Variable Prepaid Forward Kesuba.
I was thinking, that we really need a way to reform the kesuba. After all, she may be worth 200 zuz when you marry her, (like suppose her father has a lot of money), but that value could change over time. It really is silly for you to have to bear such risk whenever you get married.
So perhaps we can suggest a version based on the Variable Prepaid Forward Contract. In a VPFC, suppose you have 100 shares of stock worth 1 dollar each. What you do, is you contract to deliver a variable amount of those shares to the bank in 10 years, based on the price at delivery. Then, they give you about 80% of the value now. Then, the most you have to deliver is all 100 shares, but if they go up in value, then you only need to deliver the amount of shares worth 100 dollars. But, the least you can deliver is say 67 shares, so that the bank will win if it goes above 150.
So we can do the same thing with kesubas. You calculate the kesuba as a variable contract based on the father’s net worth at divorce, and of course adjusted for things like dress size at divorce (like in a VPFC, they also adjust for dividends).
Plus, instead of doing challipin with a ring from her, they can do the challipin with a credit card from her father.