[tptacek]

Liquidity reduces the cost of trading for everyone, which is something you can just empirically verify. What do we care what someone's motivation for doing it is? Presumably everyone's motivation in finance is to make money.

[mverwijs]

> Liquidity reduces the cost of trading for everyone,

Yes. And I do not see this as a boon. It reduces the cost of trading for traders at the expense of _everything_else_.

Eg: search for 'whack bully oil prices'.