A DoorDash Inc. delivery bag sits on the floor at Chef Geoff’s restaurant in Washington, D.C.Andrew Harrer | Bloomberg | Getty ImagesCheck out the companies making headlines midday Monday:Pfizer, BioNTech — Shares of the drug makers fell 2% and 6% respectively, despite the Food and Drug Administration’s approval of the firms’ Covid-19 vaccine, which is being shipped from Michigan to hundreds of distributions centers across the country.DoorDash — The stock dropped more than 7% after D.A. Davidson slashed its rating on the food delivery company to neutral from buy. D.A. Davidson said the stock’s current valuation appears to leave little room …
