When odds shorten, it typically means that more people are betting on a particular outcome, causing bookmakers to adjust the odds to reflect the increased probability of that event occurring. This adjustment reduces the possible winnings for bettors if the favored outcome happens. It can also be a reflection of new information or developments that make the outcome more likely.
Shortening Odds Example
For example, in a horse race, if a horse’s odds shorten from 5/1 to 3/1, it indicates that the horse is now considered more likely to win, reducing the potential payout for those placing bets on it.