Municipal bond insurer Assured Guaranty Ltd. has filed suit against JPMorgan Chase Bank NA with regards to the sale of mortgage-backed securities by Bear Stearns & Co. JPMorgan acquired Bear Stearns in 2008.

In July 2010, Assured sued the branch of Bear Stearns — EMC — that had issued the securities. The current suit revises the case by adding JPMorgan as a defendant and including references to claims by more than 35 witnesses.

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