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You hit on so many great points in this post. Another important function trading firms (especially market makers like Jane Street) is to serve as ready-and-willing counterparties for the pension funds, endowments, and retirement funds of the world. All of those firefighters, police officers, and teachers can't get their monthly check unless the pension funds converts part of their investment into cash, and the amount traded gets so large you need well-funded financial participants who will pay the pension fund a large lump of cash and assume the risk of unwinding the position. The same thing goes for portfolio rebalances. Some smart and prudent retirement fund has run their risk model and decided that their sector exposures are off by like a few percent. They've got 2% too much financials, 2% too little tech, they want to move 1% from consumer staples to consumer discretionary, etc. We're talking about billions of dollars being moved right here! They want to use the money from the assets they sold to purchase the assets they bought, but they want the transaction to happen all at once... not in two parts. Again, this is where the quant funds and market makers of the world come in. It's easy to think that finance is all fat cats, hedge funds and multibillionaires, but anybody with a retirement plan, a pension, ETF holdings, or mutual fund holdings, benefits from the work these quant funds do. |
So yes, it's a leap of abstraction for most people to grasp that 'market making' etc. is an important function, and that there's legit value created.
... but the amount of surplus capture is gigantic and that's the problem.
Fouquet became Louis IX 'CFO' and somehow at the same time amassed massive wealth possibly illegitimately and so he lost his head very quickly.
It's always the people closest to the piles of Gold that end up with all of the Gold. There are a million ways they justify it, and in free markets where information and relations are 'the power', well, they have it all.
Usually it's 'generally very talented' people involved, of that I have no doubt, but that again doesn't justify necessarily the surplus capture.