Michael Brush is a columnist for MarketWatch. At the time of publication, he had no positions in any stocks mentioned in this column. Brush has suggested LNG, Nvidia and Chipotle Mexican Grill, in his stock newsletter, Brush Up on Stocks

If you’re a long-term investor, this year’s selloff is good news because it offers a great chance to pick up quality companies at a discount. But wait a second. If a company is ‘high quality’, why would its stock be getting hit?