It's been pretty accurate lately
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Options trading requires a steady hand
The SPDR S&P 500 trust is an exchange-traded fund which trades on the NYSE Arca under the symbol. 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. $SPY is the first ETF ever made and is also the largest ETF in the known universe. NYSEARCA: SPY