S&P futures vs fair value: +10.2. Nasdaq futures vs fair value: +17.5.

The market is on track for a positive start as better than expected results from Amazon.com (AMZN) and the reflex response to yesterday's big sell-off are driving the bullish bias. The market has again been inundated with earnings news, but look for attention to turn to the economic data at 10:00 ET when existing home sales for June are reported. Economists expect a 2.3% decline from the prior month to an annualized rate of 5.85 mln