Shares of Netflix Inc. NFLX, -1.48% plummeted 19.6% in premarket trading Friday, as the streaming-video service's disappointing outlook overnight prompted a number of Wall Street analysts to cut their ratings, but at least one analyst said the selloff appears "overcooked." Benchmark's Matthew Harrigan, who's been bearish on Netflix for at least the past two years, isn't turning bullish, but he did raise his rating to hold from sell.