Chairman explains not previewing decisions allows markets to provide independent judgment rather than echo Fed.

By not spoon-feeding markets, by not previewing our decisions, by not sort of giving nudges and liens, my colleagues and I have found in the inter-meeting period what we're getting is the views from a very accomplished economist. That's the internals of financial markets. Instead of just repeating or echoing what we were saying back to us, they're giving us somewhat, not perfect, their own judgment. So surprises are not the objective, but at the same time I would say we didn't come into this meeting feeling constrained by the full range of alternatives we had in front of us.