Could Microsoft Corp. (NASDAQ:MSFT) Bing topple Google Inc.'s (NASDAQ:GOOG) search reign? Jefferies & Co. Internet analyst Youssef Squali thinks it has a chance. He says Microsoft's Bing is gaining market share and its deal to use Yahoo! Inc. (NASDAQ:YHOO) premium search advertising tools could leave Google vulnerable. "The rate of growth in Google's market share is smaller today now that Bing is being pushed aggressively, than it was 3 or 4 or 5 months ago," he says. Watch the video below or download it on iTunes.- Maria Woehr