Meaning of the word "stock index" in English

What does "stock index" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

stock index

US /ˈstɑːk ˌɪn.deks/
UK /ˈstɑːk ˌɪn.deks/
"stock index" picture

Noun

1.

a statistical measure of the changes in a stock market, based on the average performance of a selected group of stocks

Example:
The Dow Jones Industrial Average is a well-known stock index.
Investors often track the performance of a stock index to gauge market trends.
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