JRD1
Member
Real shares only need to exist when someone sells their shares or asks for a certificate. Until then it's all numbers in a database.
A person whose shares are lent out has no certificates, they only have a number in their trading app that says how many shares they own/ control. The broker lends shares from A to B and B sells to C. Either A or C can sell their 'shares' at any time, making them actual ones for a moment and the broker only hits up B for them if the pool of shares to lend dries up. If C also has a margin account, they might not even have 'real' shares for long.
Just like when you deposit cash in a bank, they do not have your serial numbered bills (or even the total amount on hand of all deposits). However, people can withdraw 'their'; money at any time.
Post event, each lent share becomes 5 lent shares. Each person's account showes 5x more shares, and the brokerage has 5x more real shares and 5x more lent shares to track. Nothing fundamentally changes.
Agree - and that database is also double entry balanced accounting so debits and credits have to balance. Which is how the 'additional' shares get added.
Another way to think of this:
If today the US Treasury declared that every current US dollar splits into 5 'new' dollars at 5pm eastern, would everyone that has a loan have to cover their loan and re-borrow 'new' dollars at 5:00:01pm? Would only a person with a physical dollar in their pocket get the 'new' dollars?
No - every 'dollar' entry would be multiplied by 5 across the entire system and it all would be balanced out. The holders of 'real' dollars would receive the new dollars directly from the treasury but they would then backflush through the system through electronic entries in all the double entry balanced accounting systems through the linked assets/liabilities.
Naked shorts - different story. Maybe the analogy of 'counterfeit money' is appropriate there.