NEW YORK ( TheStreet) -- Shares of USG ( USG) are rallying on Tuesday amid the optimistic trading that followed the first major corporate earnings of the season, from Alcoa ( AA) and CSX ( CSX). Shares of USG were recently trading at a gain of 10%, or $1.22, to a share price near $13.50. USG, a major player in the building materials segment for the residential and commercial construction industries, has been a long-time portfolio holding of Berkshire Hathaway ( BRK.B). Not all investors, of course, hold USG for Warren Buffett's preferred holding period of "forever." USG is also a stock where Warren Buffett and Wall Street are typically at odds, with the consensus Street view of USG tilted to the negative. USG has been a volatile stock in recent trading. At the end of June, USG shares dropped 8.6%, the most since Oct. 21, after Credit Suisse maintained an "underperform" rating, saying the building material company's revenue might be hurt by falling wallboard prices. USG shares fell to a recent low of $11.50 at the beginning of July, and haven't been above the 13% mark since the Credit Suisse rating update. The building materials company remains well of its 52-week high, reached in May, above $25. -- Written by Eric Rosenbaum from New York Follow TheStreet.com on Twitter and become a fan on Facebook.