Warren Buffett's penultimate quarter as Berkshire Hathaway CEO saw the company's operating earnings soar and its cash pile grow to a fresh record of over $350 billion, but the legendary investor once again struggled to find bargains. Berkshire's third-quarter earnings report on Saturday showed a 34% year-on-year surge in operating income to $13.5 billion, as insurance underwriting income nearly tripled to $2.4 billion.Profits also climbed at the BNSF Railway and in the manufacturing, service, and retailing ...