Patterson-UTI Energy, Inc. PTEN has seen its stock fall about 15 percent in reaction to its fourth quarter results, which prompted one Wall Street analyst to encourage investors buy the dip. The Analyst BMO Capital Markets' Daniel Boyd upgraded Patterson-UTI Energy's stock from Market Perform to Outperform with an unchanged $24 price target. SourceAn upside trend will start to form. $PTEN, Patterson-UTI Energy, Inc. / D