Berkshire Hathaway Inc.’s operating earnings surged 71% in the fourth quarter, as higher interest rates lifted the conglomerate’s investment income and its insurance business improved.Operating earnings were $14.5 billion in the three months through December, Warren Buffett’s Omaha, Nebraska-based conglomerate said Saturday in a statement. The increase was driven in part by a 48% jump in insurance investment income, to $4.1 billion, amid higher interest rates. Earnings also got a significant boost from a strong recovery in the firm’s insurance underwriting business, with operating earnings quadrupling over the period to $3.4 billion.GEICO was the main contributor to Berkshire’s insurance results, with its pretax underwriting earnings more than doubling to $7.8 billion in 2024. The auto insurer successfully added new clients in the second half, reversing a years-long trend that previously weighed on its performance.Berkshire said it expects pretax losses of approximately $1.3 billion from the wildfires that ravaged entire parts of Los Angeles last month.Buffett’s cash hoard grew for the 10th quarter in a row, to a record $334.2 billion at the end of 2024, as the billionaire continued to refrain from major stock transactions in the fourth quarter. In the period, the firm was a net seller of $6.7 billion worth of shares.In his annual letter to shareholders, Buffett addressed concerns that Berkshire is hoarding cash and reminded investors that the great majority of the firm’s money remains invested in equities, both public and private, and that this won’t change.“Berkshire will never prefer ownership of cash-equivalent assets over the ownership of good businesses, whether controlled or only partially owned,” Buffett said in the letter.Buffett said the value of the Berkshire’s private equity holdings increased and remained “far greater than the value of the marketable portfolio” last year. Over the same period, Berkshire’s ownership of public equities declined 23%, to $272 billion. The billionaire said Berkshire could increase “over time” its long-time holdings in Itochu, Marubeni, Mitsui, Mitsubishi and Sumitomo, Japan’s five largest trading houses.While Berkshire initially intended to keep its stake below the 10% threshold, the five companies have agreed to “moderately relax the ceiling” as the conglomerate approaches it.The firm declined to buy back its own shares for the second quarter in a row, a sign that Buffett believes the stock is currently trading above its intrinsic value.Berkshire’s market capitalization has been hovering above $1 trillion since late last month.Meet Howie Buffett, Warren Buffett's Successor At Berkshire Hathaway. Read more on Business by NDTV Profit.