; (B) paid-in share capital, paid in cash; and (C) the United States Treasury, as on-call subscriber to the Bank, in an amount up to $100,000,000,000 in 30-year United States Treasury Bonds. (3) Capital adequacy ratio The Bank shall maintain risk-based capital of no less than 10.0 percent. (4) Limitation on purchase of newly issued public debt The Bank shall not purchase public debt of the United States, as newly issued, except for the purpose of rolling over the existing Treasury holdings of the Bank or to convert the proceeds of cash purchases of the Bank’s preferred stock into Treasury securities. (5) Assessments and phase-in of limitation on capital stock The Bank’s accumulation of capital stock shall be limited— (A) to no more than $150,000,000,000 by the end of its first full fiscal year of operations, following the end of which fiscal year the Board of Governors of the Federal Reserve System shall conduct an assessment of the Bank’s operations and report to Congress and the Bank’s Board concerning the ways in which the Bank is succeeding or falling short in fulfilling the purposes of this Act; (B) to no more than $300,000,000,000 by the end of its third full fiscal year, following the end of which fiscal year the Board of Governors of the Federal Reserve System shall conduct another assessment of the Bank’s operations and submit similar reports to those specified in subparagraph (A), noting in particular the adequacy of the Bank’s response to criticisms and recommendations included in the assessment conducted pursuant to subparagraph (A); (C) to no more than $500,000,000,000 by the end of its fifth full fiscal year, following the end of which fiscal year the Board of Governors of the Federal Reserve System shall conduct another assessment of the Bank’s operations and submit similar reports to those specified in subparagraphs (A) and (B), noting in particular the adequacy of the Bank’s response to criticisms and recommendations included in the assessments conducted pursuant to subparagraphs (A) and (B)