Closing line value, or CLV, is the difference between the line you bet and the line at kickoff. Bet a team at -3 and watch it close at -4.5, and you beat the closing line by 1.5 points. Because the closing line is the most accurate price the market produces, consistently beating it is the best evidence a bettor has an edge, and it shows up long before wins and losses do.
Updated Sept. 16, 2026.
Any single bet can win or lose on luck. Over a season a bettor's record is still mostly luck: a 55 percent bettor has a real chance of finishing under 50 percent on 200 bets. Closing line value removes the coin flip. If you routinely get -3 on teams that close at -4, you are seeing what the market sees, earlier. Sportsbooks limit bettors on CLV, not on record, because CLV is the signal.
CLV is measured in points for spreads and totals and in implied probability for moneylines. A half point of CLV on a spread is worth roughly 1.5 to 2 percent of win probability depending on the number; getting through a key number like 3 or 7 is worth more. Over hundreds of bets, average CLV in cents or points converts to an expected return.
The practical use is discipline. Bets with negative CLV, where the line moved against you, are not automatically bad, but a portfolio of them is. This site's play ledger records the line at the time of the play and the closing line so every play has a CLV, and the season summary reports it next to the record.
You bet the Chiefs -2.5 on Tuesday. Injury news lands Friday and the line closes at -4. You have 1.5 points of CLV, and you got through 3, the most common winning margin. Whether the Chiefs cover on Sunday is mostly noise; the 1.5 points is signal.
CLV (spread or total) = closing line minus bet line, signed so that positive is favorable to your side. CLV (moneyline) = closing implied probability minus bet implied probability, with the vig removed from both. Average CLV over a sample of bets is the estimate of edge.
Over a small sample, yes. Wins and losses on 100 bets are dominated by variance; CLV on 100 bets is a reliable read on whether the bets were good. Over thousands of bets the two converge, because positive CLV produces wins.
Consistently positive is the bar. Professional bettors average roughly half a point on NFL sides, or 1 to 3 percent in implied probability on moneylines. A season of +0.5 points average CLV on spreads is a strong result.
Because it identifies the bettors who are ahead of the market. A book cannot tell a lucky bettor from a good one by record, but a bettor who beats the close on most bets is moving lines in the right direction, and books limit those accounts.
Category: Stats & Analytics. Part of the StickToTheModel NFL Encyclopedia.