March closed with a highly volatile picture across global financial markets, as tensions involving Iran triggered a major shock in the energy market and sparked a broad repricing across asset classes. Oil prices surged at a historic monthly pace, reigniting inflation concerns, reshaping interest rate expectations, pushing bond yields higher, and weighing heavily on equities, especially in Asia. In this environment, the U.S. dollar once again emerged as a key safe-haven destination for global capital.

A Sharp Oil Surge Became the Market’s Central Theme

The most striking development in March was the powerful rise in oil prices. Brent crude is on track to gain around 59% for the month, marking the largest monthly increase on record, with prices trading near $115 per barrel. Meanwhile, U.S. crude has also climbed roughly 56% over the same period.

Behind this move are growing concerns over supply disruptions, particularly around the Strait of Hormuz, a strategically critical route for global energy flows. As fears over supply risks intensified, the sharp increase in energy prices quickly revived concerns about prolonged inflation and added pressure to an already fragile global growth outlook.

Asian Equities Were Hit the Hardest

The impact of the oil shock was especially visible in Asian equity markets, where many economies remain heavily dependent on energy imports from the Middle East. In March, the MSCI Asia-Pacific ex-Japan index fell more than 12%. Japan’s market also came under significant pressure, with the Nikkei expected to post a 12.6% decline.

More notably, South Korea emerged as one of the worst-hit markets, with the Kospi plunging more than 17%, marking its steepest drop since 2008. This reflects the region’s vulnerability to energy price shocks, particularly at a time when rising input costs threaten both economic growth and corporate earnings.

Inflation Has Moved Back to the Center of Policy Expectations

The surge in oil prices has not only affected commodities and equities, but has also rapidly reshaped expectations for global monetary policy. As energy costs rise, the risk of persistent inflation becomes more apparent, leading markets to increasingly price in a scenario where central banks will keep policy tighter for longer rather than move quickly toward easing.

In the United States, the current expectation is that the Federal Reserve is more likely to hold rates steady rather than begin cutting as some had previously anticipated. This shift has been immediately reflected in the bond market. U.S. two-year Treasury yields rose by 40 basis points, the largest increase since October 2024, while ten-year yields climbed 37 basis points.

That sharp move in yields has put heavy pressure on bonds, making this one of the weakest months for the fixed-income market in recent times. It shows that the oil shock has not only revived inflation fears, but has also undermined expectations of monetary easing, affecting both equities and bonds at the same time.

The U.S. Dollar Benefited From the Uncertainty

While many asset classes came under pressure, the U.S. dollar clearly emerged as a major beneficiary. In March, the greenback gained around 2.9%, marking its strongest monthly advance in eight months. This move suggests that investors are prioritizing highly liquid and relatively safer assets during a period of heightened uncertainty.

By contrast, the euro fell nearly 3%, while the Japanese yen traded around the 160 yen per dollar level, raising concerns about possible government intervention. The strength of the U.S. dollar not only reflects a defensive investor mindset, but also adds further pressure on other economies and financial markets at a time when funding costs and import bills may rise further.

Market Sentiment Has Shifted Decisively Into Defensive Mode

One of the most important features of March was the change in investor behavior. Rather than reacting to individual headlines in isolation, markets have increasingly shifted into a broad risk-avoidance stance. The concern is no longer limited to the immediate oil spike itself, but to the possibility that the conflict could drag on and deepen the damage to global growth.

Although markets have occasionally seen brief rebounds on positive signals from ceasefire discussions, overall sentiment remains fragile. This shows that geopolitical developments are still playing a dominant role in shaping short-term market direction.

What Should Investors Watch?

The developments of March suggest that global markets are entering a more sensitive phase, one in which geopolitical shocks can quickly spill over into inflation, interest rates, currencies, and asset valuations. Brent crude’s roughly 59% monthly surge is not just a striking number, but also a warning sign that macroeconomic risks are returning with force.

Asian equities have already responded sharply to the downside, bond markets have suffered meaningful losses as yields surged, and the U.S. dollar has further reinforced its safe-haven role. In this environment, investors need to monitor oil prices, inflation trends, interest rate expectations, and geopolitical tensions closely, as these will likely remain the key variables shaping market direction in the weeks ahead.

March ended not only with a historic spike in oil prices, but also with a clear shift in the structure of global market sentiment. Inflation has returned as a central concern, interest rate expectations have been repriced, both equities and bonds have come under pressure, and capital has flowed back into the U.S. dollar as a safe haven. If oil prices remain elevated, markets may face an even more challenging period ahead, where the balance between controlling inflation and protecting growth becomes more difficult than ever.