Stocks making the biggest moves in the premarket: Pfizer, DuPont, Wayfair, Shake Shack &amp; more $W $PFE $DD $ABC $CHGG $WBA $SBUX ⁦@OptionsPastor⁩ ⁦@business⁩ ⁦@Barchart⁩ ⁦@TheEconomist⁩  https://t.co/kl2p7LGGKh