The OP leads to a broken (most likely removed) thread, so here is the archived thread: https://www.reveddit.com/v/wallstre...dde3ab5dcf&utm_source=embedly&utm_term=l97ykd
This 140% short can be caused by 2 different issues: 1. Naked shorting. Illegal. 2. Multiple shorting of the same stock. Legal. 3. Well, a combination of both. At this point it is unclear which one caused the going over 100% of the float. I wouldn't be surprised if the brokerages let HFs to short shares what weren't located, aka naked. Quote from the thread: "Michael Burry tweeted yesterday that when he called in his lent-out GME shares, it took his broker WEEKS to find them."