Traders work on the floor of the New York Stock Exchange (NYSE) in New York City, U.S., December 16, 2016.  REUTERS/Brendan McDermid
Traders work on the floor of the NYSE
  • The S&P 500's sector correlations suggest the current rally can go to year-end, DataTrek Research said.
  • The indicator is a sign of investor confidence, and it's hovering near levels seen around bull markets of the past.
  • "The S&P 500 does not tend to see a near term top until correlations are well below average, and we are far from those levels right now."

The stock market is in the midst of a strong November rally, and according to DataTrek Research, the gains could last through year-end thanks to a key historical trend.