You fail to grasp the size of the equities market, as well as tangential trading opportunities. Also options market making against retail is absurdly profitable

You fail to grasp the size of the equities market, as well as tangential trading opportunities. Also options market making against retail is absurdly profitable. There’s a reason Citadel is paying tens of millions of the privilege of executing these trades. Source: former head of quant trading for multi billion dollar hedge fund