New York’s highest court yesterday reinstated a $5 billion lawsuit brought by a group of banks, including Bank of America and Wells Fargo, against insurance giant MBIA. ABN AMRO Bank, et al. v. MBIA Inc., et al., — N.E. 2d –, 2011 WL 2534059, slip op. (June 28, 2011). The Plaintiffs-banks sought to annul MBIA’s 2009 restructuring, which separated the insurer’s municipal bond business from its troubled structured finance unit, on the grounds that the transactions left the insurer incapable of paying insurance claims in violation of New York’s Debtor and Creditor Law. The Superintendent of Insurance in New York approved the transactions that effectuated the split of MBIA’s business in 2009.

The Court of Appeals’ decision represents a victory for Wall Street banks in one of the many battles being fought in connection with the collapse of the financial markets. Those banks saw their fraudulent transfer claims against MBIA dismissed earlier this year by the Appellate Division, First Department. The intermediate appellate court determined that the banks’ fraudulent transfer claims were a “collateral attack” on the Superintendent’s authorization of the restructuring and that an Article 78 proceeding challenging that authorization was the sole remedy available to the Plaintiffs. The banks’ remedies under Article 78 – a procedure entitling aggrieved parties to challenge agency decisions – would be limited compared to those remedies available in state or federal court under a fraudulent transfer theory.