Goldman Sachs (GS 1.34%), Morgan Stanley (MS 1.01%), and JPMorgan Chase (JPM 1.47%) are some of the biggest market-makers in the world and make billions in revenue from these activities. However, could the implementation of the impending Volcker Rule crush profits? In this segment of The Motley Fool's financials-focused show, Where the Money Is, banking analysts Matt Koppenheffer and David Hanson tell viewers why they think the impact will be minimal.