The latest out of Wall Street-land is a warning by analysts at Citibank that profits at Goldman Sachs and Morgan Stanley (and to a lesser degree at other banks as well) will show a sharp contraction for the second quarter of 2011. Leaving aside the inside baseball nature of one Wall Street firm issuing a negative report on other firms, the decline in profitability stands in contrast to the widespread perception that banks and investment houses are booming while the rest of the economy is suffering. Or does it?