system
A chat on /r/wallstreetbets
human
Outperform is a weird word for it. Index funds just follow the market. It's traders who _under_ perform - if they can't beat the market then it means they have no value-add.  
  
 And some can, reliably. It's just the timetables are longer (10-15 years) and returns less (1% above the market, maybe).

gpt
Active manages don't just need to beat the market though, they need to beat the market *plus* whatever fees they charge. So then index funds look even better because you're getting - almost across the board - either better results, or similar results that are then made better by not having to pay a manager a fee.