Section 628.51 - Introduction and exposure measurement(a)General.(1) To calculate its risk-weighted asset amounts for equity exposures that are not equity exposures to an investment fund, a System institution must use the Simple Risk-Weight Approach (SRWA) provided in § 628.52 . A System institution must use the look-through approaches provided in § 628.53 to calculate its risk-weighted asset amounts for equity exposures to investment funds. Equity investments (including preferred stock investments) in other System institutions, service corporations, and the Funding Corporation do not receive a risk weight, because they are deducted from capital in accordance with § 628.22 .(b)Adjusted carrying value. For purposes of §§ 628.51 through 628.53 , the adjusted carrying value of an equity exposure is: (1) For the on-balance sheet component of an equity exposure (other than an equity exposure that is classified as available-for-sale), the System institution's carrying value of the exposure;(2) For the on-balance sheet component of an equity exposure that is classified as available-for-sale, the System institution's carrying value of the exposure less any net unrealized gains on the exposure that are reflected in such carrying value but excluded from the System institution's regulatory capital components;(3) For the off-balance sheet component of an equity exposure that is not an equity commitment, the effective notional principal amount of the exposure, the size of which is equivalent to a hypothetical on-balance sheet position in the underlying equity instrument that would evidence the same change in fair value (measured in dollars) given a small change in the price of the underlying equity instrument, minus the adjusted carrying value of the on-balance sheet component of the exposure as calculated in paragraph (b)(1) of this section; and(4) For a commitment to acquire an equity exposure (an equity commitment), the effective notional principal amount of the exposure is multiplied by the following conversion factors (CFs): (i) Conditional equity commitments with an original maturity of 14 months or less receive a CF of 20 percent.(ii) Conditional equity commitments with an original maturity of over 14 months receive a CF of 50 percent.(iii) Unconditional equity commitments receive a CF of 100 percent.