Quantitative investing guru James O’Shaughnessy says investors should “completely ignore” the headlines and buy stocks. “You should completely ignore them,” O’Shaughnessy said of headlines on The Wall Street Journal’s Markets Hub. “They really serve to get your mind all whirled up, and you start thinking emotionally, and we think emotional decision making is the bete noire of every investor.” O’Shaughnessy says investors should focus on stocks with high shareholder yield, which is dividend yield plus buyback yield. Among his favorites right now: Seagate Technology.