legendary trader Steve Cohen of SAC capital spend all day trading and only got these returns

-1992 to 2005: 43.5% per year (before fees)

-1992 to 2012: 25% per year (after fees)

-1992 to 2013: around 25-30% per year (after fees)

and the firm had to pay a $1.8 billion fine for insider trading using expert networks inappropriately