CA-8.4.3
The first dimension of the matrix involves a specified range of changes in the
(a) Interest rate related instruments - The range for interest rates is consistent with the assumed changes in yield set out in Section CA-4.5. Those banks using the alternative method of grouping time-bands into sets, as explained in Paragraph CA-8.4.2, should use, for each set of time-bands, the highest of the assumed changes in yield applicable to the individual time-bands in that group. If, for example, the time-bands 3 to 4 years, 4 to 5 years and 5 to 7 years are combined, the highest assumed change in yield of these three bands would be 0.75 which would be applicable to that set.
(b) For equity instruments, the range is ±8%.
(c) For foreign exchange and gold, the range is ±8%.
(d) For commodities, the range is ±15%,
For all risk categories, at least seven observations (including the current observation) should be used to divide the range into equally spaced intervals.
October 07