NEW YORK (MarketWatch) -- Massey Energy /quotes/comstock/13*!mee/quotes/nls/mee (MEE 46.64, -0.08, -0.17%) on Monday drew an upgrade to buy from hold at S&P Equity Research, while analysts cut their 2010 earnings estimate by 7 cents a share to $2.55 a share on production losses and costs following an explosion that killed 29 miners. "We believe that the financial impact of the Upper Big Branch mine tragedy to Massey Energy will be immaterial," S&P said in a note to clients. "Our opinion is based on our analysis of industry mining accidents, Massey's indemnification to litigation via insurance, and our belief that the company has ample capacity to mitigate most of the 1.6 million tons of production that was expected to be sold from Upper Big Branch |