If the financier's 80% share is divided into eight units of 10% each and the client buys one unit every three months, the financier's share gradually falls. Rent must fall with it because rent is charged only for the financier's remaining ownership. Rent and unit purchase price therefore perform different legal functions.
Rent is justified by use of an owned share, so it should track the ownership that actually remains with the lessor. If ownership falls, the rentable share also falls.
Opening interactive controls...
Diminishing Partnership (المشاركة المتناقصة): The Core Idea
If the financier's 80% share is divided into eight units of 10% each and the client buys one unit every three months, the financier's share gradually falls. Rent must fall with it because rent is charged only for the financier's remaining ownership. Rent and unit purchase price therefore perform different legal functions.
Rent is justified by use of an owned share, so it should track the ownership that actually remains with the lessor. If ownership falls, the rentable share also falls.