What is closing line value (CLV)? How to beat the close

Advanced2 min read

Wins and losses take thousands of bets to mean anything. Closing line value gives you an answer much sooner: did you get a better price than the market settled on by kick-off?

What the closing line is

The closing line is the last price before a game starts. By then the market has absorbed injury news, weather, lineups and the biggest bets from the sharpest bettors. Closing prices from sharp, high-limit books are widely treated as the most accurate estimate of each side’s chances that exists.

Measuring CLV

  1. Record the price you bet.
  2. At kick-off, take both sides of the closing line from a sharp source and remove the vig.
  3. Compute the EV of your price against that no-vig closing probability.

CLV % = no-vig closing probability × your decimal odds − 1

For spreads and totals you can also count points: taking −2.5 on a game that closes −3.5 is a full point of CLV — and in the NFL, getting through 3 like that is worth far more than most single points.

Why it is the best evidence of an edge

A single bet’s result is mostly luck. But if your prices are consistently better than the close, you are buying at less than the market’s best estimate of no-vig value — the definition of a +EV bet. Over a few hundred bets CLV settles down much faster than profit and loss does.

Caveats

  • The close is most reliable on big, liquid markets. On thin markets it can still be wrong.
  • Use a no-vig close from sharp sources, not the price at the book you bet. A soft book’s close includes its own margin and biases; retail books even spread their margin differently from sharp ones (see de-vig methods compared).
  • Positive CLV does not guarantee a profit, and books may limit accounts that beat the close consistently.

The NO-VIG column on every game is a live consensus from sharp sources with the vig removed — the number to compare against when a game kicks off. See how no-vig odds work.

Frequently asked questions

What is closing line value (CLV)?

Closing line value measures how the price you bet compares with the final price before the game starts. If you bet +120 and the market closes at a no-vig +114, you beat the close and have positive CLV.

How do you calculate CLV?

De-vig the closing line to get a no-vig closing probability, then compute the expected value of your price against it: CLV % = no-vig closing probability × your decimal odds − 1.

Why does closing line value matter?

The closing line reflects the most information and the most money, so it is the best available estimate of the true probability. Bettors who consistently get better prices than the close are very likely to have a real edge, even before results confirm it.

Can I beat the closing line and still lose?

Yes. CLV measures the quality of the price, not the result. Over a small number of bets results are mostly noise; over hundreds of bets, consistent positive CLV and long-run results tend to line up.

Live odds boards: NFL odds · NCAAF odds · NBA odds · NCAAB odds · NHL odds · MLB odds · WNBA odds · MMA odds · Cricket odds · EPL odds · MLS odds · UCL odds · Liga MX odds · La Liga odds · Serie A odds · Bundesliga odds · Ligue 1 odds · ATP odds · WTA odds

21+ | Gambling problem? Call 1-800-GAMBLER. Nothing here is betting advice, and no bet or strategy guarantees a profit. Sports betting is legal only in some US states; check the rules where you are. Responsible gambling.