Mike Santoli’s market notes: Well-earned breather, technically stretched, 2021's possible subplots

Traders work on the floor of the NYSE.

This is the daily notebook of Mike Santoli, CNBC's senior markets commentator, with ideas about trends, stocks and market statistics.

(This story is for CNBC PRO subscribers only.)

  • Market acts comfortable up here, taking a well-earned breather after one of the best five-week advances we've seen since….mid-summer 

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