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Earnings results sent retail stocks to some of the markets best and worst premarket moves. Signet Jewelers (SIG), Titan Machinery (TITN) and Tilly's (TLYS) all clocked double-digit gains. Dollar TreeDLTR and Dollar General (DG) suffered early losses, as did Salesforce.com (CRM) and Davita Healthcare (DVA). Tilray (TLRY) led a pullback among cannabis stocks early Thursday, as the group paused for a breather after Wednesday's breathtaking gains.

Dow futures slipped 0.2%, while S&P 500 and Nasdaq 100 futures narrowed their losses to a fraction. Apple (AAPL) led the Dow, up 0.3% and on track to open at another new high. Dollar Tree posted the steepest drop among S&P 500 and Nasdaq 100 stocks.

Negotiators in Washington worked frantically ahead of a U.S.-imposed Friday deadline for Canada to join a revised trade agreement worked out between the U.S. and Mexico. The Trump administration brought Canada into the negotiations late, on Tuesday, then laid down a Friday deadline — aiming to earn U.S. congressional approval before a Dec. 1 change in government in Mexico.