So when you lend shares out to a 3rd party, they deliver the 102% collateral in cash to IB (I assume that they deliver cash and not a form of credit or type of payment that requires a few days for clearing). So then that cash is deposited into the owner's account which should then be protected in the same way that your other cash is protected. IB even has some program where they split up your cash into multiple accounts held at separate banks to maximize the FDIC protection (Insured Bank Deposit Sweep Program -h
ttps://www.interactivebrokers.com/en/index.php?f=27462). I think the cash collateral is deposited into the user's account from this quote from the link that I posted above:
"Customers who participate in the program will receive cash collateral to secure the return of the stock loan at its termination as well as interest on the cash collateral provided by the borrower for any day the loan exists."
Key phrase is "customers...will receive cash collateral..." instead of customers will receive a credit or some other type of wording like that. So even if IB goes bankrupt, that cash collateral should be indistinguishable from other cash held in the user's account and subject to FDIC protection?
I think the stock yield for loaned shares is completely different from commissions. What do stock and ETF borrowing rates have to do with transaction costs?