>There are a few traders in history that beat the market in a statistically significant way for basically their entire career. Given the vast number of market

>There are a few traders in history that beat the market in a statistically significant way for basically their entire career. Given the vast number of market players, what counts as "statistically significant"? A probability of seeing results at least as good as theirs by chance of 1 in 20? 1 in 100? 1 in 1000? 1 in 10,000?