It's the most puzzling thing about the stock market to investing newbies: How can a company like Nokia see its earnings rise 25 percent, but its shares tumble 10 percent? That's because for most tech stocks, Wall Street doesn't care what you've done for it lately; they care more what you're going to do. And Nokia has given a depressing forecast for U.S. sales. The rational response, of course, is to push off all deals as far into the future as possible, and then announce glistening expectations for what's to come. That seems easier than actually running one's business in a rational manner. [WSJ]