Even though stock index futures continued to rise following yesterday's close, the futures turned negative again during the night. Note in this chart the support at yesterday's closing price, shown as a white line in the 15 minute chart on the left. After a temporary bounce, prices once again began to fall, and broke through that same support on the second attempt. Disappointing earnings reports appear to be the culprit once again. The futures are now in the red once again. As just one example, even Apple's solid Q4 showed some gaping holes in what was thought to be a solid foundation, especially in sales of Macs and iPods, the foundation of their profits.
