BY THE NUMBERS

U.S. stock futures were relatively flat Wednesday, one day after Wall Street broke a three-session losing streak driven by concern over a spike in Covid cases in the U.S. due to the now-dominant omicron variant. The Dow on Tuesday gained 560 points, or 1.6%. The S&P 500 jumped nearly 1.8%. The Nasdaq surged 2.4%. All three benchmarks were tracking for solid December and stellar year-to-date gains. (CNBC)

* Cramer: says charts suggest S&P 500 may not be as strong in 2022 (CNBC)

Wednesday morning's economic calendar includes the third estimate of third-quarter gross domestic product. The government said GDP grew 2.3% in Q3, higher than forecasts and the previous estimate.

* Mortgage rates fall to a four-week low, but buyers still pull back (CNBC)