"We take strong issue with the reporting about the state of our company, and we feel compelled to set the record straight," Alibaba said in a statement.
Shares of Apple gained, last up 1.2 percent for the biggest percentage increase in the Dow. The company said preorders for its new iPhone model were "very strong," and are on track to top last year's record for the first weekend of sales.
"Customer response to iPhone 6S and iPhone 6S Plus has been extremely positive and preorders this weekend were very strong around the world," Apple said in a statement. "We are on pace to beat last year's 10 million unit first-weekend record when the new iPhones go on sale Sept. 25."
In Europe, the Stoxx 600 Index ended the day with a 0.6 percent decline from the previous close. The UK's FTSE 100 Index fell 0.5 percent, while France's CAC 40 Index slid 0.7 percent. Germany's DAX Index eked out a 0.1 percent advance.
The Shanghai Composite Index fell 2.7 percent after reports over the weekend showed China's industrial output and investment data fell short of expectations.
"From the perspective of monetary policy, the government has done what it can, but demand from the real economy needs to pick up to really make use of that," Ding Shuang, chief China economist at Standard Chartered in Hong Kong, told Bloomberg.
The pending Fed decision and concern about China's economic outlook also weighed on commodities, including oil and copper.