The S&P 500 and the Nasdaq fell on Tuesday after data showed producer prices increased more than expected in November and ahead of a potential decision on faster tapering from the U.S. Federal Reserve this week. The fast-spreading Omicron coronavirus variant also tamped down the mood after the S&P 500 index hit an all-time closing high late last week. Declines were led by megacap technology and communications stocks, with Meta Platforms, Microsoft Corp., Tesla Inc., Alphabet Inc., and Amazon.com Inc. falling between 0.8 percent and 3 percent. “People are trying to create an environment … to slow the spread or the severity (of Omicron), but also people who are well and want to participate in the economy. So there’s a push and a pull at play here,” said Tom Martin, senior portfolio manager at Globalt. “Investors want to be positioned neutrally till the end of the year. They don’t want …