Top gainers in the sector included M.D.C. Holdings, Inc. (NYSE: MDC ), Delta Apparel, Inc. (NYSE: DLA ), and Commercial Vehicle Group, Inc. (NASDAQ: CVGI ). Top Headline Dean Foods Co (NYSE: DF ) posted weaker-than-expected earnings for its first quarter on Tuesday. Shares of CPI Aerostructures, Inc. (NYSE: CVU ) got a boost, shooting up 25 percent to $7.10 after the company posted upbeat Q1 results.