively contained and did not appear disorderly enough to require renewed joint intervention by Japan and the United States.
The dollar was last trading at around 159.56 yen.
Europe Also Faces Rate Pressure
European monetary policy is facing similar inflation concerns.
Euro zone inflation figures due this week are expected to reinforce expectations of a September interest rate increase by the European Central Bank.
New Zealand’s central bank is also expected to raise rates for a second consecutive meeting, while the Bank of Canada is expected to keep rates unchanged because of concerns over the economic impact of its trade dispute with the United States.
The combination highlights how geopolitical tensions and energy prices are complicating monetary policy decisions across several major economies simultaneously.
G20 Focuses on Inflation and Interest Rates
The market uncertainty comes as G20 finance ministers and central bankers meet in North Carolina.
Inflation, interest rates, currencies and the economic consequences of geopolitical tensions are expected to dominate discussions.
Bessent is also expected to meet the head of the Bank of Japan amid speculation that Japanese policymakers could raise rates in September.
Gold Remains Strong Despite Bond Selloff
Gold prices slipped around 0.3% to approximately $4,437 an ounce after falling sharply on Friday as bond yields surged.
Despite the short term decline, gold remained on track for a roughly 10% gain in August, its strongest monthly performance since January.
The continued strength of gold reflects its appeal as a hedge against geopolitical uncertainty and financial market volatility.
Analysis
The latest market reaction demonstrates how geopolitical escalation can quickly become a monetary policy problem.
The central concern is no longer simply whether U.S. and Iranian forces exchange further attacks. Investors are increasingly focused on whether prolonged conflict will disrupt energy supplies enough to create a second round of inflation.
That creates a difficult choice for central banks. Higher oil prices could force policymakers to maintain or increase interest rates even as elevated borrowing costs weaken economic growth.
The Federal Reserve is particularly important because a combination of stronger inflation and higher rates could affect global financial conditions, currencies and emerging markets.
The situation is also exposing vulnerabilities in Japan and Europe. Japan faces pressure from a weak yen and rising bond yields, while Europe could confront renewed inflation at a time when its economy remains sensitive to higher financing costs.
The key market risk is therefore the interaction between war, energy prices and monetary policy. If oil prices remain elevated because of continued disruption around the Strait of Hormuz, the Iran conflict could extend beyond energy markets and reshape global interest rate expectations, bond markets and investor risk appetite.
With information from Reuters.
