Shares of American Financial Group, Inc. (AFG) have gained 12.4% in the past year, underperforming the industry’s growth of 28.7% and the Zacks S&P 500 composite’s rise of 24.4%.AFG Lags Industry and S&PImage Source: Zacks Investment ResearchBased on the forward 12-month price-to-book ratio, AFG is currently trading at 2.53X, above its 2.31X five-year median and industry average of 1.61X.Its earnings have traditionally been affected by catastrophes. Even drought, which does not otherwise qualify as a catast ...