> They make a ridiculous amount of money doing so.
I suppose it depends on how you define ridiculous, but HFTs actually make a surprisingly small amount of money these days. Probably single digit billions across the entire industry (https://quant.stackexchange.com/questions/34856/how-much-pro...), though 2020 was an exceptional year for many firms.
> Shouldn't the exchanges have offered the best price, and provided liquidity, in the first place?
Either your wording is a little funny, or this question indicates great ignorance about how trading works. Exchanges do not provide liquidity, market makers do. In 2021, "HFT" ~= "market maker".
I suppose it depends on how you define ridiculous, but HFTs actually make a surprisingly small amount of money these days. Probably single digit billions across the entire industry (https://quant.stackexchange.com/questions/34856/how-much-pro...), though 2020 was an exceptional year for many firms.
> Shouldn't the exchanges have offered the best price, and provided liquidity, in the first place?
Either your wording is a little funny, or this question indicates great ignorance about how trading works. Exchanges do not provide liquidity, market makers do. In 2021, "HFT" ~= "market maker".