SUGAR LAND, TX--(Marketwire - February 7, 2011) - Researched by Industrial Info Resources (Sugar Land, Texas) -- Constellation Energy Group Incorporated (NYSE:CEG) (Baltimore, Maryland), a leading U.S. supplier of power, natural gas and energy products, faced a challenging fourth-quarter and full-year 2010 as mark-to-market losses and impairment charges on investments weakened earnings from the company's utilities. However, these investments significantly increased the company's generation capacity, such as in clean generation, which saw 36 megawatts of solar power added.