Closing line value
Level 2 showed that a bet is worth making when its price beats the real chance. The trouble is that nobody tells you the real chance afterwards. A bet wins or loses, and one result says almost nothing about whether the price was good. Professionals solve that with the closing line.
Why the close is the yardstick
The closing line is the last price before the game starts. By then the injury news is in, the weather is known, and the biggest, best-informed bettors have had their say. Leading books like Pinnacle and Circa take large bets and move on them, so their closing number is the most accurate price the market produces. It is not perfect, but it is very hard to beat consistently.
Closing line value (CLV) asks one question: did you get a better price than that? If you took the Bears at +150 and they closed at +130, the market moved toward you. You bought something for less than the best-informed price later said it was worth.
Why CLV beats your win-loss record
Results are noisy. A bettor with a real edge can lose for months, and a bettor with none can run hot; the variance lesson puts numbers on both. CLV is a quieter signal, because every bet produces one, win or lose, and it swings far less than results do. Consistent positive CLV across a few hundred bets is stronger evidence of skill than the same bets' win-loss record. That is why sharps track it first, and why books watch it too: an account that keeps beating the close tends to get limited long before its profit shows.
Two caveats keep it honest. CLV is evidence, not money: you are still paid on results. And it means most against a sharp close. Beating one slow book's closing number proves little.
Measure it with the vig taken out
Comparing your price with the closing price on your side is a start, but the closing price carries the book's vig, which flatters you. The cleaner test uses the close's fair probability:
- Turn both sides of the closing market into implied chances.
- Remove the vig so they add up to 100%. In a two-way market, split the excess evenly between the sides.
- Subtract your price's break-even rate from your side's fair closing chance.
A positive gap means your price beat a fair version of the close. If you treat the close as the truth, it is also an estimate of your edge on that bet. For spreads and over/unders, compare at the same line only: a move from 3.5 to 3 changes the bet, not just its price.
Where to see it on Consensus Edge
We record a closing line for the games we price, from the last prices before it starts; nothing from after the start counts. Model CLV publishes how our own picks did against those closes, with sample sizes. Read its method note: a raw price comparison and the vig-free one taught above can differ by about the vig on your side of the close, as the example below shows. If you log your bets, your own account page tracks your CLV too.
Example. You take the Bears at +150 on Wednesday (illustrative prices, not live data). At kickoff the market closes Bears +130, Lions −150.
| Step | Working | Result |
|---|---|---|
| Your break-even at +150 | 100 ÷ 250 | 40.00% |
| Close, Bears +130 | 100 ÷ 230 | 43.48% |
| Close, Lions −150 | 150 ÷ 250 | 60.00% |
| Excess (the vig) | 43.48% + 60.00% − 100% | 3.48% |
| Bears fair at the close | 43.48% − (3.48% ÷ 2) | 41.74% |
| Your CLV | 41.74% − 40.00% | +1.74 points |
Comparing raw prices (43.48% − 40.00%) would say +3.48 points; half of that is the book's margin, not your edge. If the close is right, your $100 ticket is worth 0.4174 × $150 − 0.5826 × $100 = $62.61 − $58.26 = about +$4.35 on average. Had you bet +130 at the close instead, your CLV would be 41.74% − 43.48% = −1.74 points: the vig you pay for waiting.
Terms in this lesson
Closing Line ValueClosing LineFair ProbabilityImplied ProbabilityBreak-evenVigBook SharpnessVariance