Shares in retailer WH Smith opened about 17% lower, although they've subsequently recovered some ground and are trading about 12% lower in mid-morning trade.
Earlier, the retailer whose travel division has outlets in airports and railway stations in Asia Pacific, the UK, Europe and the US, as well as its High Street stores, issued a sales and profit warning in the light of the potential impact of coronavirus on its business.
"You have to feel a little little sorry for a company that has done a brilliant job of pivoting away from the struggling British High Street to driving all its revenue and profit growth from airports and train stations," said Markets.com chief market analyst Neil Wilson. , .
"A rapid decline in footfall at travel sites because of the coronavirus is hitting revenues and will result in a material decline in profits this year. Trump’s 30-day European travel ban only makes things worse and threatens to make today’s estimates only partially reflective of the level of damage that could be done this year."