The dollar weakened against most major peers Monday, while the yen jumped and gold hit a record high. The sell-off accelerated after traders reported the Federal Reserve Bank of New York contacted financial institutions to inquire about the yen's exchange rate, reigniting fears of coordinated currency intervention.

This move suggests U.S. central bank officials are monitoring potential market distortions, a step that often precedes direct action. For investors, it raises the specter of a renewed Plaza Accord-style pact, which could destabilize currency markets and alter the trajectory of global trade flows.

Market participants will now watch for any formal statements from Japanese or U.S. monetary authorities. A sustained yen rally could pressure Japanese exporters and complicate the Fed's inflation fight, making this a critical front in the ongoing battle for global economic stability.