You bring up the point that the Fed is a market follower. Well, that's true in the best of cases. For the past seven years or so, Greenspan has ignored the market completely.
No - not that market.....The fed is reacting to the interest rate market.....if they did nothing - the market rate would be too far away from their prime rate...so they adjust it. I'll see if I can find the article explaining that and post it here.