which best describes what a market index does?\nan index measures market performance.\nan index measures…

which best describes what a market index does?\nan index measures market performance.\nan index measures economic trends.\nan index measures growth.\nan index measures the performance of a single stock.
Answer
Brief Explanations:
A market index is a statistical measure that represents the performance of a group of stocks or other securities, thus it measures market performance. Economic trends are broader and not the main focus of a market - index. Growth is a part of market performance but not as comprehensive. A market index does not measure the performance of a single stock.
Answer:
An index measures market performance.