alt Hacker News> I'm trying to understand what the criticism is here, because the example seems to support the point that these are meant to be a way of learning the future, not oppose it.
Indeed. Insider trading is a feature of prediction markets, not a bug. There are two kinds of people who participate in prediction markets:
1. People who have insider information, or at least more sophisticated predictive capability than your average person.
2. Gamblers.
In effect, prediction markets are a way to move wealth from the second group to the first. If you understand that and still want to participate, cool. It's your money, and you're allowed to gamble it away if you find that entertaining.
At any rate, given the relatively small-potatoes level of bets going on at Polymarket and Kalshi, the article author's breathless anxiety about this is a bit overblown.
Replies
>1. People who have insider information,
I mean, most stock trading prevents insider trading, unless of course you're a in congress.
Seemingly regulators consider this a bug in every other market type, but suddenly this gambling market allows it?
> breathless anxiety about this
All fun and games until people start dying from it.
Kalshi and Polymarket have a billion dollar of open interest between them (though velocity here matters too and volume is not very useful). The important thing is they are growing fast. Which means it might become big-potatoes very soon.
> 1. People who have insider information, or at least more sophisticated predictive capability than your average person.
This bucket as you've defined it is too broad.
There are a few different kinds of non-gambler participants in prediction markets:
1. People with "insider information" as we think of it - they "know" the answer to the market because they are "involved" somehow.
2. People who aim to do superior analysis of publicly available information to produce an edge. For example, an AI firm with better hurricane prediction modeling may try to monetize that by betting on whether or not a hurricane will impact an area.
2b. People who do the work to create new information. For example, the Trump 2024 election market on polymarket famously had better odds for Trump than polling. It turned out that a mega whale was bidding Trump up because he had paid for his own private polling in battleground states and that gave him confidence Trump was going to win.
In short, it's mostly incorrect to suggest that prediction market participants are either illegitimate insiders or gamblers; there is a third class of actors that are a very important cohort: those who do the work to create better predictions and monetize their work by betting in the markets. This third cohort of professional predictors is the most important in long-term prediction market growth.