Christie Smythe

The dispute reflects a growing strain on the protocol as many firms are moving to set stricter in-house rules.

Credit Suisse Group was ordered to face a $10 billion lawsuit by New York’s attorney general accusing the Swiss bank of fraud in the sales of mortgage-backed securities before the 2008 financial crisis.

Citigroup agreed to pay $7 billion in fines and consumer relief to resolve government claims that it misled investors about the quality of mortgage-backed bonds sold before the 2008 financial crisis.

Former Bank of America Chairman Kenneth Lewis agreed to a three-year ban on serving as a public company's officer or director and to pay $10 million to settle claims by New York's attorney general that he misled investors about the bank's 2009 purchase of Merrill Lynch.

Morgan Keegan & Co. is going to trial before a judge whose decision to throw out regulators’ claims the retail brokerage misled thousands of investors about the risks of auction-rate securities was reversed on appeal.