My 2cents. I was part of a massive selloff after a huge runup in another domain and sat and sold for hours every day for about a month, all day looking and red and green numbers flashing through the screen like The Matrix.
While it is hard to unload huge amounts without crashing the market, understand that it’s not a team effort, it is short vs short and long vs long when it comes to unloading.
As a medium whale you can keep track of the bigger whales, but in the end it’s a few percent gain for a lot of lost sleep if you really try to be greedy. (Fwiw I tried to be greedy, next time I will probably be less greedy.) If you have a position of say $1M you want to cover you might aswell get it over with in one day, do 10 sell walls 0.1% above last trade of $100k spaced out randomly over the day, if not filled within 5minutes move the sell wall. If it is $100M you might do it in week and crash the market a percent or two. Often you look for a buy wall on the other side and just eat that wall, crash the market 0.1-0.5% which it recovers the second after your order but at least you can go back to drinking margaritas. There are some bots making some percent profit for trades inbetween the walls, but they also compete with each other driving down margins.*
The bigger players often hire people to do the selling for them over a time, often these people just supervise a bot doing it for them. It can be a scripted bot they just sells 10shares/second, sure you lose a litte margin to bots trying to exploit you, but the bots will compete for the profit so telegraphing your strategy is not really that expensive.
My take on current short interest. Shorts have been covering. This has likely caused and also been caused by the raise in the share prices. I would guess that this trend will continue, but also that this is already priced in. With more shorts covering, S&P buying there will also be a lot of people selling just waiting to do this until S&P inclusion.
People disagree on the future value of TSLA, we place our bets and see who was right. I love this game! Some shorts still believe that Tesla is not and never will be profitable. Some longs believe that Tesla is and will be profitable. Imo it is wise to not place total confidence in your beliefs, I believe that Tesla very likely is profitable, would be very surprised if Tesla has managed to cook the books. But I could be wrong, I have been wrong before and will be wrong again. But I am happy that there is a big disagreement, that means that there is a chance to make money if you are right and I’d like to think that I am a long term winning player in the guessing game.
*For some periods in time the market has been seriously broken, see
Flash Boys