Biotech Ideas

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Peter Lynch did ok

Peter Lynch managed a diverse portfolio for the Magellan Fund, owning a peak of around 1,400 stocks in 1989, though the number fluctuated significantly, from about 60 when he started to over 1,000 when he left in 1990. He believed in owning as many interesting prospects as an investor could find, but also warned against over-diversification.

Lynch's Portfolio at the Magellan Fund

Early Years: When Lynch took over the Magellan Fund in 1977, it had roughly 60 stocks.

Growth of the Portfolio: He dramatically expanded the portfolio, buying hundreds of stocks he believed were undervalued and had growth potential, even if it meant owning multiple stocks from the same industry.

Peak Holdings: In 1989, the Magellan Fund held an extraordinary number of stocks, reaching approximately 1,400.

Final Holdings: By the time he resigned in 1990, the fund held more than 1,000 individual stocks.

Lynch's Philosophy on Diversification

Conviction in Many Stocks: Lynch's strategy was to find many "exciting prospects" and own them, making his portfolio very diversified.

Avoiding Over-Diversification: Despite owning so many stocks, he was still cautious about over-diversification, which suggests a balance between having many holdings and not owning so many that it becomes unmanageable or dilutes potential returns.