The SPDR S&P 500 ETF trust is an exchange-traded fund which trades on the NYSE Arca under the symbol SPY (NYSE Arca: SPY). SPDR is an acronym for the Standard & Poor's Depositary Receipts, the former name of the ETF. It is designed to track the S&P 500 stock market index. This fund is the largest and oldest ETF in the USA. SPDR is a trademark of Standard and Poor's Financial Services LLC,^[1] a subsidiary of S&P Global. The ETF's CUSIP is 78462F103^[2] and its ISIN is US78462F1030.^[3] The trustee of the SPDR S&P 500 ETF Trust is State Street Bank and Trust Company. The fund has a net expense ratio of 0.0945%.^[2]

The Standard & Poor's Depositary Receipts were launched by Boston asset manager State Street Global Advisors (SSgA) on January 22, 1993, as the first exchange-traded fund in the United States (preceded by the short-lived Index Participation Shares that launched in 1989); and are part of the SPDRs ETF chain.^[4][5][6] Designed and developed by American Stock Exchange executives Nathan Most and Steven Bloom,^[7][8] the fund first traded on that market, but has since been listed elsewhere, including the New York Stock Exchange.

In February 2024, SPY became the first ETF in history to reach $500 billion in assets under management.^[9]

Other ETFs that are based on the S&P 500 index include:

• Vanguard S&P 500 ETF (NYSE Arca: VOO)^[10]
• iShares S&P 500 Index (NYSE Arca: IVV)^[11]

Returns of SPY by fiscal year per SEC EDGAR filings. The trust ends its fiscal year on September 30. The 5-Year and 10-Year Average (Avg) Annual Return results in the table below include reinvestment of distributions (typically dividends) from the trust.

• List of exchange-traded funds
• Collective investment scheme