How does that work? When you short, you immediately sell the shares you borrowed. Why aren't those shares available to be re-borrowed from the new owner? The on

How does that work? When you short, you immediately sell the shares you borrowed. Why aren't those shares available to be re-borrowed from the new owner? The only reason I can guess is that the new owner isn't connected to the liquidity system, which I would guess would have been a solved problem by now.