Peter Lynch deserves a place in the hall of fame with his average returns of 25+% per year during his 13 years tenure at Fidelity Magellan Fund. In one phrase his investment style can be summed as "buy what you know" Although it is very difficult to quantify his philosophy as a rule of thumb, however after reading his classic best selling book " One up on wall street" reader do get an insight into his stock selection method.