The high-pitched happy Hungarian is back - and this time he is serious. Laszlo Birinyi, the guru of gurus, who (back in January 2011 - as we noted here) forecast the S&P 500 to be at 2854 by September 2013, now sees the S&P 500 at 1500 by year-end (which looks mysteriously like yet another of his famous ruler-applications). What is fascinatin...