What makes an arrangement an 'iska' rather than a standard partnership?
Halacha 1: An iska is defined by the fact that only one partner actively conducts business (the administrator), while the other (the investor) is passive. When both trade actively, it is a regular partnership.
Question 2
In a standard iska with no wage paid and no special stipulation, if there is a profit, how much does the administrator receive?
Halacha 3: The administrator receives 2/3 of the profit — half for his share of the loan portion, and 1/6 as his wage for managing the deposit portion. The investor receives 1/3.
Question 3
In a default iska, if there is a loss, how much must the administrator bear?
Halacha 3: The administrator bears 1/3 of the loss — he is liable for half (the loan portion) but receives 1/6 as his wage credit for the deposit portion, netting to 1/3. The investor bears 2/3.
Question 4
Why does having another occupation allow for more flexible profit-sharing arrangements in an iska?
Halacha 2: If the administrator has another occupation, even a nominal token payment for the entire period suffices as his 'wage.' This removes the ribbit concern and allows equal profit-and-loss splits.
Question 5
What was Rambam's critique of his teachers' formulas for non-standard iska ratios?
Halacha 5: Rambam shows that his teachers' formula can produce absurd results — an administrator losing money yet receiving payment from the investor. He declares this as unacceptable and proposes his own formula maintaining consistent proportionality.