Common Prediction Market Mistakes Beginners Make
The single biggest beginner mistake in prediction markets is buying on opinion instead of price. Believing an event is likely is not enough — you have to decide whether the market price is too high or too low.
Opinion is not an edge
If you think an event is 80% likely and the market already prices it at 82¢, there is no value — you would be paying more than your own estimate. The skill is finding the gap between your probability and the market’s, not just predicting winners.
Buying Yes at 90¢ feels “safe,” but your upside is only 10¢ before fees while your downside is the full 90¢. One surprise and a string of those safe-looking trades wipes out months of small wins.
The usual traps
- Ignoring fees and bid-ask spreads
- Trading illiquid markets you can’t exit cleanly
- Misreading the settlement rules and source
- Overreacting to social media and hype
- Holding too many correlated positions at once
- Trading markets with vague or ambiguous wording
A habit that fixes most of them
Before every trade, write down four things: your expected probability, your entry price, your exit plan, and your maximum loss. If you can’t explain exactly how a contract settles, skip it. For the bigger picture, see can you make money on prediction markets?