Former Federal Reserve vice-chair Bill Dudley has launched a sharp critique of current Fed Chair Kevin Warsh, arguing that the central bank's leadership is dangerously outsourcing monetary policy to financial markets.

In an opinion piece published by the Australian Financial Review, Dudley contends that Warsh's approach is "deeply flawed" because it treats the Fed as a passive referee rather than an active manager of market expectations.

Dudley's comments highlight a growing rift between the central bank's communication strategy and the needs of market participants.

He asserts that when the Fed chair refuses to provide clarity on what metrics are driving policy decisions, investors are left without a reliable framework for pricing risk.

This lack of transparency, Dudley argues, forces markets to guess at the Fed's intentions rather than responding to clear guidance.

The criticism arrives amid mounting frustration from investors who have already rebuked Warsh for an aggressive, inflation-focused stance that they argue has failed to deliver tangible economic results.