Peter Lynch is regarded as one of the world's most successful and well-known investors. Lynch is the legendary former manager of the Magellan Fund at Fidelity Investments, a large financial agency. At the age of 33, he took over the fund and ran it for 13 years. His accomplishment allowed him to retire at the age of 46 in 1990. Lynch's investment technique has been regarded as adaptable to time's economic circumstances, but he constantly highlighted the importance of knowing what you own.