I think you're still doing L1/L2 thinking.
The way I understand L3, there's no such thing as "fundamental value". There's only market value, that's determined by what people think the market value is. The extent to which it's correlated with real-world performance of a company is limited to how likely other people are to take that performance into account. Ordinarily, enough investors look at the state of the company to give rise to a correlation (if only because otherwise there's nothing external to look at!). Meme stocks are kind of extreme here, in that everyone knows that everyone else knows the stock is being traded on its market value. But that feels to me like a difference of a degree, not of a kind.
And at this point I ask myself, how any of that is even useful to the society? Could we decouple the parts that let companies loan money and be accountable to the shareholders, separate them from the part where investors just play their spreadsheet MMOFPS? Or is the former always inherently going to turn into the latter, as people will always game it?
As for the usefulness question: providing liquidity is useful. If an investor considers investing in some project, it helps his decision making if they can be reasonably sure that they will be able to sell their shares later on.
And even if it wasn't useful, why would you care what other people do with their money?
The irrationality is more on the upside: tech stocks whose fundamentals make little sense you suspect will go up in value in the short term anyway because of FOMO. A lot of people have made fortunes on those kind of bets, and there are definitely people day trading WSB hyped stocks who don't forget to sell.
You also have some legal rights as a shareholder. I don't know about the US, but for example in my country there is a LEGAL requirement for companies to maximize shareholder value. Few people seem to know when they blame capitalist greed, when really it is a government law. So you can sue the company if you think they mismanage their assets.
Of course there are ways for companies to rip off shareholders. I think there is an old Philip Greenspun article about it, iirc he mentions buying expensive furniture and artwork for the offices.
I suppose it is part of the due dilligence before investing in a company, to check how they spend their money.
Pensions are terrible (at least based on performance so far). Not only do they provide worse returns, many are incentivized to lock you into a specific company for many years.
An friend of mine retired in 2013 and had pensions from the first 3/4 of his career and a 401k from the last 1/4. The 401k grew so much it paid out more than all of the pensions together when annuitized (even with garbage interest rates).
I have a pension and if I maxed out a 401k it would grow "bigger" but that means I'd be saving more than the pension plan payments that come from my salary require me to save.
- there was no individual selection in pension investment. They are risk averse so you end up with bullshit total market stuff that gets tepid gains compared to US stocks.
- it’s impacted by the performance of the company. Many pensions invested part of the money into their own stock/industry so a downturn would impact both job prospects and the pension performance
Pensions are “I know better than thee” bullshit run by a company with some kind of elected moron deciding what happens with your retirement. No thanks
But as a stock holder even of a public company, your shares can get diluted to smithereens when they issue new shares to raise money.
For a laugh check out the chart of Helios and Matheson, the MoviePass company that had a fly by night stock spotlight experience a couple of years ago. It's so diluted, the historical price looks like the stock was worth bazillions in the past chart numbers.
There are limits - I would assume the SEC has the ability to approve or deny new issuance of shares. If you have 1 million outstanding shares, they would probably frown upon a filing to issue 1 billion more shares.
I think control theory works better at describing these factors, as L1-L2-L3 suggest some derivative relations that its's not really there.
you have your set point, which is the hard company value. you have n proportional forces, each proportional to the distance from the company current value and that of every put and call on the market. you have a damping effect in the form of HFT, and you have an integrative term, which acts weird because it's applied inversely proportional to the short positions, and it's the lending cost on the short positions.
(I didn't want to suggest some derivative relation - just refer to the "perspectives" mentioned in the topmost comment.)