Action alleges a 15-year pattern involving complex financial instruments called credit default swaps. : There may be an issue with the delivery of your newspaper. This alert will expire at NaN. Click here for more info. .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... The state of New Mexico filed a class action lawsuit against some of the largest financial institutions in the country alleging a 15-year pattern of manipulating the market for complex financial instruments called credit default swaps.