Most prediction-market screeners rank by volume. Volume tells you what already happened; liquidity tells you what you can do now. These are the 30 Polymarket markets with the highest reported liquidity — the markets where you can place a $1K position and barely move the mid.
Top 30 Markets by Liquidity
| # | Market | Category | Liquidity | Volume |
|---|---|---|---|---|
| #1 | Will Iraq win the 2026 FIFA World Cup? | sports | $33.5M | $30.6M |
| #2 | Will New Zealand win the 2026 FIFA World Cup? | sports | $32.8M | $47.5M |
| #3 | Will Panama win the 2026 FIFA World Cup? | sports | $32.2M | $20.0M |
| #4 | Will Curaçao win the 2026 FIFA World Cup? | sports | $31.1M | $44.0M |
| #5 | Will Qatar win the 2026 FIFA World Cup? | sports | $31.0M | $45.1M |
| #6 | Will Jordan win the 2026 FIFA World Cup? | sports | $30.4M | $33.1M |
| #7 | Will Uzbekistan win the 2026 FIFA World Cup? | sports | $30.1M | $61.5M |
| #8 | Will Haiti win the 2026 FIFA World Cup? | sports | $27.0M | $33.3M |
| #9 | Will Tunisia win the 2026 FIFA World Cup? | sports | $25.5M | $36.5M |
| #10 | Will South Africa win the 2026 FIFA World Cup? | sports | $23.8M | $46.6M |
| #11 | Will Congo DR win the 2026 FIFA World Cup? | sports | $22.7M | $96.1M |
| #12 | Will Australia win the 2026 FIFA World Cup? | sports | $21.8M | $88.4M |
| #13 | Will Saudi Arabia win the 2026 FIFA World Cup? | sports | $21.1M | $57.3M |
| #14 | MicroStrategy sells any Bitcoin by May 31, 2026? | crypto | $20.1M | $294.5M |
| #15 | US x Iran ceasefire by April 7? | politics | $20.0M | $173.3M |
| #16 | Will Czechia win the 2026 FIFA World Cup? | sports | $19.4M | $57.5M |
| #17 | Will Scotland win the 2026 FIFA World Cup? | sports | $18.2M | $67.9M |
| #18 | Russia x Ukraine ceasefire by May 31, 2026? | politics | $15.5M | $126.7M |
| #19 | Netanyahu out by March 31? | politics | $14.7M | $104.2M |
| #20 | Will Iran win the 2026 FIFA World Cup? | geopolitics | $14.5M | $62.2M |
| #21 | Will Bosnia-Herzegovina win the 2026 FIFA World Cup? | sports | $13.8M | $63.5M |
| #22 | US forces enter Iran by March 31? | geopolitics | $13.8M | $73.9M |
| #23 | Will the Fed decrease interest rates by 50+ bps after the April 2026 meeting? | economics | $12.8M | $62.9M |
| #24 | Will "Donk" be said during the PGL Bucharest 2026 Grand Final? | other | $12.5M | $5.6M |
| #25 | Will Egypt win the 2026 FIFA World Cup? | sports | $11.8M | $119.1M |
| #26 | Will Argentina win on 2026-07-03? | other | $11.4M | $26.9M |
| #27 | Will Ghana win the 2026 FIFA World Cup? | sports | $10.8M | $89.1M |
| #28 | Will the Fed increase interest rates by 50+ bps after the June 2026 meeting? | economics | $10.1M | $21.7M |
| #29 | US x Iran permanent peace deal by June 15, 2026? | politics | $9.9M | $176.3M |
| #30 | Will Switzerland win the 2026 FIFA World Cup? | sports | $9.4M | $94.6M |
Liquidity = Polymarket's reported liquidity figure (Gamma API). Captured 2026-07-10 from the Protodex dataset.
Volume / Liquidity Ratio — A Cleaner Signal
A high volume-to-liquidity ratio means the market is being traded faster than market makers can replenish — a sign of fresh information. A low ratio means liquidity is sitting idle but no one's hitting it — typical of stale or boring markets. The full dataset (with 15-minute price snapshots) lets you watch this ratio over time. Get the dataset →
Practical Takeaway
- Sizing rule: Position size ≤ 5% of one-sided liquidity, or you eat 1-3¢ of slippage on entry and exit. On a 50¢ market that's a 4-6% drag — fatal for most edges.
- Bid-ask spread floor: Anything above 3¢ wide is paying market makers' rent, not capturing edge.
- Liquidity decay: Markets bleed liquidity as resolution approaches. The widest spreads are usually 1-3 days from settlement.
📊 The Full Polymarket Historical Dataset
23.0M+ price snapshots across 24,600+ prediction markets. 15-minute frequency, 99+ days of data, updated weekly. Use the same source data behind this post for your own backtests, models, and research.
Get the dataset →