Warren Buffett understands the insurance industry like few others. Should you follow his lead and purchase Chubb shares?Warren Buffett's Berkshire Hathaway (BRK.A -0.99%) (BRK.B -1.18%) has made news lately for selling stocks, including paring down its large stakes in Apple and Bank of America.But Berkshire Hathaway, known for its patient investment approach, has been scooping up shares of some other companies. That includes insurer Chubb (CB 0.06%). Initially buying 8.1 million shares last year, it now own ...