The day Volkswagen briefly conquered the world (2018)
ftalphaville.ft.com
ftalphaville.ft.com
Relevant section:
With 12 per cent of the shares outstanding sold short, it was mathematically impossible for every short-seller to buy a share, and therefore close their position.
In other words, half the room were going to be left in a burning building with no way out. A panicked dash for the exit began.
Edit: for context, I was working for a bank at the time, and implemented the procedure that monitored holdings for the limits above/which reporting requirements would be triggered. The rules are quite extensive, and it was an incredible feat to gain control over such a large share of VW stock without violating any of the actual rules.
I used to work in back office IT for a hedge fund and had to manually set these up in our systems all the time. Currently work for a Mutual Fund. Dont think current employer engages in this.
A triparty agreement is somewhat similar, but well, involves 3 parties instead of 2. Who gets what isn't always immediately clear to a casual observer. These can get quite nuanced and difficult to understand.
One of my favorite points from “The Black Swan” is how Taleb points out that the few biggest market-moving days make up all the action in the market; the days in between are close to noise.
This is also a bit like saying after a car crash “this is such a rare event, all the other times I drove I didn’t crash. So let’s not get too hasty here”