ServiceNow’s stock just had its worst day ever, taking the software sector down with it

servicenow shares fell more than 20% on thursday — their worst single-day drop ever. the rout dragged down a prominent software etf, which posted its biggest daily decline in a year. one analyst said there's "no room for nuance" in the sector right now. the selloff hit other software names too, though servicenow took the hardest blow. the company's earnings report disappointed on forward guidance, and investors punished the stock hard. the broader software etf is now down roughly 10% from its recent high.