DOW JONES UNOFFICIALLY CLOSES UP 647.51 POINTS, OR 2.11 PERCENT, AT 31,277.68  S&amp;P 500 UNOFFICIALLY CLOSES UP 70.48 POINTS, OR 1.86 PERCENT, AT 3,860.86  NASDAQ UNOFFICIALLY CLOSES UP 187.00 POINTS, OR 1.66 PERCENT, AT 11,438.18