Previously, the commission rate paid by bankroll investors was calculated by converting the bankroll to special drawing rights (XDR) using the average exchange rate of the past 360 days, then dividing the result by 55,000,000 XDR. Going forwards, the average exchange rate of the past 180 days will be used instead, allowing the commission rate and by extension the bankroll to react to changes in Bitcoin's price faster. The immediate effect is a reduction of the commission rate paid by investors from approximately 46% to 36%.