Law and regulation The Volcker Rule's Next Frontier: Lawsuits Published December 24, 2013 2:13 PM | Updated February 10, 2020 10:44 AM 1:14 Facebook Twitter LinkedIn Email Regulators have finalized the Volcker Rule governing banks' trading activity, the industry is likely to legally challenge many of the specifics, says Ingmar Bromstrup, a Principal at The Boston Consulting Group.