[redox99]

The spreads on most markets always seemed like a hint that polymarket transferred wealth from the impatient that don't really understand how it works, to those that play mostly as patient market makers with just an educated guess.

The problem is that volume is generally too low to make significant money.

[superfrank]

I'm not saying this as an argument for or against prediction markets, but that's essentially what the vig is at traditional sportsbooks.

Someone calculates what they think the odds of an outcome happening are and then they allow people to take positions on either side at worse odds than what they think the real odds are. As long as their prediction is correct, over time they make money. It's why putting $1 on a 50/50 bet on a sportsbook will usually only pay out around $1.91 instead of $2 if you win.

[Onavo]

Isn't that just a normal market maker?

[hammock]

Books pay handicappers as well to make the guesses so that cuts into the vig

[chmod775]

The only time I'd trade on that platform is when I have information others don't. I assume that is also true for those 1% farming suckers.