On December 9, 2014, the Federal Reserve Board (FRB) issued a long-awaited proposal to impose additional capital requirements on the US’s global systemically important banks (G-SIBs). The proposal implements the Basel Committee on Banking Supervision’s (BCBS) G-SIB capital surcharge framework that was finalized in 2011, but also proposes changes to BCBS’s calculation methodology resulting in significantly higher surcharges for US G-SIBs compared with their global peers.
The proposal, which we expect will be finalized in 2015, requires US G-SIBs to hold additional capital (Common Equity Tier 1 (CET1) as a percentage of Risk Weighted Assets (RWA)) equal to the greater of the amount calculated under two methods. The first method is consistent with BCBS’s framework, and calculates the amount of extra capital to be held based on the G-SIB’s size, interconnectedness, cross-jurisdictional activity, substitutability, and complexity. The second method is introduced by the US proposal, and uses similar inputs but replaces the substitutability element with a measure based on a G-SIB’s reliance on short-term wholesale funding (STWF).