440 NEW ZEALAND GAZETTE, No. 21 23 FEBRUARY 2007

(b) derive the aggregate risk weighted long position in each time zone (which is the sum of any risk weighted long
positions in the time bands in that time zone) and the aggregate risk weighted short position in each time zone
(which is the sum of any risk weighted short positions in the time bands in that time zone);

(c) derive the matched position in each time zone (which is either the lesser of the absolute value of the aggregate risk
weighted long position and the absolute value of the aggregate risk weighted short position in that time zone, or, if
the absolute values of those positions are equal, that absolute value), if any;

(d) the amount of intra-zone disallowance in a time zone is the value of the matched position in that time zone
multiplied by the disallowance factor for that time zone specified in Table 4. If there is no matched position in
a time zone, the amount of the intra-zone disallowance in that time zone is zero.

Table 4: Intra-zone disallowances

(4) Calculate the amount of the inter-zone disallowances as follows:

(a) inter-zone disallowances are derived in the following order: time zones 1 and 2, 2 and 3, and 1 and 3. The inter-zone
disallowance factors which must be used to derive the inter-zone disallowance amounts are specified in Table 5;

Table 5: Inter-zone disallowances

(b) derive the residual position in each time zone (which is the net amount of the aggregate risk weighted long position
and the aggregate risk weighted short position). If the residual position is positive this is a residual long position
and if it is negative this is a residual short position;

(c) there is a matched position between time zones 1 and 2 if there is a residual long position in one time zone and a
residual short position in the other. The matched position is either the smaller of the absolute value of the residual
long position and the absolute value of the residual short position, or, if the absolute values of those positions are
equal, that absolute value. If there is no matched position, the amount of horizontal disallowance is zero. If there is
a matched position, then the amount of horizontal disallowance between time zones 1 and 2 is the value of the
matched position multiplied by the disallowance factor for time zones 1 and 2 specified in Table 5;

(d) derive the net residual position in time zone 2, by taking the difference between the absolute value of the residual
position in time zone 2 and the matched position between time zones 1 and 2, and allocating to that amount, if any,
the sign of the residual position in time zone 2. If the net residual position in time zone 2 is positive this is a net
residual long position and if it is negative this is a net residual short position;

(e) there is a matched position between time zones 2 and 3 if there is a net residual long position in time zone 2 and
a residual short position in time zone 3 or a net residual short position in time zone 2 and a residual long position in
time zone 3. The matched position is either the smaller of the absolute value of those residual positions, or, if the
absolute values of those positions are equal, that absolute value. If there is no matched position, the amount of
the horizontal disallowance is zero. If there is a matched position then the amount of horizontal disallowance
between time zones 2 and 3 is the value of the matched position multiplied by the disallowance factor for time
zones 2 and 3 specified in Table 5;

(f) derive the net residual position in time zone 1 and in time zone 3:

(i) in time zone 1, by taking the difference between the absolute value of the residual position in time zone 1
and the matched position between time zones 1 and 2, and allocating to that amount, if any, the sign of the
residual position in time zone 1;

(ii) in time zone 3, by taking the difference between the absolute value of the residual position in time zone 3
and the matched position between time zones 2 and 3, and allocating to that amount, if any, the sign of the
residual position in time zone 3,

(if the net residual position in a time zone is positive this is a net residual long position and if it is negative this is a
net residual short position);

(g) there is a matched position between time zones 1 and 3 if there is a net residual long position in one time zone and a
net residual short position in the other. The matched position is either the smaller of the absolute value of the net
residual long position and the absolute value of the net residual short position, or, if the absolute values of those
positions are equal, that absolute value. If there is no matched position, the amount of horizontal disallowance is
zero. If there is a matched position then the amount of horizontal disallowance between time zones 1 and 3 is the
value of the matched position multiplied by the disallowance factor for time zones 1 and 3 specified in Table 5.

(5) The amount of the horizontal disallowance in a single currency is the aggregate of the amounts of intra-zone
disallowances and inter-zone disallowances in that currency.

(6) The horizontal disallowance in a currency shall have the same sign (positive or negative) as the directional risk calculated
for that currency.

7. Aggregate Interest Rate Exposure For All Currencies—A Banking Group’s Aggregate Interest Rate Exposure is the
   greater of the absolute value of the sum of any positive Interest Rate Exposures and the absolute value of the sum of any
   negative Interest Rate Exposures.