Directional Bias For The Day: S&P Futures are lower; moving  down since 4:00 AM; Odds are for a down to sideways  day with elevated volatility  – watch for break above 2852.00 for change of fortune Key economic data due: Existing Home Sales (est. 5.10M; prev. 4.94M) at 9:45 AM Risk-off sentiment due to weak economic…