Technology and retail companies continued to stumble. Amazon dropped another 2 percent to $1,719.36 and Apple fell 0.9 percent to $214.45. Microsoft and Alphabet, Google's parent company, were little changed. Those stocks have made huge gains for years, but they're currently out of favor. Amazon and Alphabet, respectively the second- and fourth-most valuable U.S. companies, are in what's known as a "correction," a drop of more than 10 percent from a recent peak. Facebook, the sixth-largest company, has tumbled 29 percent since late July, surpassing the 20-percent threshold for a "bear market."