Shares closed at $256.55 as the S&P 500 fell 0.38% to 7,337.11 and the Dow dropped 0.63% to 49,596.97.
The decline ended a two-day winning streak, leaving Ecolab 17.05% below its 52-week high of $309.27 reached on 24 February.
Ecolab lagged mixed peer moves, with Procter & Gamble and Colgate-Palmolive falling while Waste Management rose; trading volume reached 1.7 million, above its 50-day average of 1.5 million.
With strong earnings and a bright outlook, why is Ecolab's stock on a prolonged losing streak?
The CEO sold millions in stock at its peak. Should investors see this as a warning sign?