I know that the entire banking sector weighs less now than ever before within the s&p, what you fail to understand is that if BAC, C and the rest of the group go to ZERO the market will fall 2000-3000 points over a weeks time, I dont care what the weighing of these stocks are at this time, market psychology is still impacted negatively when these stocks are trending down and if the rest of the bank stocks like STT, JPM, GS, MS all head to single digits you can expect the markets to sell off with that group.