"When it comes to investing, it's a losing proposition to try and be anything better than average.
If there's no point in trying to beat the market through 'active' investing - using mutual funds that managers run, selecting what they hope are market-beating investments - what is the best way to invest? Through "passive" investing, which accepts average market returns (this means index funds, which track market benchmarks)"
- Forbes
The idea of "passive indexing" sounds harmless enough - buy an "index" and be an "average" investor.
However, it isn't as simple as