Bloomberg.com writes "MBIA Downgrade to Below AA Poses Threat to Banks, Analysts Say", which says, "The banks would have to buy back unwanted municipal securities if bond insurers' ratings fall below AA and the debt becomes ineligible for money-market funds, according to a research note" from Bank of America.... The Securities and Exchange Commission also may take action to ease credit-rating rules for money market funds, according to the report, citing Chairman Christopher Cox's June 11 comments."