@DaveT (also "
Dave Lee on Investing" on Youtube) puzzled this out in Feb, 2020: ARK Invest doesn't make their money of their trades (that goes to their ETF clients), ARK makes their money is through management fees.
By attracting new money into their fund with splashy trades, ARK can make more fees. Their strategy seems to be working for them, although nobody ever talks about how the individual investor would have done had they just put the same amount into TSLA and held, vs owning an ARK Invest ETF.
Here's the video:
Cheers!