New Delhi, Aug. 27 -- Markets have signaled to Federal Reserve Chairman Kevin Warsh that they want more explicit guidance about how the U.S. central bank intends to restore price stability. If Warsh can't supply answers on Friday in his keynote address at the Fed's annual symposium in Jackson Hole, Wyo., his credibility may fall victim to a crisis of his own making.

"Details, details, details: This is what investors are looking for, not consultant-speak," said Jack Janasiewicz, lead portfolio strategist at Natixis Investment Managers Solutions.

Warsh, who became Fed chairman in May, has been deliberately taciturn about his view of economic conditions, saying reduced Fed communication improves the market's ability to interpret economic s...