Goodyear Tire & Rubber sank 10 percent after a steep dropoff in sales in Europe delivered a blow to its earnings. Shares fell $1.26 to $11.04.
The advertising conglomerate Interpublic also turned in results that fell short of analysts' forecasts, and its stock fell 3.9 percent -- down 15 cents to $10.40.
Of the 10 industry groups in the S&P 500, the biggest gains were in technology and telecom stocks. Intel and Microsoft both rose more than 1 percent.
Amazon shares rose $13.62, or 6.1 percent, to $236.60 despite a smaller-than-expected quarterly profit and a prediction for smaller-than-expected holiday revenue.
Among other companies making big moves, cable TV provider Comcast jumped $1.36, or 3.7 percent, to $37.32 after reporting that its income more than doubled in the latest quarter. Revenue was higher than analysts were expecting, and more customers signed up for premium services like high-definition video recorders.
Varian Medical Systems jumped $8.96, or 15 percent, to $67.06, the biggest increase in the S&P 500 index. The company, which sells medical imaging equipment and radiation-emitting devices for treating tumors, reported a 20 percent rise in income because of higher sales of devices.
On its first day of trading, Dairy company WhiteWave Foods lost 18 cents to $16.82, down from its initial public offering price of $17, after rising as high as $19.17 earlier.
The yield on the 10-year Treasury note fell to 1.76 percent from 1.82 percent on Thursday.