Quote from tomcole:
Good points all.
The limiting factor in institution size trading is the mindset of these folks - they sit behind gleaming desks, make oodles of salary and have their egos massaged endlessly by brokers. Of course they think they're brilliant. And given all this, their senior managers portray them as market mavens who are beyond brilliant. Heres the reality-
1. Arb - Anyone can find a simple arb, push a gazillion dollars into it, or until it goes away, claim it as an arb, which gets treated very differently accounting-wise than outrights and suddenly your return on capital becomes infinite. Some arbs/swaps allow you to take the net profit immediately, meaning you dont accrue the earnings, you get to swallow it on Day 1 - neato accoutning trick.
2. Outrights - Seeing customer flows, order books etc, gives you an immense benefit the average joe doesnt have. Being able to swallow huge margin calls just means you have large capital/credit lines. It doesnt mean you're a good trader.
3. Swinging big lines, mean you can push markets into stops or chart points, something most traders simply cant do with their 20/30 lot trades. So, its not really genius trading, its simply a big upstairs desk trading like big locals used to.
The P&L and reported numbers have limited meanings - its a function of accounting, not actual margin/cash flows.
In the end, if these traders were all that, wouldnt their P&Ls be huge? Having for example a capital commitment of $10 Billion, means you squeeze $1MM out per basis point. Now, remember the futures multiplier here, so the amount squeezed out should be way greater. A normal trader with say, $1MM in capital cant make a living with 1 basis point trades.
And the sweetest part of all this, is that these banks were originally meant to be financial internediaries, getting deposits and making loans - not dedicating, what is in fact, FDIC-insured money, to futures speculation.