Fed Oversight

I'm listening (distractedly) to the Q & A session part of the Bernanke Congress testimony and something funny happened. One smiling, seemingly innocuous, congresswoman asks him a question to the effect that every time he has lowered interest rates lately, the stock market (she specifically mentioned a "New York Stock Exchange index" she follows) seems to take it well at first, goes up strongly but then a few days later retreats and falters to the point where it finds itself lower than at the time of the rate cut. And this is the funny part: in his answer, some boilerplate to the effect that rate cuts take time to take effect, he didn't even bother pointing out that the Fed's rate cut policy is not aimed at propping up the stock market. So was it just an oversight on his part or is it that he so internalized the fact that the Fed does in fact monitor, react to and target the stock market (even though it's not in its mandate and that previous Fed officials have always denied it) that he just didn't pick up on the congresswoman's implication that the Fed's only reason for cutting rates is to support the stock market?