Fliff vig, measured: 6.23%
Fliff ranks #20 of 21 US sportsbooks by overround over the last 30 days (lower is cheaper). Its margin is above the field average of 5.30%. In that window it was one side of a cross-book arbitrage on 370 game-markets.
Fliff vig by sport
| Sport | Overround | Rank in sport | Field average | Lines |
|---|---|---|---|---|
| NFL | 6.07% | #19 of 21 | 4.76% | 80,908 |
| MLB | 6.13% | #19 of 20 | 4.50% | 112,608 |
| MLS | 9.87% | #11 of 11 | 6.64% | 6,511 |
Daily margin, last 30 days
Overround per day by market type. Books adjust their margin around big slates and sharp action; the trend is more telling than any single day.
| Date | Moneyline | Spreads | Totals |
|---|---|---|---|
| Sep 19, 2026 | 5.88% | 6.04% | 6.62% |
| Sep 18, 2026 | 5.65% | 6.33% | 6.29% |
| Sep 17, 2026 | 5.80% | 6.06% | 5.86% |
| Sep 16, 2026 | 5.68% | 6.17% | 5.92% |
| Sep 15, 2026 | 5.66% | 6.22% | 5.92% |
| Sep 14, 2026 | 5.72% | 6.28% | 5.99% |
| Sep 13, 2026 | 6.03% | 6.00% | 6.39% |
| Sep 12, 2026 | 5.70% | 5.99% | 6.68% |
| Sep 11, 2026 | 5.56% | 6.25% | 6.30% |
| Sep 10, 2026 | 5.68% | 6.04% | 6.01% |
| Sep 9, 2026 | 5.59% | 6.18% | 6.58% |
| Sep 8, 2026 | 5.58% | 6.23% | 6.12% |
| Sep 7, 2026 | 5.63% | 6.13% | 5.79% |
| Sep 6, 2026 | 5.59% | 6.26% | 5.94% |
Which books disagree with Fliff
An arbitrage needs two books on the same line at prices summing under 100%. These are the books that produced one with Fliff most often over 30 days.
| Counterparty | Game-markets | Avg net edge | Max net edge | Last seen | |
|---|---|---|---|---|---|
| MyBookie | 65 | 4.66% | 14.98% | Sep 17, 2026 | pair page → |
| Caesars | 43 | 3.81% | 13.68% | Sep 19, 2026 | pair page → |
| BetMGM | 43 | 4.94% | 14.89% | Sep 19, 2026 | pair page → |
| betPARX | 40 | 3.71% | 13.04% | Sep 19, 2026 | pair page → |
| FanDuel | 34 | 4.83% | 14.95% | Sep 19, 2026 | pair page → |
| DraftKings | 29 | 3.22% | 10.76% | Sep 19, 2026 | pair page → |
| Fanatics Sportsbook | 28 | 6.02% | 14.26% | Sep 19, 2026 | pair page → |
| Bovada | 26 | 4.61% | 12.24% | Sep 15, 2026 | pair page → |
| Hard Rock Bet | 22 | 3.46% | 13.53% | Sep 19, 2026 | pair page → |
| ReBet | 21 | 3.64% | 14.75% | Sep 19, 2026 | pair page → |
| ESPN BET | 17 | 5.29% | 11.64% | Sep 19, 2026 | pair page → |
| BetRivers | 12 | 1.36% | 4.22% | Sep 19, 2026 | pair page → |
Recent Fliff arbitrage examples
Measured at detection, net of fees, at the reference stake shown. These windows have closed; they are a record of what the market did, not a recommendation.
| Game | Market | Net edge | Profit at stake | Detected |
|---|---|---|---|---|
| Miami Marlins @ San Diego Padres · MLB | spread 5.5 | 1.55% | $38.70 / $2,500 | Sep 19, 12:39 AM ET |
| Seattle Mariners @ Colorado Rockies · MLB | spread 1.5 | 2.32% | $58.01 / $2,500 | Sep 18, 11:07 PM ET |
| Milwaukee Brewers @ Baltimore Orioles · MLB | spread 1.5 | 1.43% | $35.86 / $2,500 | Sep 18, 10:52 PM ET |
| Atlanta Braves @ Houston Astros · MLB | moneyline | 0.35% | $8.78 / $2,500 | Sep 18, 10:37 PM ET |
| Milwaukee Brewers @ Baltimore Orioles · MLB | total 12.5 | 9.22% | $230.59 / $2,500 | Sep 18, 10:37 PM ET |
| Toronto Blue Jays @ Texas Rangers · MLB | spread 6.5 | 2.24% | $55.96 / $2,500 | Sep 18, 10:22 PM ET |
| Boston Red Sox @ Tampa Bay Rays · MLB | spread 2.5 | 12.71% | $317.83 / $2,500 | Sep 18, 9:51 PM ET |
| Boston Red Sox @ Tampa Bay Rays · MLB | total 5.5 | 13.04% | $326.09 / $2,500 | Sep 18, 9:51 PM ET |
| Athletics @ Cleveland Guardians · MLB | spread 1.5 | 8.71% | $217.62 / $2,500 | Sep 18, 9:51 PM ET |
| Philadelphia Phillies @ New York Mets · MLB | total 9.5 | 1.38% | $34.48 / $2,500 | Sep 18, 9:36 PM ET |
| Chicago Cubs @ Cincinnati Reds · MLB | total 10.5 | 6.90% | $172.41 / $2,500 | Sep 18, 9:36 PM ET |
| Chicago Cubs @ Cincinnati Reds · MLB | spread 1.5 | 11.28% | $281.95 / $2,500 | Sep 18, 9:36 PM ET |
Frequently asked questions
What is Fliff's vig?
Over the last 30 days Fliff's measured overround is 6.23% across all lines we recorded — 5.61% on moneylines, 6.49% on spreads and 6.50% on totals. That ranks #20 of 21 US books we scan (lower is cheaper).
Is Fliff a low-vig sportsbook?
Not by our measurements: its 6.23% overall margin is above the field average of 5.30%.
Which books disagree with Fliff most often?
MyBookie — 65 game-markets in 30 days where the two books quoted the same line at prices that summed to less than 100%, averaging a 4.66% net edge. Next: Caesars (43).
How is this measured?
For every line Fliff posted that our scanner ingested, both sides' odds are converted to implied probabilities and summed; the excess over 100% is the overround. Figures are weighted by lines observed and averaged over 30 days. Nothing here is estimated — every number traces to recorded lines.
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