One effect of the Volcker rule at Goldman Sachs Group is that the bank has reduced its pledges of capital to investment funds by almost 50%. That works out to $5.8 billion. The Volcker rule would limit banks to investing no more than 3% of Tier 1 capital. As of March 31, Goldman's Tier 1 commitments were at 14%. Goldman's target is to eliminate that in seven years.