NFL prediction market volume reached $167.8 million in the week ending August 16, up 324.4% from $39.5 million the week prior, according to DeFi Rate data.
Preseason game markets accounted for $143.5 million of that total, or 85.5%, across Kalshi, Polymarket Global and Polymarket US.
The total cumulative volume on all NFL prediction markets now stands at $236.9 million, with the latest week alone accounting for 71%. Set against everything else, NFL markets are still relatively small.
| Venue | Total volume | NFL volume | NFL share |
|---|---|---|---|
| Kalshi | $8,671,418,253 | $126,632,249 | 1.46% |
| Polymarket Global | $1,087,109,981 | $7,650,551 | 0.70% |
| Polymarket US | $819,929,432 | $33,546,837 | 4.09% |
| Total | $10,578,457,666 | $167,829,638 | 1.59% |
Futures markets grew while share percentage fell
Futures carried the market through July, holding 98.5% of tracked volume in the week of July 6–12 and only 30.4% four weeks later.
Preseason contracts overtook futures starting with the Hall of Fame Game between the Carolina Panthers and Arizona Cardinals. That game traded $19.42 million on Kalshi across the reporting window, more than any other preseason matchup.
Dallas Cowboys against the Seattle Seahawks is next at $12.97 million, followed by the Los Angeles Rams against the Kansas City Chiefs at $9.88 million.
Props reached $4.04 million, 113.5 times the July 6–12 level and up 50.1% week-over-week. Regular-season contracts reached $462,439, a 184.2% weekly gain off a small base, while combos posted $261,826, all of it on Polymarket Global.
| Category | Jul 6-12 | Jul 13-19 | Jul 20-26 | Jul 27-Aug 2 | Aug 3-9 | Aug 10-16 |
|---|---|---|---|---|---|---|
| Preseason | $14.9K | $13.8K | $44.8K | $80.4K | $24.69M | $143.51M |
| Futures | $4.77M | $6.32M | $8.40M | $9.11M | $12.00M | $19.56M |
| Props | $35.6K | $51.4K | $225.7K | $270.1K | $2.69M | $4.04M |
| Regular Season | $19.0K | $41.0K | $51.6K | $62.6K | $162.7K | $462.4K |
| Combos | $0 | $0 | $0 | $0 | $3,969 | $261.8K |
| Total | $4.84M | $6.43M | $8.72M | $9.53M | $39.55M | $167.83M |
Share of NFL volume by category
| Category | Aug 10-16 | % of NFL volume |
|---|---|---|
| Preseason | $143.51M | 85.5% |
| Futures | $19.56M | 11.7% |
| Props | $4.04M | 2.4% |
| Regular Season | $462.4K | 0.3% |
| Combos | $261.8K | 0.2% |
Volume splits unevenly across the venues
Kalshi’s grip in some products was stronger than in others:
- 78.8% of preseason
- 81.4% of props
- 74.4% of regular-season contracts
- 50.6% of futures
Polymarket Global holds 8.2% of futures, its strongest position outside combos, where it accounts for all tracked volume.
Polymarket Global’s four-figure percentage gain comes off a base of $493,607. The US platform grew 489.6% from a larger $4,204,186 base, with official Daily Market Report files posted for every business date through August 16.
| Venu | Preseason | WoW | % of preseason |
|---|---|---|---|
| Kalshi | $113.1M | +465.8% | 78.8% |
| Polymarket Global | $5.6M | +1,038.3% | 3.9% |
| Polymarket US | $24.8M | +489.6% | 17.3% |
| Tracked total | $143.5M | +481.3% | 100.0% |
Monyeline dominates preseason volume
| Market type | Polymarket Global | Polymarket US |
|---|---|---|
| Moneyline (incl. period winners) | $4.06M (62.6%) | $20.68M (68.4%) |
| Spreads | $1.10M (17.0%) | $4.53M (15.0%) |
| Totals | $1.06M (16.3%) | $3.79M (12.5%) |
| Other game props | $1,224 (<0.1%) | $1.22M (4.0%) |
| Pure-preseason combos | $265,783 (4.1%) | $0 (0.0%) |
| All preseason | $6.49M | $30.22M |
Kalshi and Polymarket Global figures cover August 1–17, 2026, through 09:00 UTC. Polymarket US covers official business dates through August 16. All three run ahead of the weekly totals above, which stop at August 16.
The next slate of games opened this morning with early flow clustering around four games. Volumes are at most five-figure, so the ordering matters more than the levels this far out.
- Las Vegas Raiders at Houston Texans (Aug. 20) – $13,720
- Buffalo Bills at Cleveland Browns (Aug 22) – $12,038
- San Francisco 49ers at San Diego Chargers (Aug 20) – $11,437
- New York Jets at Pittsburgh Steelers (Aug 21) – $11,165
Panthers–Jacksonville Jaguars, Baltimore Ravens–Minnesota Vikings and Seattle Seahawks–Tennessee Titans are each under $2,200. Should that spread hold into the weekend, next week’s preseason total will sit on a narrow set of matchups with a long, thin tail behind it. Combos are the category to watch after that.
The underlying dataset used in this article is available here with proper link attribution if used. All figures are subject to revision as additional data is ingested by DeFiRate.com.
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