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Here are five key things investors need to know to start the trading day:

Stock futures trading was halted this morning after a data center “cooling issue” took down several Chicago Mercantile Exchange services. Individual stocks were still trading before the bell, while the CME said futures indexes and options trading would open fully at 8:30 a.m. Follow live markets updates here.

The stock market has rebounded during the holiday-shortened trading week. But the three major indexes are still on pace to end November’s trading month — which ends with today’s closing bell — in the red. The Dow

and S&P 500