Stocks slumped for a second straight session Monday, putting a blemish on the new market uptrend. The Nasdaq shed 0.8%, closing back below its 50-day moving average. Chips and solar stocks were areas of weakness for the tech-heavy index. But biotechs bucked the weakness. The S&P 500 also ended down 0.8% amid selling in energy stocks. Seven of the day’s 10 worst-performing industries belonged to the oil and gas space.