Plexus Corp. /zigman2/quotes/208217351/composite PLXS +4.50% warned Monday that fiscal second-quarter revenue could fall below its guidance range because of the coronavirus outbreak. The electronic manufacturing services company said it estimates revenue for the quarter ending March to be negatively impacted by about $40 million from the COVID-19 outbreak, given workforce disruptions in the supply chain. As a results, revenue could fall below the range of $790 million to $830 million that was estimated on Jan. 22; the FactSet consensus is $814 million. The company disclosed in its annual report for fiscal 2019 ended Sept. 28 that 13.2% of its total sales came from China. "While there is uncertainty surrounding the continuing impact this virus may have to the supply chain and our operations, we remain optimistic in our long-term outlook," Chief Executive Todd Kelsey said. The stock, which was still inactive in premarket trading, has dropped 11.1% over the past three months while the Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA +2.68% has shed 8.5%.