Default Risk Capital Requirement for Securitisations (CTP)
| No: 44047144 | Date(g): 27/12/2022 | Date(h): 4/6/1444 |
Effective from Jan 01 2023 - Dec 31 2022
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| Gross jump-to-default risk positions (gross JTD) | |||
| 8.36 | For the computation of gross JTD on securitisations (CTP), the same approach must be followed as for default risk-securitisations (non-CTP) as described in [8.27]. | ||
| 8.37 | The gross JTD for non-securitisations (CTP) (ie single-name and index hedges) positions is defined as their market value. | ||
| 8.38 | Nth-to-default products should be treated as tranched products with attachment and detachment points defined below, where “Total names” is the total number of names in the underlying basket or pool: | ||
| (1) | Attachment point = (N – 1) / Total names | ||
| (2) | Detachment point = N / Total names | ||
| Net jump-to-default risk positions (net JTD) | |||
| 8.39 | Exposures that are otherwise identical except for maturity may be offset. The same concept of long and short positions from a perspective of loss or gain in the event of a default as set out in [8.10] and offsetting rules for non-securitisations including scaling down positions of less than one year as set out in [8.15] to [8.18] apply to JTD risk positions for securitisations (non-CTP). | ||
| (1) | For index products, for the exact same index family (eg CDX.NA.IG), series (eg series 18) and tranche (eg 0–3%), securitisation exposures should be offset (netted) across maturities (subject to the offsetting allowance as described above). | ||
| (2) | Long and short exposures that are perfect replications through decomposition may be offset as follows. When the offsetting involves decomposing single name equivalent exposures, decomposition using a valuation model would be allowed in certain cases as follows. Such decomposition is the sensitivity of the security’s value to the default of the underlying single name obligor. Decomposition with a valuation model is defined as follows: a single name equivalent constituent of a securitisation (eg tranched position) is the difference between the unconditional value of the securitisation and the conditional value of the securitisation assuming that the single name defaults, with zero recovery, where the value is determined by a valuation model. In such cases, the decomposition into single-name equivalent exposures must account for the effect of marginal defaults of the single names in the securitisation, where in particular the sum of the decomposed single name amounts must be consistent with the undecomposed value of the securitisation. Further, such decomposition is restricted to vanilla securitisations (eg vanilla CDOs, index tranches or bespokes); while the decomposition of exotic securitisations (eg CDO squared) is prohibited. | ||
| (3) | Moreover, for long and short positions in index tranches, and indices (non- tranched), if the exposures are to the exact same series of the index, then offsetting is allowed by replication and decomposition. For instance, a long securitisation exposure in a 10–15% tranche vs combined short securitisation exposures in 10–12% and 12–15% tranches on the same index/series can be offset against each other. Similarly, long securitisation exposures in the various tranches that, when combined perfectly, replicate a position in the index series (non-tranched) can be offset against a short securitisation exposure in the index series if all the positions are to the exact same index and series (eg CDX.NA.IG series 18). Long and short positions in indices and single-name constituents in the index may also be offset by decomposition. For instance, single-name long securitisation exposures that perfectly replicate an index may be offset against a short securitisation exposure in the index. When a perfect replication is not possible, then offsetting is not allowed except as indicated in the next sentence. Where the long and short securitisation exposures are otherwise equivalent except for a residual component, the net amount must show the residual exposure. For instance, a long securitisation exposure in an index of 125 names, and short securitisation exposures of the appropriate replicating amounts in 124 of the names, would result in a net long securitisation exposure in the missing 125th name of the index. | ||
| (4) | Different tranches of the same index or series may not be offset (netted), different series of the same index may not be offset, and different index families may not be offset. | ||
| Calculation of default risk capital requirement for securitisations (CTP) | |||
| 8.40 | For default risk of securitisations (CTP), each index is defined as a bucket of its own. A non- exhaustive list of indices include: CDX North America IG, iTraxx Europe IG, CDX HY, iTraxx XO, LCDX (loan index), iTraxx LevX (loan index), Asia Corp, Latin America Corp, Other Regions Corp, Major Sovereign (G7 and Western Europe) and Other Sovereign. | ||
| 8.41 | Bespoke securitisation exposures should be allocated to the index bucket of the index they are a bespoke tranche of. For instance, the bespoke tranche 5% - 8% of a given index should be allocated to the bucket of that index. | ||
| 8.42 | The default risk weights for securitisations applied to tranches are based on the corresponding risk weights for the banking book instruments, as set out in 18 to 22 of SAMA Minimum Capital Requirements for Credit Risk, with the following modification: the maturity component in the banking book securitisation framework is set to zero, ie a one-year maturity is assumed to avoid double-counting of risks in the maturity adjustment (of the banking book approach) since migration risk in the trading book will be captured in the credit spread capital requirement.. | ||
| 8.43 | For the non-tranched products, the same risk weights for non-securitisations as set out in [8.24] apply. For the tranched products, banks must derive the risk weight using the banking book treatment as set out in [8.42]. | ||
| 8.44 | Within a bucket (ie for each index) at an index level, the capital requirement for default risk of securitisations (CTP) is determined in a similar approach to that for non-securitisations. | ||
| (1) | The hedge benefit ratio (HBR), as defined in [8.23], is modified and applied to net short positions in that bucket as in the formula below, where the subscript ctp for the term HBRctp indicates that the HBR is determined using the combined long and short positions across all indices in the CTP (ie not only the long and short positions of the bucket by itself). The summation of risk-weighted amounts in the formula spans all exposures relating to the index (ie index tranche, bespoke, non-tranche index or single name). | ||
| (2) | A deviation from the approach for non-securitisations is that no floor at zero applies at the bucket level, and consequently, the DRC requirement at the index level (DRCb) can be negative. | ||
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| 8.45 | The total DRC requirement for securitisations (CTP) is calculated by aggregating bucket level capital amounts as follows. For instance, if the DRC requirement for the index CDX North America IG is +100 and the DRC requirement for the index Major Sovereign (G7 and Western Europe) is - 100, the total DRC requirement for the CTP is 100 - 0.5 × 100 = 50.37 | ||
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37 The procedure for the DRCb and DRCctp terms accounts for the basis risk in cross index hedges, as the hedge benefit from cross-index short positions is discounted twice, first by the hedge benefit ratio HBR in DRCb, and again by the term 0.5 in the DRCCtp equation.