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Retained Earnings and Regulatory Capital Requirements (Tables)
3 Months Ended
Mar. 31, 2021
Retained Earnings Note Disclosure [Abstract]  
Capital Amounts and Ratios in Accordance With Current Banking Regulations The following table summarizes the capital amounts and ratios of HSBC USA and HSBC Bank USA, calculated in accordance with the Basel III rule at March 31, 2021 and December 31, 2020:
March 31, 2021December 31, 2020
  
Capital
Amount
Well-Capitalized 
Ratio(1)
 Actual
Ratio
Capital
Amount
Well-Capitalized
Ratio(1)
 Actual
Ratio
 (dollars are in millions)
Common equity Tier 1 ratio:(4)
HSBC USA$16,154 4.5 %
(2)
15.1 %$15,891 4.5 %
(2)
14.5 %
HSBC Bank USA18,374 6.5 17.2 18,180 6.5 16.4 
Tier 1 capital ratio:(4)
HSBC USA17,419 6.0 16.2 17,156 6.0 15.6 
HSBC Bank USA20,874 8.0 19.6 20,680 8.0 18.7 
Total capital ratio:(4)
HSBC USA20,080 10.0 18.7 20,680 10.0 18.8 
HSBC Bank USA23,314 10.0 21.8 23,303 10.0 21.1 
Tier 1 leverage ratio:
HSBC USA17,419 4.0 
(2)
8.8 17,156 4.0 
(2)
8.6 
HSBC Bank USA20,874 5.0 10.5 20,680 5.0 10.3 
Supplementary leverage ratio ("SLR"):
HSBC USA17,419 3.0 
(3)
8.3 17,156 3.0 
(3)
7.8 
HSBC Bank USA20,874 3.0 
(3)
9.9 20,680 3.0 
(3)
9.3 
Risk-weighted assets:(4)(5)
HSBC USA107,232 109,809 
HSBC Bank USA106,758 110,682 
Adjusted quarterly average assets:(6)
HSBC USA197,127 198,698 
HSBC Bank USA198,580 200,026 
Total leverage exposure:(7)
HSBC USA209,808 221,216 
HSBC Bank USA210,105 221,334 
(1)HSBC USA and HSBC Bank USA are categorized as "well-capitalized," as defined by their principal regulators. To be categorized as well-capitalized under regulatory guidelines, a banking institution must maintain capital equal to or in excess of the ratios reflected in the above table, and must not be subject to a directive, order, or written agreement to meet and maintain specific capital levels.
(2)There are no common equity Tier 1 or Tier 1 leverage ratio components in the definition of a well-capitalized bank holding company. The ratios shown are the regulatory minimums.
(3)There is no SLR component in the definition of a well-capitalized banking institution. The ratios shown are the regulatory minimums.
(4)During the first quarter of 2021, it was determined that certain collateral did not qualify for risk-weighted asset reduction purposes under U.S. capital rules. As a result, reported risk-weighted assets were understated and reported Common equity Tier 1 capital, Tier 1 capital and Total capital ratios were overstated at HSBC USA and HSBC Bank USA at December 31, 2020. We have revised December 31, 2020 amounts to conform to the current period presentation. The following table summarizes the impact of this change on reported risk-weighted assets and capital ratios as of December 31, 2020:
December 31, 2020
As Previously ReportedAs Revised
HSBC USAHSBC Bank USAHSBC USAHSBC Bank USA
(in millions)
Common equity Tier 1 ratio14.7 %17.2 %14.5 %16.4 %
Tier 1 capital ratio15.9 %19.6 %15.6 %18.7 %
Total capital ratio19.2 %22.0 %18.8 %21.1 %
Risk-weighted assets$107,808 $105,681 $109,809 $110,682 
(5)Calculated using the generally-applicable Standardized Approach.
(6)Represents the Tier 1 leverage ratio denominator which reflects quarterly average assets adjusted for amounts permitted to be deducted from Tier 1 capital.
(7)Represents the SLR denominator which includes adjusted quarterly average assets plus certain off-balance sheet exposures.