The Truth: Variance in Poker, Do You Really Understand It?

What is Variance?

In poker, variance refers to the fluctuation between short-term results and long-term expected value. Even if you make correct decisions (+EV), you can still lose many pots in a row in the short term – that's variance in action.

Key points:

• Variance is a natural consequence of randomness, not simply "bad luck."
• In the long run, the expected value of correct decisions will materialize, but short-term swings can be extreme.

Common Misunderstandings

1. "Losing money means high variance": Losing money can result from skill gaps or a downswing – not all losses are variance.
2. "A winning streak means I'm unbeatable": Short-term winnings may include a large luck component; don't overestimate your skill.
3. "I can control variance": You cannot eliminate variance, but you can reduce its magnitude through strategic adjustments (e.g., managing pots more conservatively).

Variance and Bankroll Management

Understanding variance is essential for establishing sound bankroll rules. Example:

• If a cash game buy-in is 100 big blinds, it is recommended to have at least 30-50 buy-ins to weather downswings.
• Tournament players typically need 100+ buy-ins because variance is greater.

How to Develop the Right Mindset

1. Accept that short-term results are unrelated to decisions: Focus on decision quality, not outcomes.
2. Record and analyze: Use poker tracking software to log hands and distinguish between luck and mistakes.
3. Set long-term goals: Evaluate profitability on a monthly or quarterly basis, not per single session.

Summary

No one can fully "understand" variance because it is inherently random. However, through scientific understanding and disciplined bankroll management, you can reduce the emotional impact of variance and concentrate on improving your skills. Remember: Long-term profit comes from accumulating +EV decisions, not short-term wins or losses.