Comment by bitmasher9

I suspect the number of picks you would need is surprisingly small to reach high parity with the S&P.

If you don’t pick the right grocery company, you have a shot at picking the right telecommunications company. You pick fewer winners, but you’re also picking fewer losers.

The real reason to do this is because you want to avoid specific companies that are inside the index. You would only do this if you felt confident in your ability to avoid investing a lot of capital in losers. Even if you’re great at avoiding the telecommunications loser, you might be worse than average at avoiding the loser in other sectors.