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Category Breakdown
Compare volume and activity across platforms by category
Kalshi Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 26,156 | $2.5M | +20.5% |
| Sports | 4,196,212 | $405.4M | +9.5% |
| Crypto | 9,305 | $78.4M | +15.9% |
| Economics | 3,654 | $1.3M | +127.4% |
| Finance | 6,532 | $1.8M | -5.2% |
| Tech | 995 | $201.4K | +77% |
| Culture | 9,457 | $970.1K | +254.1% |
| Weather | 1,223 | $952.1K | +47.8% |
| Misc | 1,879 | $208.6K | -15.2% |
| World | 614,674 | $23.6M | +156.4% |
Polymarket Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 3,600 | $21.6M | +1.8% |
| Sports | 5,631 | $241.6M | +7.3% |
| Crypto | 6,195 | $37.9M | +7.6% |
| Economics | 404 | $1.4M | +15.9% |
| Finance | 536 | $733.4K | -54.5% |
| Tech | 328 | $4.7M | -6.7% |
| Culture | 386 | $2.2M | +135.3% |
| Weather | 53 | $54.1K | +91.7% |
| Misc | 33,671 | $119.6M | +3.1% |
| Mentions | 11 | $2.6K | -8.3% |
Kalshi Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 25,528 | $20.6M | +3.2% |
| Sports | 2,084,078 | $2.8B | +18.3% |
| Crypto | 23,567 | $669.6M | +3.8% |
| Economics | 2,949 | $6.0M | -52.8% |
| Finance | 11,531 | $5.2M | -39.8% |
| Tech | 735 | $1.4M | +35.3% |
| Culture | 4,506 | $8.3M | +5.1% |
| Weather | 4,086 | $5.6M | -36.2% |
| Misc | 18,233 | $21.4M | +242.3% |
| World | 307,903 | $115.1M | +109% |
Polymarket Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 3,038 | $155.0M | -10.1% |
| Sports | 3,665 | $1.6B | -3.3% |
| Crypto | 19,154 | $291.2M | -16.5% |
| Economics | 277 | $10.9M | -88.2% |
| Finance | 465 | $6.6M | -58.4% |
| Tech | 315 | $4.2M | -9% |
| Culture | 261 | $4.9M | +8.7% |
| Weather | 52 | $241.2K | +90.6% |
| Misc | 53,782 | $871.5M | -16.8% |
| Mentions | 12 | $9.0K | -71.7% |
Kalshi Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 73,680 | $128.9M | +21.8% |
| Sports | 5,868,282 | $8.7B | +26.9% |
| Crypto | 90,505 | $2.3B | +86.1% |
| Economics | 9,663 | $42.5M | +13.7% |
| Finance | 37,453 | $25.3M | +69.7% |
| Tech | 1,508 | $4.9M | +38.3% |
| Culture | 10,247 | $27.2M | -2.2% |
| Weather | 40,137 | $32.5M | -2% |
| Misc | 45,321 | $104.4M | +263.1% |
| World | 573,985 | $204.8M | +261.2% |
Polymarket Categories
| Category | Markets | Volume | Change |
|---|---|---|---|
| Politics | 4,572 | $701.5M | -9.1% |
| Sports | 15,651 | $5.0B | +197.5% |
| Crypto | 62,665 | $1.4B | +118.3% |
| Economics | 454 | $159.9M | +12.3% |
| Finance | 982 | $51.0M | +26.9% |
| Tech | 562 | $20.8M | -24.7% |
| Culture | 533 | $21.6M | -78.5% |
| Weather | 154 | $1.5M | +11.4% |
| Misc | 158,802 | $3.7B | +145.5% |
| Mentions | 24 | $70.2K | -80.1% |
Weekly volume analysis
Kalshi Tops $7.5B With a Day Left, Smashing Its Own Weekly Volume Record
Kalshi has already surpassed $7.49 billion in notional volume for the week of June 15, surpassing its prior record of $6.38B with Sunday’s session still open. The partial total runs 17.5% above the previous record through just six closed days, putting Kalshi on track for its first $8B-plus week — a likely $8.5B to $8.9B […]
Kalshi Crosses $100B Milestone as World Cup Drives Daily Volume Over $1B
Kalshi crossed $100 billion in lifetime notional volume last week, and followed it up with its first-ever billion-dollar trading days on Saturday and Sunday. Kalshi’s notional volume total for the week of June 8 came in at $6.38 billion, up 43% from $4.46B the prior week, marking yet another weekly volume record by a wide […]
Kalshi Sets $17.9B Record May as World Cup Lifts Polymarket US to Weekly High
Kalshi closed May with $17.91 billion in notional volume, its ninth consecutive monthly record and a 21% jump from April’s then-record $14.81B, according to DeFi Rate’s prediction markets volume tracker. Polymarket posted $7.08 billion in the same month, representing a 21% decline from its $10.57B March peak and its lowest monthly total since January. The […]
Forecast: World Cup Prediction Market Volume Could Hit $2.5 Billion in the US
Prediction markets could drive as much as $2.5 billion in trading activity on the 2026 World Cup, with $1.47-1.93 billion trading on Kalshi. The current World Cup Winner contract is trending higher than March Madness and will likely reach ~$253 million in volume by the end of the tournament.
