US Federal Reserve chair Kevin Warsh is under scrutiny as he prepares to address investors and policymakers at the annual Jackson Hole symposium. This comes at a critical time, with mounting signs of economic strain, including US public debt hitting a record $40 trillion and long-dated bond yields reaching a 19-year high. Warsh, appointed by President Donald Trump, along with Treasury Secretary Scott Bessent, faces criticism over their approach to communicating economic policy, with some investors questioning the credibility of Treasury guidance following Bessent's abrupt announcement of bond buybacks.

Economists, in a poll conducted for the FT by the University of Chicago's Booth School of Business, expressed significant concerns. A majority believe it will take longer for the Fed to bring inflation back to its 2% target, and more than 60% cited concerns over the Fed's credibility as having a substantial impact on the rise in long-term yields since Warsh's nomination. Many also noted the significant shift from the more open communication strategies of his predecessors, Jay Powell, Janet Yellen, and Ben Bernanke, with 75% stating Warsh's performance was in line with their expectations for this new, pared-back style.

Warsh's first appearance as Fed chair at Jackson Hole is seen as a crucial moment for him to articulate the framework behind his less communicative style. He is expected to use his speech to address elevated government borrowing costs, inflation that remains above the 2% target (the personal consumption expenditures index rose 3.7% annually in July, exceeding the 3.6% forecast), and the unusual tension created by the US Treasury's intervention to suppress long-term yields. The market is currently pricing a 40% probability of a September rate hike, down from 55% a month ago, highlighting the pressure on Warsh to persuade markets of the Fed's commitment to its inflation target.