A government report released Thursday showed a decline in U.S. inflation for June, with prices rising at an annual rate of 3.7 percent compared to May’s 4.1 percent. Despite this improvement, investor confidence remains shaken amid doubts over Federal Reserve Chairman Kevin Warsh’s readiness to raise interest rates aggressively to control inflation.

The recent intensification of the U.S. conflict with Iran has pushed gasoline prices back toward $4.10 per gallon, and proposed tariffs under President Donald Trump’s administration threaten to increase the cost of various goods. These factors contribute to market unease about the inflation outlook.

Investors’ primary concern centers on Warsh’s communication style since his swearing-in two months ago. Known as a longtime inflation “hawk,” Warsh initially reassured markets with his record. However, his reticent approach during his Wednesday press conference, where he declined to provide detailed guidance on monetary policy, has unsettled bond and equity markets. This reticence triggered a sell-off that sent government borrowing costs to their highest levels in roughly 20 years.

Several financial institutions, including Morgan Stanley, JPMorgan, and Bank of America, have expressed skepticism regarding Warsh’s credibility in the face of ongoing inflation pressures, emphasizing that his refusal to clarify the Fed’s strategy casts doubt on his commitment to curbing price increases.

Analysts argue that Warsh’s ambiguous remarks have increased uncertainty regarding the Fed’s path forward. He suggested that interest rate hikes might be part of the solution if inflation remains elevated but stopped short of confirming a direct link or aggressive near-term action. Additionally, he indicated that the Fed might revise its inflation measurement practices after an internal review scheduled for next year, adding to market speculation about changing policy frameworks.

The Fed’s control over interbank lending rates influences a wide range of economic activities, including stock and bond valuations, mortgage rates, and employment trends. The uncertainty surrounding the Fed’s stance has pushed the average rate on a 30-year fixed mortgage to 6.66 percent, a one-year high, underscoring the broader economic implications.

Some experts warn that too much discretion in communication risks weakening the Fed’s reputation for fighting inflation. Adam Posen, president of the Peterson Institute for International Economics, criticized Warsh’s approach as an “overreaction,” arguing that markets rely on forward guidance to adjust expectations appropriately.

Meanwhile, former Federal Reserve Bank of Boston President Eric Rosengren cautioned that perceived Fed complacency could erode investor trust, leading to higher borrowing costs to compensate for inflation risks. Warsh, who previously served on the Fed’s board during the 2008 financial crisis and has a background in economic policy and Wall Street, has acknowledged the importance of maintaining the central bank’s credibility. He has warned that being perceived as “too accommodative” for an extended period could foster persistent inflation, ultimately resulting in costly corrective measures.

As investors await clearer indications from the Fed, the discord over the central bank’s inflation-fighting tactics highlights the challenges of balancing transparency with policy effectiveness amid a complex economic environment.