Capital One

US stocks sink; S&P 500 index notches another losing week

The losses on Friday gave the Standard & Poor's 500 index its fourth losing week out of the last five.

Capital One and Biogen plunged after reporting results that disappointed investors.

US stocks edge mostly lower; Amazon soars on surprise profit

With corporate earnings in full swing, several big companies were making sharp moves Friday after reporting their results.

Most notable was Amazon, which jumped 17 percent after surprising investors with a profit.

Elsewhere, Capital One sank 10 percent and Biogen plunged 17 percent after their results fell short of what analysts were expecting.