This is an excerpt from the 4-volume dictionary of ecomics, a reference book which aims to define the subject of ecomics today. 1300 subject entries in the complete work cover the broad themes of ecomic theory. This extract concentrates on finance. Over recent decades, the study of finance has demonstrated a growing unity between theory and practice. Subjects such as corporate finance and stock markets, once approached by business specialists in mainly descriptive terms are w a branch of applied ecomics that uses theory to understand the real workings of financial markets. The resulting insights, demonstrated in these essays, bridge the ecomics faculty and the business school.