Why?... are you frigging joking? ONE USUALLY BUYS AND SELLS STOCK <u><b>TO MAKE MONEY!!!!!!!!!!!!!!!!!</b></u> DUH-<b>DUH</b>-DUH-<b>DUH</b>-DUH-<b>DUH</b>-DUH-<b>DUH</b>-DUH-<b>DUH</b>-DUH-<b>DUH</b>-DUH!!!