Directional Bias For The Day: S&P Futures are lower; drifting up since 5:00 AM Odds are for a down day with increased choppiness and elevated volatility Key economic data due: Unemployment Claims (231K vs. 226K est. and 235K prev.) at 8:30 AM Revised Unit Labor Costs (0.1% vs. 1.1% est. and 1.2% prev.) at 8:30 AM ISM Non-Manufacturing…