The stock market is generally more of a "rich people's feelings" graph - very few Americans relatively are invested in any meaningful way, most if they are do so through a 401k or similar. That said, what "the market" hates most is uncertainty - and there's quite a lot of reasons to be uncertain at the moment between tariff threats and mass layoffs (not to mention geopolitical tensions).
Importantly though (and this is just a personal opinion) I think many stocks on the market are way overvalued. Executives and investors have used every trick in the book to "make a line go up", which means they aren't really operating on any business foundation designed for longevity or to withstand swings in the market. There's bubbles lurking in a lot of sectors. I'd guess at least some of this downwards momentum will be a market correction for some of these issues.
As always though, it's the folks invested through pensions and 401ks that have the most to lose relatively. The big players have probably already taken out their cash and are just waiting to see what they can buy up in a crash.
I watched a comedian on YouTube make a great point: When DeepSeek was announced the markets lost a trillion dollars in value and almost no one noticed except like twelve people.
I agree with the sentiment but I work in IT and yearn for when we will get rid of Microsoft, Amazon, and the tech giants.
My mother won't buy anything American at the grocery store but uses Amazon and Facebook every day.
My coworkers won't buy American products but use Windows, Teams, and Office every day.
I may be using Linux, open source software, and avoid American tech when possible, but I still use Google and Gmail.
At some point we may want to (or should) also extend that boycott to software and tech services. Have our governments, institutions and people not dependent on American corporations. It can only be good for our sovereignty anyway.
I asked in another thread about the possibility and likelihood of a sort of "digital embargo" where the states would order American companies like steam to halt service.
Forget not being able to get oranges or having to eat frozen veggies part of the year, this is somewhere that I can't really change my buying habits and move on (my steam library can't leave steam in this example)
Big Tech always amplifies gyrations in the market. Hence, every single one of these stocks (except Microsoft, I just checked) is still beating the S&P 500 over 6 months, even with these drops. And Microsoft is still way up in the long term.
Look, I want meteors to hit them all, but huge swings are the norm for these now. Hotter stocks trade a lot like crypto these days.