A selloff in tech rolled over into day two, dragging the Nasdaq from record highs set last week and souring market mood. However, indexes had moved off of the day's lows by the middle of the session. Apple (AAPL - Get Report) was one of the worst performers after getting hit with another downgrade. Mizuho downgraded to NEUTRAL from BUY, arguing that high expectations for the upcoming iPhone 8 had already been priced in. Amazon (AMZN - Get Report) followed tech stocks lower even after Piper Jaffray reiterated an OVERWEIGHT rating and increased its price target by $150 to $1,200. Analyst Michael Olson says Amazon's retail growth in the second quarter is unlikely to slow down. Pandora  (P) fell after Oppenheimer downgraded to PERFORM from OUTPERFORM. Analysts said they believe the company's turnaround will take time.