The Fidelity Magellan Fund () is a U.S.-domiciled mutual fund from the Fidelity family of funds. It is perhaps the world's best-known actively managed mutual fund, known particularly for its record-setting growth under the management of Peter Lynch from 1977 to 1990. On January 14, 2008, Fidelity announced that the fund would open to new investors for the first time in over a decade. By the end of the 20th century the Magellan Fund had well over $100 billion in assets under management. For quite some time it was the single largest mutual fund in the world until April 2000, when it was displaced by Vanguard's S&P 500 index fund. Overview Fidelity earns its income, like most companies managing mutual funds, from fees charged on its funds' assets under management (AUM). From the fund's inception in 1963 through 1977 Magellan grew to $20 million in AUM. The $20 million fund Peter Lynch inherited grew to $14 billion in AUM during his tenure. During Morris Smith's tenure, AUM grew from $14 billion to $20 billion. During Jeffrey Vinik's it grew to $50 billion. Bob Stansky certainly experienced the most volatility with respect to AUM during his time with Magellan. In July 1996, his first month as manager, more than $3.5 billion was taken out of the fund as investors redeemed their shares and the portfolio experienced setbacks. Stansky quickly moved out of bonds and into stocks to stop the assets from flowing out. On September 30, 1997, Fidelity decided to close the Magellan Fund to new investors. They believed that the size of the fund was beginning to make it difficult to beat the market. The largest growth of the fund occurred under Lynch's management with a growth in assets invested in the fund from $18 million to $14 billion during his tenure. However, the best annual return was 116.08% in 1965, and the best three year record was 68.32% annualized between 1965 and 1967, as the fund was operating with limited assets and oversight. Management by Peter Lynch, 1977-1990 Peter Lynch took the reins in May 1977 and remained the manager of Magellan for the next thirteen years. Between 1977 and 1990 the fund averaged over a 29% annual return, making Magellan the best performing mutual fund in the world. Lynch created the investment process commonly referred to as “Buy What You Know." Lynch proposed that the person on the