SPDR S&P 500 ETF Trust
An exchange-traded fund that lets everyday investors buy a slice of the S&P 500, the index of the 500 largest U.S. companies, in a single trade under the ticker SPY. Launched in 1993 by State Street Global Advisors and the American Stock Exchange, it was the first ETF ever listed in the United States. Its name, SPDR, stands for Standard & Poor's Depositary Receipts, and because that acronym is hard to say, traders nicknamed it "the spider" — a nickname State Street later embraced with a spider in its logo.
Units of beneficial interest in a unit investment trust tracking the S&P 500 Index
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.