Interesting idea, even average would probably already work, it would give high performers some impact but not as much as now. But it kinda misses what the S&P

Interesting idea, even average would probably already work, it would give high performers some impact but not as much as now. But it kinda misses what the S&P is in my pov. An index tracking how the value of those companies developed over the years measures by what you would have now if you would have invested in each of them