Directional Bias For The Day: S&P Futures are little changed; The odds are for a sideways day  — watch for a break  above 4432.00 and break below 4416.50 for clarity Key economic data report due during the day: Prelim Nonfarm Productivity ( 2.3% vs. 3.3% est.; prev. 4.3%) at 8:30 AM Prelim Unit Costs (1.0%…