How big should expected value be before I bet?

Expected value (EV) is a crucial concept in betting and gambling. It represents the average amount of money you can expect to win or lose on a bet over the long term. To make informed betting decisions, it is essential to consider the size of the expected value before placing a bet. Determining an acceptable threshold for EV is subjective and depends on various factors, such as personal risk tolerance and betting strategy. However, it is generally recommended to only place bets when the expected value is positive. Let’s dive deeper into this topic and explore some frequently asked questions about it.

1. What exactly is the expected value?

Expected value is the predicted value of an outcome, calculated by multiplying the probability of an event occurring by the potential value gained or lost.

2. How do I calculate the expected value?

To calculate the expected value, multiply each possible outcome by its probability and sum them up. The resulting value represents the expected value.

3. Why is positive expected value important?

Positive expected value indicates that, on average, you can expect to win money over the long run. It suggests that the odds are in your favor and that the bet is potentially profitable.

4. Should I bet even if the expected value is small?

Betting with a small positive expected value can be a reasonable strategy for long-term profitability, especially if combined with a large sample size of bets.

5. How can I determine an acceptable EV threshold?

There is no definitive answer to this question since it depends on individual preferences and risk tolerance. However, many experienced bettors use a positive expected value of 5% or higher as a general guideline.

6. What other factors should I consider before betting?

Apart from expected value, consider factors such as the reliability of your information, the size of your bankroll, and the potential variance or risk associated with the bet.

7. Is it possible to find bets with significantly high expected values?

While finding bets with extremely high EV is rare, it is not impossible. However, be cautious and double-check your calculations and assumptions to avoid oversights or mistakes.

8. Can I solely rely on expected value for successful betting?

Relying solely on expected value is not enough for successful betting. Other factors, including discipline, sound bankroll management, and well-defined strategies, are vital for long-term profitability.

9. Should I avoid bets with negative expected values altogether?

Bets with negative expected values are typically unfavorable, as they suggest you will lose money over time. However, some professional bettors might still consider them if they believe their own prediction to be more accurate than the market’s implied probabilities.

10. Is expected value applicable only to sports betting?

No, expected value is applicable to various forms of betting and gambling, including casino games, poker, and other games of chance.

11. Does expected value guarantee immediate profits?

Expected value is a long-term concept, and individual results can still vary significantly in the short run due to luck and variance. It does not guarantee immediate profits but suggests profitability over a large sample size of bets.

12. How does expected value help me make rational betting decisions?

Expected value allows you to objectively assess whether a particular bet is worth making or not. By considering the potential value and the likelihoods associated with different outcomes, you can make more informed and rational betting decisions.

How big should expected value be before I bet?
While there is no definitive answer, it is generally recommended to place bets only when the expected value is positive. This positive expected value suggests that, on average, you can expect to win money over the long term and potentially achieve profitability. However, remember that expected value is just one component of successful betting, and other factors should be taken into account as well.

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