Market risk is not physics. It just acts like it. Until it doesn’t.
One of the early quants at former Wall Street heavyweight Salomon Brothers, Dr Lance Smith has a rich mathematical background, but believes there is much more to risk management than the mathematical models.
“A tsunami strikes Japan, or a Brexit strikes the UK,” says Smith. “Things happen that are not in the tea leaves of historical data. On the other hand, physics is repeatable. Given the same starting point and conditions, you can predict the outcome with well-defined and known probabilities.”
“Not so with the markets,” he adds. “You don’t get do overs. Traders make bets that are tilted in their favor, and the key is to make sure that you can survive the negative surprises and reap the benefits of making such bets.”
ED&F Man Capital Markets replaces legacy systems with TS Imagine’s fully-hosted, SaaS solution for high-volume, real-time analytics on cross-asset exchange and OTC trading.
When analysing performance, measuring a portfolio’s actual return answers the “what” and “when” questions –– it tells us what return the portfolio delivered over a specified period of time. While that information is obviously important, the goal of a performance attribution analysis is to go beyond “what” and “when” to explain “how” and “why”.
Managing the risks inherent in their positions, including holding sufficient margin, is absolutely essential for prime brokers. The key question is whether or not they are measuring risks and managing margin effectively and proactively.