Fed's Warsh under pressure to clarify message in highly anticipated Jackson Hole speech

Federal Reserve Chairman Kevin Warsh faces pressure to clarify his policy message at the Jackson Hole symposium. He previously indicated a focus on broad ideas rather than tactical details. Markets are skittish amid Treasury interventions in bond and currency markets. Investors grow restless with Warsh's vague, high-altitude rhetoric. His speech Friday at 10am ET is highly anticipated.