IMHO precisely why we keep grinding higher. Sentiment still too bearish but starting to shift finally with the bigs saying stuff like "bottom is in / BTFD / bad earnings priced in".
The markets going crashing up can end up being just as bad as the markets crashing down. There was a short time where being bearish bias was paying off, but once it was clear FED was supporting levels as people were discussing on here it's been a lot more efficient to be long. Bottom line is its best to just focus on the trade setups and edge you know and take them as they come.
It's a weird game but obviously a lot of people sold relatively low on the markets, so if they buy up all the selling supply and push markets higher, now people will have fear of missing out / forced to buy in higher if they want back in which at that point they can unload into some of the liquidity. Than rinse and repeat at lower levels if need be. That's how I would play it, if I wanted to support markets. Seems pretty effective so far, despite being hard to wrap my brain fully around it, but I don't exactly know the level of the sustainability or long term effects of that. Anyways the effectiveness and quality of my trading goes way down when I think about this stuff and try to apply it to my trading, so I will stop here. It's just sometimes gets the better of me and I like to hear others thoughts.