View source for S&P 500

The '''S&P 500'''<ref>https://www.marketwatch.com/investing/index/spx</ref><ref>https://www.spglobal.com/spdji/en/indices/equity/sp-500/#overview</ref><ref>https://finance.yahoo.com/quote/%5EGSPC/</ref>, an abbreviation for Standard & Poor's 500, is a stock index comprised of 500 large companies traded on United States stock markets. It is not necessarily the 500 largest companies, as there is a selection process that considers the track record and future prospects of a company.  Often the S&P 500 is cited as a measure of how the [[stock market]] is doing.

Unlike the [[Dow Jones Industrial Average]], the S&P500 is weighted by [[market capitalization]], such that the larger "cap" stocks have a greater influence over the index than the smaller cap stocks do.

A notable exclusion from the S&P 500 was [[Tesla Motors]] (TSLA) on Sept. 4, 2020 (after the markets closed), probably because TSLA was considered to be so vastly overpriced that a decline in its price could have weighted down the entire S&P 500.  TSLA was subsequently accepted into the S&P 500 index.

As of March 2022, the weighting in the SPY [[ETF]] was:<ref>https://www.investopedia.com/articles/investing/122215/spy-spdr-sp-500-trust-etf.asp</ref>

*Apple Inc. (AAPL)	7.07%
*Microsoft Corp. (MSFT)	6.04%
*Amazon.com Inc. (AMZN)	3.73%
*Tesla Inc. (TSLA)	2.36%
*Alphabet Inc. — Class A (GOOGL) 	2.18%
*Alphabet Inc. — Class C (GOOG) 	2.03%
*[[NVIDIA]] Corp. (NVDA)	1.78%
*Berkshire Hathaway Inc. — Class B (BRK.B)	1.69%
*Meta Platforms Inc. (Facebook) — Class A (FB)	1.34%
*UnitedHealth Group Inc. (UNH)	1.25%
==References==
[[category:finance]]