2018 P/L year to date +40%

Quite possibly, my issue is out of OP's scalability, which I do NOT understand yet.

Sorry for that if so.

Liquidity is limited. You will be stuck and you cannot make a 80% return at a certain point due to lack of liquidity. You will then have to retain your position size whilst your account size is expanding, hence, lowering the return in terms of percentage relative to your account size. The return percentage will diminish as your account grows larger.
 
Firstly, that's more like a buy and hold... which means, when you get bigger and bigger you will not outperform SP500 (by much)... as you can clearly see in the data... his returns are moving towards SP500.

This is BRK's outperformance to SP500:

View attachment 185053

Since it's more buy hold, so if you trade very actively you can't swing too large amounts. So you have to adapt from a multiple times a day algorithm to a more conservative buy hold... and you would have to put more eggs in the basket, therefore you would be diversifying. Which should normally be a good thing, but that also means you will approach a more market conform return... hence why his returns are sliding towards 0 outperform.

Secondly, he started out with a lot less... so he had no issues with scalability at that time, or any time before he got bigger. Start of BRK was with 2.5mln? Still decent amount... But again, this contributes to him approaching zero in outperformance.

Buffett is also implicitly between 1.5 to 2 times levered on uncorrelated debt with negative interest rates (insurance float). Some academics magically realized that if you adjust SPX returns for that leverage, Buffett's late alpha disappears.
 
Huh? This was posted well after the close, which was at $11.99. SVXY traded below "$12.26" all afternoon.

Date Apr 23, 2018
Open 12.29
High 12.45
Low 12.17
Close 12.30

Kids these days
 
At the point Vol can’t make 80% anymore, it’ll be like so what. He’d be swinging so big 10% a year would be the kind of money others still dream of.
 
10% a year would be the kind of money others still dream of.

Agreed. That is why most broker in most countries lend money to traders with interest of 8% to 12%.

My guess is good and profitable traders cannot outperform the above annual 10% historically, which many brokers learned long time(400 years after Netherland).
 
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