Downside targets to watch for the S+P 500 - 5% correction = 4310. Today it dropped to 4306 intraday, so a 5% correction before bouncing in the last half hour. 10% correction = 4083, which is very close to the 200 MA (4106 and rising). So 4100 is a key target area to watch in the months ahead. 20% correction = 3630, which would also correspond to a 38.2% Fibonacci retracement (3644) (numbers are approximate)