(These are the market notes on today's action by Mike Santoli, CNBC's Senior Markets Commentator. See today's video update from Mike above.) It says a lot about the gentleness of the market's recent climb that today's half-percent sag in the S & P 500 would essentially match the two worst days for the index since late August. At this point, the action is best described as a few days of hesitation since the index first hit the 6,700 level eight days ago. Still, because so much attention has fallen on the sustainability of the feverish AI-driven leadership and we're now seeing a coincident pullback in the over-extended gold price, the bumpy action stands out. Market breadth is skewed lower by a 3:1 ratio with a distinct "sell the winners" tone. Of the 15 best-performing S & P 500 component s

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