Feel free to post a screen-shot of your trading this morning and I will refrain from calling you out as a "prop-poster" that doesn't TRADE at all. Your move.
Actually, how about a simple illustration of how fallacious the author's logic is? Let's use a simple derivative, a short-term interest rate (STIR) future, e.g. eurodollar. Currently, the Sep9 Eurodollar contract open interest stands at arnd 1mn. A single Eurodollar contract notional value is $1mn, which, basically, suggests that the mkt's total notional exposure is arnd $1trn, which is rather large. However, the risk of one contract is only $25/bp. If you do the arithmetic, you'll have to conclude that the author's 1% of notional at risk assumption suggests that they think a move of 400bps in the front Eurodollar contract is "conservative". It's just crap reporting, is all...