EFTA Document EFTA01393110

CHAPTER W INDEX OPTIONS ABOUT INDEXES As referred to in this booklet. an index is a measure of the prices of a group of securities* or other interests. Although indexes have been developed to cover a vari- ety of interests, such as stocks and other equity securi- ties, debt securities and foreign currencies, and even to measure the cost of living. indexes on equity securi- ties (which are called stock indexes) are among the most familiar, and they are the only indexes that under- lie opti