Computational finance [Guest Editor´s Introduction]

In this issue are articles that demonstrate various computational-finance business applications and discussion of current research directions and opportunities. It is hoped this special issue illustrates challenges for coinputational scientists in the financial markets. Many opportunities exist for rescarch, but practical applications in the financial industry will not wait for the completion of research programs. As this year??s appearance of online trading demonstrates, the markets develop at their own pace. Business users will continue to demand accurate modeling, rapid implementation, and the ability to deliver without delay.