Managing trading risks?
The article is right that there are no silver bullets. The problem with derivatives is that there are down side risks that are hard to estimate. So you don't have a way to determine your exact exposure. A mark to market will let you know your current value of the investment but it doesn't tell you how much you can lose on your derivative investment, only what you would have made/lost if you had sold your investment at the time you did the mark to market.
The interesting thing is that the "rogue" traders are making uncontrolled trades in derivatives. That is, trading in derivatives are supposed to be a hedge against an underlying trade/investment and there should be oversight by upper management/senior traders.
While this isn't directly an IT issue, the technology does exist to help catch exposure...