The U.S. dollar held steady Wednesday, with the dollar index trading around 105.0 despite escalating hostilities between the United States and Iran. The Japanese yen found support as traders weighed increased risk of intervention by Japanese authorities.

Geopolitical tensions in the Middle East typically prompt flight-to-quality flows into U.S. Treasuries, but yields showed limited movement. The 10-year Treasury yield held near 4.5 percent while the two-year remained close to 4.9 percent, suggesting markets are balancing geopolitical risk premiums against the Federal Reserve's higher-for-longer stance.

The yen's stability reflects significant market caution regarding potential currency intervention. Japanese officials have issued repeated warnings against excessive yen volatility, signaling readiness to act. This intervention risk has established a floor for the yen against major counterparts, preventing further depreciation.

Broader equity markets reflected cautious sentiment, with major indices closing lower. The S&P 500 dropped 0.4 percent and the Dow Jones fell 0.6 percent. The Russell 2000 saw a sharper decline of 1.6 percent.

The environment highlights persistent duration risk for fixed-income investors. Longer-dated Treasuries face uncertainty from both evolving inflation outlooks and geopolitical events. Spread compression in corporate bonds remains a focus as credit markets assess these broader risks. The Federal Reserve's next policy statement on June 12 will provide clarity on the U.S. interest rate path and its impact on global markets.