BIG DROP: The stock market fell the most in five weeks amid some disappointing earnings news. Health care stocks were among the biggest decliners, led by Laboratory Corporation of America, which slumped after cutting its full-year earnings forecast.
'BUYER'S FATIGUE': Investors may be becoming wary after the stock market's big gains this year. The Standard & Poor's 500 index is up 25 percent in 2013 and could still end with its biggest annual increase in a decade.
STOCK SPLIT, PRICELESS: MasterCard jumped after announcing a 10-for-1 stock split. The company also raised its dividend and launched a $3.5 billion stock buyback program