Large banks "sometimes have to take a position to hedge against exposure," and if the "Volcker Rule covers that type of trading, it is very difficult to stay in business if they can't actively balance their risk in some way," according to McGovern. Mayer says he "would imagine we will see congressional hearings in fairly short order," and let's face it -- we all love these hearings, as we watch executives get grilled. But more importantly, Congress can provide a clear direction for regulators as the Volker Rule is implemented, since "investors are going to want to know whether the institution they are investing in is adopting an approved hedging strategy or is in some exception area, and there may be a premium associated with that," according to Mayer, who adds that "the market is sometimes ahead of the regulators." -- Written by Philip van Doorn in Jupiter, Fla. To contact the writer, click here: Philip van Doorn. To follow the writer on Twitter, go to http://twitter.com/PhilipvanDoorn.