SECTOR COMMENTARYThe energy sector ended the day mostly lower on muted volumes, with refiners heavily outpacing the group while services lagged. Investors kept mostly to the sidelines but were slightly better to sell ahead of a busy week for earnings in what most analysts are expecting to be an uninspiring quarter.Front-month WTI crude oil futures jumped $0.58 or 0.62% to close at $94.14, in a seesaw session, having traded from $92.95 to $94.29 and settling at its highest close for U.S. crude since September, trailing its UK counterpart which saw ...