Shares of energy companies rose, but not by as much as the broad market, as oil futures closed at a two-week low.
Oil prices fell amid skepticism that Saudi Arabia's one million-barrels-per day voluntary output cut and Russia's 300,000 barrel a day would make a significant difference to global oil supplies.
World leaders gathered for climate talks in Dubai amid sharp divisions over how quickly governments need to wean their economies off fossil fuels to prevent the planet from blowing past the Paris accord's temperature targets.
Hostilities recommenced in Gaza as negotiators desperately sought to revive a ceasefire that broke down Friday.
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(END) Dow Jones Newswires