Retail cannot short AFFY. i agree with you, that it is hard to believe that anyone other than WS professionals is short AFFY. Go ahead retail. Challenge me. Try to short 100 shares of AFFY. You cannot do it. Why do you think that is so? Is it because WS wants to make retail rich? If so, buy all the AFFY you can and mortgage your home to do so. If not, then maybe buying AFFY really is not the investment that longs make it out to be.