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C. Alternative Capital Treatment for STC-Compliant Securitisations

C 52/2017 STA يسري تنفيذه من تاريخ 1/12/2022

84.Securitisation transactions that are assessed as STC-compliant for capital purposes shall be subject to securitisation capital requirements as modified by this Standard. The resulting risk weights are subject to a floor risk weight of 10% for senior tranches, and 15% for non-senior tranches.

1.External Ratings-Based Approach for STC Securitisation Exposures
 

85.When the SEC-ERBA is used, for exposures with short-term ratings or an inferred rating based on a short-term rating, the risk weights in Table 3 apply.

Table 3: SEC-ERBA risk weights for STCs with short-term ratings

External credit assessmentA-1/P-1A-2/P-2A-3/P-3All other ratings
Risk weight10%30%60%1250%

 

86.For STC exposures with long-term ratings, risk weights under SEC-ERBA are determined according to Table 4, with adjustments for tranche maturity and (for non-senior tranches) tranche thickness as discussed above in this Standard for non-STC exposures.

Table 4: SEC-ERBA risk weights for STCs with long-term ratings
(Subject to adjustment for tranche maturity and tranche thickness)

RatingSeniorNon-senior (thin) tranche
Tranche maturity (MT)Tranche maturity (MT)
1 year5 year1 year5 year
AAA10%10%15%40%
AA+10%15%15%55%
AA15%20%15%70%
AA–15%25%25%80%
A+20%30%35%95%
A30%40%60%135%
A–35%40%95%170%
BBB+45%55%150%225%
BBB55%65%180%255%
BBB–70%85%270%345%
BB+120%135%405%500%
BB135%155%535%655%
BB–170%195%645%740%
B+225%250%810%855%
B280%305%945%945%
B–340%380%1015%1015%
CCC+/CCC/CC415%455%1250%1250%
Below CCC–1250%1250%1250%1250%

 

2.Standardized Approach for STC Securitisation Exposures
 

87.If a bank uses the SEC-SA for an STC securitisation exposure, the bank should set the supervisory parameter p equal to 0.5. The SEC-SA framework is otherwise unchanged for STC exposures.