Telefónica, S.A. (TEF) stock has risen 12% in the past six months, outperforming the sub-industry and S&P 500's growth of 2.7% and 10.7%, respectively. TEF's stock has outperformed some of its peers in the industry in the past six months. While TELUS Corporation (TU) and BCE Inc (BCE) shares have dropped 7.4% and 5.1%, respectively, shares of Deutsche Telekom AG (DTEGY) have moved up 19.2%. Image Source: Zacks Investment Research Improving financial performance is behind the stock price surge. Telefonica re ...