Berkshire Hathaway Inc, the conglomerate run by billionaire Warren Buffett, on Saturday reported a 67 percent increase in quarterly operating profit, as insurance underwriting rebounded and several businesses benefited from a growing economy and improving demand.

Results easily topped analyst forecasts. Underwriting profit at the Geico auto insurance unit more than quintupled, the BNSF railroad benefited from demand to ship consumer products, grain, petroleum and steel, and the Berkshire Hathaway Automotive car dealership financed more vehicle purchases.

"Good results across the board," said Doug Kass, who runs the hedge fund Seabreeze Partners Management Inc in Palm Beach, Florida. He has at times in recent years sold Berkshire shares short, betting on a decline.

Berkshire also said net income in the second quarter nearly tripled to more than $12 billion, though that reflected a new accounting rule requiring that it report unrealized gains on its stock investments with earnings.

Buffett says that rule distorts net results and can mislead investors.

Operating profit rose to $6.89 billion, or roughly $4,190 per Class A share, from $4.12 billion, or $2,505 per share, a year earlier.

Analysts on average expected operating profit of $3,387 per share, according to Thomson Reuters I/B/E/S.

Net income rose to $12.01 billion, or $7,301 per Class A share, from $4.26 billion, or $2,592 per share, a year earlier.

Results also reflected a decline in Berkshire's effective income tax rate, to 20 percent from 28.9 percent, following last year's cut in the federal corporate tax rate.

Berkshire is based in Omaha, Nebraska, and has more than 90 businesses in the insurance, chemicals, energy, food and retail, industrial parts, railroad and other sectors.

Reuters