Buy Microsoft's stock while it's down? First ask yourself this question.

Sentiment toward Microsoft's stock MSFT was already bleak heading into its latest earnings report, and it only got worse despite what Matt Stucky, chief portfolio manager for equities at Northwestern Mutual Wealth Management, called "reasonably good†numbers. Microsoft shares slid 10% on Thursday to log their worst day in more than 12 years. Microsoft's stock hasn't been this cheap in almost three years. But what, exactly, investors should do about that is increasingly a topic of Wall Street debate. ...