Prediction Markets Cross $5.6B Week, Kalshi Takes 71% of Volume
Kalshi remained on pace for another monthly volume record during the week of May 18, while Polymarket’s decline widened the gap between the two largest prediction market platforms. Kalshi posted $3.99 billion in notional volume, up 3% from the prior week, according to DeFi Rate’s volume tracker. Polymarket fell 15% to $1.65 billion, down from […]
Texas Political Volume at Kalshi Focusing on Cornyn-Paxton Runoff
Texas political markets have reached $24.2 million of trading volume on Kalshi, but less than $200K in open interest separates Paxton from Cornyn.
Top Markets by Volume
Highest trading activity across platforms
World Cup Winner
PolymarketColombia vs Congo DR
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KalshiColombia vs Congo DR: Spread
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KalshiWill both teams score in the match between Colombia and Congo DR on 2026-06-23 10:00PM ET?: Both Teams To Score
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KalshiBaltimore vs Los Angeles A
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KalshiMilwaukee vs Cincinnati
KalshiLiu vs Bonardi
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PolymarketStrait of Hormuz traffic returns to normal by end of June?
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KalshiWhat price will Bitcoin hit in June?
PolymarketBoston vs Colorado
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KalshiFerguson vs Yamanaka
KalshiEngland vs Ghana: First Half Winner
KalshiPortugal vs Uzbekistan: Team Total
KalshiSamsonova vs Svitolina
KalshiEngland vs. Ghana - Exact Score
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KalshiScotland vs Brazil
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PolymarketBTC 15 min · $62,565.01 target
KalshiPortugal vs Uzbekistan: First Half Total
KalshiSeattle vs Pittsburgh
KalshiBurruchaga vs Fery
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PolymarketBTC price on Jun 23, 2026 at 2pm EDT?
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PolymarketBTC price on Jun 24, 2026 at 1am EDT?
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KalshiBTC price on Jun 23, 2026 at 10pm EDT?
KalshiWill Congo DR win against Colombia in the World Cup match scheduled for Jun 23, 2026?
Polymarket USElon Musk # tweets June 19 - June 26, 2026?
PolymarketBTC 15 min · $62,698.49 target
KalshiFed Decision in July?
PolymarketUS-Iran Final Nuclear Deal by…?
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KalshiBTC price on Jun 23, 2026 at 9pm EDT?
KalshiBTC price on Jun 24, 2026 at 2am EDT?
KalshiWill Colombia score more than 1.5 goals in 90 minutes plus stoppage time of COL vs COD?: Colombia total goals
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PolymarketJordan vs. Algeria
PolymarketLargest IPO by market cap in 2026?
PolymarketTürkiye vs. United States
PolymarketBitcoin above ___ on June 23?
PolymarketWill the Boston Red Sox win the first 5 innings vs the Colorado Rockies?
Polymarket USColombia vs. DR Congo
PolymarketSouth Africa vs. Korea Republic
PolymarketWill the Scotland cover 1.5 vs the Brazil in SCO vs BRA?
Polymarket USBrazil Presidential Election
PolymarketEcuador vs. Germany
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PolymarketNorway vs. France
PolymarketWill the Iranian regime fall by June 30?
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PolymarketMLB: 2026 NL Cy Young Winner
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PolymarketNext UK Prime Minister in 2026?
PolymarketJapan vs. Sweden
PolymarketWhich company has best AI model end of June?
PolymarketElon Musk # tweets June 23 - June 30, 2026?
PolymarketWill the total in COL vs COD be more than 1.5?
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Polymarket2026 Men’s Wimbledon Winner
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Polymarket USNorway vs. Senegal - Exact Score
PolymarketElon Musk # tweets June 16 - June 23, 2026?
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Polymarket USWho will be the next Prime Minister of Israel after the next election?
PolymarketWNBA: Rebounds Per Game Leader
PolymarketWill __ ships transit the Strait of Hormuz on any day by June 30?
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Polymarket USColombia vs. DR Congo - More Markets
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PolymarketWill COL vs COD finish COL wins 2-1?
Polymarket USPanama vs. Croatia - Exact Score
PolymarketCounter-Strike: FOKUS vs OG (BO3) - DraculaN Group B
PolymarketHighest temperature in Chicago on June 23?: 72 to 73
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Polymarket USWill Colombia win the second half against Congo DR?
Polymarket USWill Cote d'Ivoire win against Curacao in the World Cup match scheduled for Jun 25, 2026?
Polymarket USWill the total in MAR vs HAI be more than 2.5?
Polymarket USWill the total in MAR vs HAI be more than 1.5?
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Polymarket USCounter-Strike: Sharks vs Eternal Fire (BO3) - DraculaN Group A
PolymarketEngland vs. Ghana - Total Corners
PolymarketWill the total in COL vs COD be more than 0.5?
