Courtside vig, measured: 4.03%
Courtside ranks #2 of 21 US sportsbooks by overround over the last 30 days (lower is cheaper). Its margin is below the field average of 4.63%. In that window it was one side of a cross-book arbitrage on 69 game-markets.
Courtside vig by sport
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 | 3.70% | 4.04% | 5.41% |
| Sep 18, 2026 | 3.50% | 3.86% | 6.04% |
| Sep 17, 2026 | 3.51% | 4.15% | 8.69% |
| Sep 16, 2026 | 3.63% | 4.30% | 7.07% |
| Sep 15, 2026 | 3.56% | 3.84% | 4.58% |
| Sep 14, 2026 | 3.49% | 3.76% | 4.34% |
| Sep 13, 2026 | 3.78% | 4.15% | 6.65% |
Which books disagree with Courtside
An arbitrage needs two books on the same line at prices summing under 100%. These are the books that produced one with Courtside most often over 30 days.
| Counterparty | Game-markets | Avg net edge | Max net edge | Last seen | |
|---|---|---|---|---|---|
| FanDuel | 14 | 0.45% | 9.03% | Sep 17, 2026 | pair page → |
| betPARX | 8 | 3.83% | 12.86% | Sep 18, 2026 | pair page → |
| BetMGM | 8 | 3.09% | 13.60% | Sep 19, 2026 | pair page → |
| Caesars | 7 | 6.79% | 13.16% | Sep 19, 2026 | pair page → |
| ESPN BET | 7 | 0.96% | 14.87% | Sep 16, 2026 | pair page → |
| MyBookie | 5 | 6.41% | 13.17% | Sep 16, 2026 | pair page → |
| Hard Rock Bet | 5 | 4.16% | 13.00% | Sep 16, 2026 | pair page → |
| Fanatics Sportsbook | 4 | 2.46% | 4.94% | Sep 19, 2026 | pair page → |
| Bally Bet | 3 | 8.44% | 10.01% | Sep 16, 2026 | pair page → |
| Fliff | 3 | 5.86% | 9.78% | Sep 17, 2026 | pair page → |
| ReBet | 3 | 6.88% | 12.35% | Sep 19, 2026 | pair page → |
| Bovada | 3 | 3.00% | 7.46% | Sep 19, 2026 | pair page → |
Recent Courtside 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 |
|---|---|---|---|---|
| San Francisco Giants @ Los Angeles Dodgers · MLB | total 7.5 | 3.45% | $86.17 / $2,500 | Sep 19, 12:39 AM ET |
| New York Yankees @ Arizona Diamondbacks · MLB | total 11.5 | 5.73% | $143.15 / $2,500 | Sep 19, 12:39 AM ET |
| New York Yankees @ Arizona Diamondbacks · MLB | spread 6.5 | 12.35% | $308.76 / $2,500 | Sep 19, 12:39 AM ET |
| Chicago Cubs @ Cincinnati Reds · MLB | spread 1.5 | 2.87% | $71.78 / $2,500 | Sep 18, 9:20 PM ET |
| Chicago Cubs @ Cincinnati Reds · MLB | total 10.5 | 7.46% | $186.42 / $2,500 | Sep 18, 9:20 PM ET |
| Toronto Blue Jays @ Texas Rangers · MLB | moneyline | 0.34% | $8.52 / $2,500 | Sep 18, 8:34 PM ET |
| Chicago Cubs @ Cincinnati Reds · MLB | moneyline | 10.31% | $257.64 / $2,500 | Sep 18, 7:48 PM ET |
| Boston Red Sox @ Tampa Bay Rays · MLB | moneyline | 0.30% | $7.62 / $2,500 | Sep 18, 3:24 PM ET |
| Athletics @ Tampa Bay Rays · MLB | total 9.5 | 2.81% | $70.22 / $2,500 | Sep 17, 3:43 PM ET |
| Boston Red Sox @ Tampa Bay Rays · MLB | total 7.5 | 0.57% | $14.27 / $2,500 | Sep 17, 3:27 PM ET |
| Miami Marlins @ Arizona Diamondbacks · MLB | total 7.5 | 4.32% | $108.06 / $2,500 | Sep 17, 12:32 AM ET |
| Atlanta Braves @ Chicago Cubs · MLB | total 9.5 | 1.47% | $36.71 / $2,500 | Sep 16, 9:45 PM ET |
Frequently asked questions
What is Courtside's vig?
Over the last 30 days Courtside's measured overround is 4.03% across all lines we recorded — 3.58% on moneylines, 3.90% on spreads and 5.50% on totals. That ranks #2 of 21 US books we scan (lower is cheaper).
Is Courtside a low-vig sportsbook?
Relative to the 21 books we measure, yes: its 4.03% overall margin is below the field average of 4.63%.
Which books disagree with Courtside most often?
FanDuel — 14 game-markets in 30 days where the two books quoted the same line at prices that summed to less than 100%, averaging a 0.45% net edge. Next: betPARX (8).
How is this measured?
For every line Courtside 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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