Insurance Probes Who's next?

NEW YORK (CNN/Money) - Regulators are scrutinizing "retroactive" insurance policies, leading some investors to worry that Berkshire Hathaway will be caught up in the probe, a newspaper reported Friday.

In a 2003 annual report, Warren Buffett said the investment company had sold retroactive insurance policies, which can help corporate clients boost their financial statements, the Wall Street Journal said. Such policies do not constitute a large part of Berkshire's revenue base.

According to the newspaper, Buffett in the company's annual report called them, "a few jumbo policies that are likely to produce underwriting losses... but also provide unusually large amounts of float," or money for Berkshire to invest.