What is closing line value (CLV)?
Closing line value, or CLV, measures how the odds you took compare with the final odds offered just before the event starts, with better-than-closing prices suggesting you found value.
The closing line is the last price before a match starts. By then the market has soaked up team news, injuries and all the big money, so it’s the best public estimate of the true chances. If you regularly get better odds than that final price, you’re probably doing something right, even when individual bets lose.
That’s why serious bettors care more about CLV than about last week’s results. Results are noisy. Beating the close is a steadier signal.
Example
On Wednesday you back a team at 2.10. By kick-off on Saturday the same bet is 1.95.
- CLV = (2.10 ÷ 1.95) − 1 = +7.7%
You got a price 7.7% better than the market’s final view. Flip it around: if you’d taken 1.95 and it closed at 2.10, your CLV would be (1.95 ÷ 2.10) − 1 = −7.1%. You overpaid.
One bet proves nothing. Three hundred or more bets with positive average CLV is strong evidence of skill. The same number with negative CLV and a profit is more likely luck that will run out.
Where you’ll see it
- In betting forums and podcasts, especially US ones, where “beating the close” is the standard brag.
- In bet-tracking spreadsheets and apps, as a column next to profit.
- When judging tipsters. A tipster whose advised odds vanish before anyone can take them has no CLV to offer you. More on that in how to judge a tipster.
CLV works best in big, liquid markets, like top football leagues and major US sports. In tiny markets the closing price is less reliable. For why prices move at all, see line movement.