Two of Wall Street's most popular names, Netflix (NASDAQ: NFLX) and Facebook (NASDAQ: FB), have finally taken a breather. In the three-year period(s) leading into their respective summer earnings releases, Netflix returned more than 300% to its shareholders, and Facebook returned 121%. In less than a month, however, the behemoths have collectively shed $135 billion in value post-earnings.Does that mean they are good stocks to buy?