[exHFguy1]

Agree 100% with this. 13Fs are not indicative of most HFs actual bets. Especially if they are running strategies where a bet consists of a bundle of securities (Eg convert arbitrage).

Also, Given delay in reporting, you’d just be getting in after they get in and likely they get out before you do. So the aggregate impact costs from this strategy becomes their alpha. Hence why some of these LS guys always talk up their positions.

[AznHisoka]

Agree with the second. Making money in stocks is not just what to invest in, but when.

If you bought FB in the beginning of July just after a hedge fund reported it (but they actually bought in April and sold in July) that would have been bad for you.