Take 512 investment funds, in one year half of them make a profit, half of them will make losses. Drop the ones that had losses, the next year half will make pr

Take 512 investment funds, in one year half of them make a profit, half of them will make losses. Drop the ones that had losses, the next year half will make profits, the other half will suffer losses. Repeat until one fund is left: "Invest in us - we are market experts who had no losses for the past 9 consecutive years!"