That is typically due to low fees though, and not something that is inherently due to it being an index. Hint: The people constructing the index are doing as m

That is typically due to low fees though, and not something that is inherently due to it being an index. Hint: The people constructing the index are doing as much of an active choice of stocks as the active traders are. Nothing stops a trader from selecting stocks following the same strategies as how an index is selected.