I am trying to understand why would someone lend you stocks despite commissions for you to short on stock exchange market.
If you borrow stocks from someone and price of stocks goes down, you get money, but he looses it.
before:
1_stock = 100 USD
now:
1_stock = 75 USD
In this case 1_stock lost value. Now the lender gets his stock back and he lost 25$. I don't see any reason why people would lend their stock. Is there any math behind, like probability calculation on earning on fees or something?