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Active investors still rule the market by a wide margin. Some would like to assume they’re just throwing darts in the dark, but in reality active investors are only getting smarter and better over time as more competition enters and technology progresses. As Michael Mauboussin has postulated in his work, the paradox of skill means that as more sophisticated investors have entered the marketplace the level of outperformance will continue to narrower over time. And as skill improves, luck becomes a much bigger factor in separating the winners from the losers.

Source: What Happens When There Are Fewer Suckers at the Poker Table? – A Wealth of Common SenseA Wealth of Common Sense