(abbreviation S & P 500)
A group of 500 companies whose average daily share prices are used to calculate an index of the day’s security prices.
- One in four shares in the Standard & Poor's 500 index was at a 12-month low.
- It's a measure of risk, primarily the sensitivity of a company's stock price to an overall fluctuation in an index like the Standard & Poor's 500.
- The Standard & Poor's 500 - stock index has plunged 45% since its March 2000 high.
For editors and proofreaders
Syllabification: Stand·ard & Poor's 500
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