Note that they made $100 million. I did not see a value at risk, gross notional or netted, presented.

TFA says billions bought and sold before fading out to ads.

I guess making 5% returns isn't such a big deal when you are playing with billions of other people's money.

If they had 100s of such trades, the management wouldn't look at it as rounding error. That's reductio ad absurdum that is.