SECTOR COMMENTARYEnergy stocks closed mixed, as a late-day rally carried several subgroups into the green. U.S. integrateds were the best-performing group after Chevron said that upstream and downstream operations were strong during the fourth quarter. Refiners were the biggest laggards on the day, with the S&P Refiners index closing down over 1%.Money managers raised their net long U.S. crude futures and options positions in the week to January 8, the U.S. Commodity Futures Trading Commission (CFTC) said on Friday. The speculator group raised its combined futures and options position in ...