Ben Bernanke, the Fed chairman, trudges up to Capitol Hill this morning with the fate of the world resting upon his shoulders. Or at least the fate of today’s trading session. We’ll save you the trouble. Bernanke’s such a broken record these days — given the current political environment who can blame him –  we can tell you ahead of time what he’ll say. Here’s the bottom line: Bernanke’s been jawboning about policy and levers and QE3 for more than a year now, but hasn’t acted. He knows better than the market the limits of the Fed’s powers. If things get much, much worse, he’ll hold his nose and “do ... (full story)