What is closing line value.
CLV is the gap between the price you bet and the price the market closed at. It is the fastest honest answer to the only question that matters — are you beating the market, or just running hot.
The close is the market’s final answer. A line moves all day as information arrives — injuries, lineups, weather, and most of all, money from people who price games for a living. By the time the market closes, everything anyone was willing to bet on is in the number. The closing price is not an opinion; it is the market’s last, sharpest estimate of the game.
CLV is your price against that answer. Bet a side at +105 and watch it close -105, and you beat the close — positive CLV. You bought the same claim the market later decided was worth meaningfully more. Bet -110 and watch it close +100, and the market is telling you that you paid too much, whatever the final score ends up saying.
It beats results as a signal. Win-loss records in small samples are mostly noise — a coin flipped a hundred times routinely runs streaks that look like skill. CLV converges hundreds of bets sooner, because it grades every pick against the sharpest available benchmark instead of waiting for variance to wash out. Bettors who consistently beat the close have an edge; bettors who consistently lose to it are paying for entertainment, whatever this month’s record says.
Percentage points and cents. CLV is quoted two ways. In probability terms: the implied win probability of the close minus that of your price. In cents: the continuous distance between American prices on a scale that treats the -100/+100 seam correctly, so +105 against -105 is a ten-cent move rather than a 210-point illusion. Cents are the bettor’s convention, and they are how RunLC grades the gap.
Using it. Devig the closing quote with the vig calculator to get the market’s fair probability, then run your own price through the EV calculator against it. Do that for every bet you make, and CLV stops being a statistic you read about and becomes the scoreboard you actually manage to.
Closing line value questions
- What is closing line value?
- CLV is the difference between the price you bet and the price the market closed at. Beat the close and you have positive CLV — you bought the number for less than the market’s final, sharpest estimate said it was worth.
- Why does CLV matter more than short-term results?
- Small samples are ruled by variance. The closing line carries all the information the market gathered, so consistently beating it is the fastest reliable evidence of an edge — it shows up hundreds of bets before your bankroll does.
- How is CLV measured?
- Two common scales: implied-probability percentage points, and cents — the continuous distance between American prices, where +105 against -105 is a ten-cent move, not two hundred and ten. RunLC grades tracked picks in cents against the close.
- Can I have positive CLV and still lose the bet?
- Yes, routinely. A good price on a 45% underdog still loses more often than it wins. CLV grades the price you paid, not the outcome — over volume, positive CLV and positive results converge.
RunLC grades every tracked pick against the close — CLV in cents, automatically.