KEY POINTS
  • Breadth as measured by the advance/decline line has been improving almost every day since the Dec. 24 bottom.
  • That A/D line is now essentially near the historic high it hit late in 2018.
  • Other internals are also strong: New highs are expanding, selling pressure is low and the Dow Jones Industrial Average is riding an eight-week win streak.
Traders work on the floor at the closing bell of the Dow Industrial Average at the New York Stock Exchange on January 10, 2019 in New York.

The markets are starting off with a somewhat defensive edge on Tuesday, but the overall trend has been remarkably positive. So, why are so many people cautious about the markets?

You wouldn't be cautious looking at the details. Breadth as measured by the advance/decline line has been improving almost every day since the Dec. 24 bottom. It means more stocks are advancing than declining, and it's the single most important indicator I look at. That A/D line is now essentially near the historic high it hit late in 2018.