The original is valued at the date the pledge was taken into possession. The surviving natural increase is valued at the time of redemption. The two dates need not coincide.
Original share = debt × original value ÷ combined relevant values.
Increase share = debt × increase value ÷ combined relevant values.
This apportionment concerns the particular case of a destroyed original and a surviving dependent increase.
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Two valuation dates in the allocation
Kitab al-Rahn: Storage Costs, Growth and Additional Collateral
The original is valued at the date the pledge was taken into possession. The surviving natural increase is valued at the time of redemption. The two dates need not coincide.
Original share = debt × original value ÷ combined relevant values.
Increase share = debt × increase value ÷ combined relevant values.
This apportionment concerns the particular case of a destroyed original and a surviving dependent increase.