 Shares of Exelon Corp. EXC, -2.73 pulled back 2.7 in afternoon trading Monday, putting them on track to snap an eight-session win streak, after Mizuho analyst Paul Fremont downgraded the utility services holding company, citing an uncertain outlook for President Bidens Build Back Better plan. The stock had rallied 8.2 during the streak to close Friday at the highest price since February 2009. 