A correct model does not save someone who bets on feeling. Most losses do not come from a bad forecast. They come from decisions made after a loss or after a win.
The traps we see most
- Gambler's fallacy: you believe a win is "due" after losses. Every match is independent.
- Chasing losses: you raise the stake to win back what you lost. A bad day becomes a bad month.
- Overconfidence: a winning run makes you think you see more than the market.
- Confirmation: you only read what supports the pick you already made.
- Emotional betting: you back your own team or bet against one that annoys you.
- Accumulators for the "big win": hope of a large price hides a very small probability.
What the research says
Researchers at the Columbia Center for Economic Research describe how loss aversion, overconfidence and probability misperception make bettors predictable. A UCL doctoral thesis analysed 565,915 bets from 776 online gamblers and found that after wins players chose safer odds and after losses riskier ones, behaviour that expects their luck to persist.
Sources: Columbia CER, UCL thesis.
How to defend yourself
- Set the stake before you see the result and do not change it during the day.
- Keep a log: date, odds, stake, why you played it. You read it calmly later.
- Set a daily or weekly loss limit and stop when you reach it.
- Wait 24 hours before betting after a big loss or a big win.
Example
Nick loses three 70% tips on a Saturday and doubles his stake on the next one "to win it back". The chance of the next tip is still 70%. The only thing that changed is that he risks twice as much.
If betting starts to press on you, read the lesson on responsible gambling.