Do economic factors influence exchange rates? Or does market sentiment play a bigger role? Are short-run exchange rates predictable? Greg Hopper reviews exchange-rate economics, focusing on what is predictable and what isn't. He also examines the practical implications of exchange-rate theories...

Many different types of institutions hold portfolios of assets, and prudent financial management dictates that these firms be alert to any risks these assets may carry. How can these institutions judge the likelihood and magnitude of potential losses on their portfolios? A new methodology called...