Notice of proposed rulemaking clarifying revisions (proposed rule) to the Board of Governors of the Federal Reserve System's rule regarding risk-based capital surcharges for U.S. based global systemically important bank holding companies (GSIB surcharge rule). The proposed rule would modify the GSIB surcharge rule to provide that a bank holding company subject to the rule would continue to calculate its method 1 and method 2 GSIB surcharge scores annually using data as of December 31 of the previous calendar year, even though the date will be due quarterly beginning with the June 30, 2016, report. In addition, the proposed rule would clarify that a bank holding company subject to the GSIB surcharge rule is required to calculate its method 2 GSIB surcharge score using systemic indicator amounts expressed in billions of dollars even though the date is reported in millions of dollars. The preamble to the proposed rule also provides clarifying information on how a covered bank holding company should calculate its short-term wholesale funding score for purposes of calculating its method 2 score under GSIB surcharge rule.