Peter Lynch managed the investments at the Fidelity Magellan Fund, a mutual fund that consistently and effectively outperformed the market throughout the 1970s and 1980s. Although he draws on his personal experience as a fund manager in One Up on Wall Street: How to Use What You Already Know to Make Money in the Market he emphasizes the qualities of the individual thinker over those of the professional strategist. At the core of the book is his assertion that everyday observations about the changing patterns in the economy and consumer interests, combined with the flexibility and speed of the individual investor, gives them an edge that large fund managers do not always have. “If you invest like an institution,” Lynch warns, then “you're doomed to perform like one, which in most cases isn't very well. Nor do you have to force yourself to think like an amateur if you already are one. If you’re a surfer, a trucker, a high-school drop-out, or an eccentric retiree then you’ve got an edge already.”

Value Investing by buying below present fundamental value securities isn't the only way things can be done, Growth Investing is just as justified as Value Investing strategy-wise.