The Federal Open Market Committee convenes Tuesday and Wednesday for what is shaping up to be one of the most closely watched meetings in recent memory — not because of what the Fed is expected to do, but because of what it is expected to signal. The committee will almost certainly leave the federal funds rate unchanged at its current range of 3.50% to 3.75%, with futures markets pricing in a 99.6% probability of no change. The rate decision is effectively a foregone conclusion. Everything else about this meeting is not.