CA-9.5.1

Past version: Effective from 01 Apr 2008 to 31 Mar 2011
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The duration method is an alternative approach to measuring the exposure to parallel and non-parallel shifts in the yield curve, and recognises the use of duration as an indicator of the sensitivity of individual positions to changes in market yields. Under this method, banks may use a duration-based system for determining their general interest rate risk capital requirements for traded debt instruments and other sources of interest rate exposures including derivatives. A worked example of the duration method is included in Appendix CA-12. The various time-bands and assumed changes in yield, relevant to the duration method, are illustrated below.

Duration method: time-bands and assumed changes in yield

  Time-band Assumed change in yield
Zone 1 1 month or less 1.00
1 to 3 months 1.00
3 to 6 months 1.00
6 to 12 months 1.00
Zone 2 1 to 1.9 years 0.90
1.9 to 2.8 years 0.80
2.8 to 3.6 years 0.75
Zone 3 3.6 to 4.3 years 0.75
4.3 to 5.7 years 0.70
5.7 to 7.3 years 0.65
7.3 to 9.3 years 0.60
9.3 to 10.6 years 0.60
10.6 to 12 years 0.60
12 to 20 years 0.60
> 20 years 0.60
Apr 08