WASHINGTON AP _ The man who nearly 40 years ago co-founded what is now the nation’s largest mortgage lender is being scrutinized by federal securities regulators as they examine his sales of the struggling company’s stock.

The Securities and Exchange Commission’s informal inquiry into Countrywide Financial Corp. Chief Executive Angelo R. Mozilo has been under way for a while, a person familiar with the matter said Wednesday. The person spoke on condition of anonymity because the probe has not been made public.