 U.S. stock futures are mixed this morning after a major tech sell-off. The Dow futures are down 49. Nasdaq futures are up 70. And the S&P futures are up 8. In overseas markets, the London FTSE 100 is up 63 points or 0.8%. German DAX is up 42 points or 0.2%. But the Nikkei 225 closed down 971 points or 2.4%. U.S. stock markets seem to be looking for direction as we approach this morning's opening bell.