the premise here is that market makers and arbitrageurs are crucial for efficiently allocating capital. enabling sellers to sell to the highest bidder and buyers to buy from the cheapest vendor means less capital wasted(?)
in my experience Jane Street make no attempt to defend the financial system; such societal benefits are obvious or implicit.
whether you (or they!) really buy that is irrelevant
in my experience Jane Street make no attempt to defend the financial system; such societal benefits are obvious or implicit.
whether you (or they!) really buy that is irrelevant