..."The episode also may lead more money market funds to insure their holdings. About one fourth of all money fund assets are now insured, Crane said. Fidelity, Janus, Vanguard and Federated already insure every bit of their money market portfolios."...

Above from article posted from cbsmarketwatch.

Does anyone know where to read more about this insurance, is it the sipc or seperate? Does this insurace mean these particular companys funds are safer?