American Banking and Marketing News reports that Zacks Investment Research recently upgraded shares of Drew Industries from an “underperform” rating to a “neutral” rating in a research note to clients and investors on Monday. The company manufactures and markets components for recreational vehicles and manufactured homes. During the year ended December 31, 2009, the RV Segment accounted for 79 percent of consolidated net sales and the MH Segment accounted for 21 percent of consolidated net sales. Operations are conducted through its wholly owned subsidiaries, Kinro, Inc. and Lippert Components.