Now here's a pretty open-and-shut case. What do you think could have caused Take-Two's share price to rise almost 18 percent yesterday? The company had the release of a little game called LA Noire to thank for that.

On Monday, Take-Two shares were hovering around $15 a pop, but shot up yesterday as LA Noire launched and closed at $17.10 -- the highest valuation since the proposed takeover by EA. As of the market's close today, shares were still trading in that range, hitting as high as $17.28 this afternoon.