On June 25th, the Group of Governors and Heads of Supervision, the oversight body of the Basel Committee on Banking Supervision, agreed on the methodology for assessing systemic importance for global systemically important banks. The methodology requires global systemically important banks to hold additional capital of between 1 percent and 2.5 percent. To provide a disincentive for banks from becoming larger, an additional 1 percent surcharge could be applied. The methodology will be released for consultation at the end of July. Bank for International Settlements Press Release.