Pretty much everything but tech stocks were having a tough time on Monday.The S&P 500 was down 0.5%, and 357 stocks in the index were down on the day. The Dow was down 305 points, or 0.6%. The Nasdaq Composite was down 0.3%.Tech was the only major S&P 500 sector that was rising. Health care, energy, materials, consumer discretionary, and communication services were all down more than 1%. ...