Market breadth, a measure of how many stocks are rising versus the number that are dropping, has turned “exceedingly negative,” according to Brad Lamensdorf, a portfolio manager at Ranger Alternative Management. Lamensdorf writes the Lamensdorf Market Timing Report newsletter and runs the AdvisorShares Ranger Equity Bear ETF HDGE, -0.64% an exchange-traded fund that “shorts” stocks, or bets that they will fall. “As the indexes continue to produce a series of higher highs, subsurface conditions are painting an entirely different picture,” Lamensdorf wrote in the latest edition of the newsletter. He noted that the year-to-date advance in equities — the S&P...