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Polymarket USWill any run be scored in the 1st inning of ATH vs SF?: San Francisco Giants
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Polymarket USTravelers Championship End of Round 1 Leader: Scottie Scheffler
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KalshiArgentina vs. Austria
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Polymarket USWorld Cup: Golden Boot Winner
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PolymarketWill the total in ARG vs AUT be more than 2.5?
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PolymarketUS announces new Iran agreement/ceasefire extension by...?
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PolymarketWill Switzerland win against Bosnia-Herzegovina in the World Cup match scheduled for Jun 18, 2026?
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PolymarketNetherlands vs. Sweden
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PolymarketEngland vs. Ghana - More Markets
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PolymarketEngland vs. Ghana
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Polymarket USPortugal vs. DR Congo
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PolymarketLoL: Dplus KIA vs Hanwha Life Esports (BO5) - Esports World Cup Korea Qualifier Playoffs
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KalshiNext UK Prime Minister in 2026?
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KalshiWho will be the next Prime Minister of Israel after the next election?
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PolymarketBrazil vs. Haiti
PolymarketNorway vs. Senegal
PolymarketBrazil Presidential Election
PolymarketNext French Presidential Election
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KalshiNext leader out of power before 2027? (No Orban)
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PolymarketHow many Fed rate cuts in 2026?
PolymarketTürkiye vs. United States
PolymarketGiannis Antetokounmpo's Next Team
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KalshiIsrael closes its airspace by...?
PolymarketCzechia vs Mexico
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PolymarketElon Musk # tweets June 19 - June 26, 2026?
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KalshiBTC price on Jun 26, 2026 at 5pm EDT?
KalshiNew US-Iran nuclear deal in 2026?
KalshiBTC 15 min · $62,541.62 target
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KalshiCombo
KalshiCombo
KalshiCombo
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KalshiMinnesota vs Texas
KalshiCombo
KalshiToronto vs Boston
KalshiWill Trump's approval rating increase this week? (6/12-6/19)?
KalshiCombo
KalshiCombo
KalshiTrump late night post this week? (6/14-6/20)
KalshiCombo
KalshiGV Club Deportivo San Jose de Oruro vs CD Real Tomayapo
KalshiCombo
KalshiLos Angeles A vs A's
KalshiCombo
KalshiCombo
KalshiCombo
KalshiWorld Cup Winner
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Polymarket USUS x Iran permanent peace deal by...?
PolymarketFed Decision in June?
PolymarketWill United States win against Paraguay in the World Cup match scheduled for Jun 12, 2026?
Polymarket US2026 Men's World Cup winner?
KalshiWill Portugal win against Uzbekistan in the World Cup match scheduled for Jun 23, 2026?
Polymarket USWill United States win against Australia in the World Cup match scheduled for Jun 19, 2026?
Polymarket USU.S. Open First Round Leader: Wyndham Clark
Polymarket USDemocratic Presidential Nominee 2028
PolymarketFIFA World Cup Group E Winner: Germany
Polymarket USWill Netherlands win against Japan in the World Cup match scheduled for Jun 14, 2026?
Polymarket USWill Portugal win against Congo DR in the World Cup match scheduled for Jun 17, 2026?
Polymarket USPresidential Election Winner 2028
PolymarketWhat price will Bitcoin hit in May?
PolymarketParis Saint-Germain FC vs. Arsenal FC
PolymarketSpain vs. Cabo Verde
PolymarketArgentina vs. Austria
PolymarketStrait of Hormuz traffic returns to normal by end of May?
PolymarketWill England win against Ghana in the World Cup match scheduled for Jun 23, 2026?
Polymarket USUnited States vs. Paraguay
PolymarketWill Morocco win against Scotland in the World Cup match scheduled for Jun 19, 2026?
Polymarket USWill Spain win against Cabo Verde in the World Cup match scheduled for Jun 15, 2026?
Polymarket USRepublican Presidential Nominee 2028
PolymarketWill the Iranian regime fall by May 31?
PolymarketGermany vs. Curaçao
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Polymarket USStrait of Hormuz traffic returns to normal by end of June?
PolymarketNext French Presidential Election
PolymarketLos Angeles Mayoral Election winner?
KalshiWorld Cup: Golden Boot Winner
PolymarketF1 Drivers' Champion
PolymarketWhat price will Bitcoin hit in June?
PolymarketArgentina vs. Austria - More Markets
PolymarketWill Brazil win against Morocco in the World Cup match scheduled for Jun 13, 2026?
Polymarket USWill Germany win against Cote d'Ivoire in the World Cup match scheduled for Jun 20, 2026?
Polymarket USWill the Iranian regime fall by June 30?
PolymarketWill Mexico win against Korea Republic in the World Cup match scheduled for Jun 18, 2026?
Polymarket USUS and Iran sign an agreement by...?
PolymarketBrazil Presidential Election
PolymarketWill Norway win against Senegal in the World Cup match scheduled for Jun 22, 2026?
Polymarket USNetherlands vs. Japan
PolymarketPanama vs Croatia
KalshiUEFA Champions League Winner
PolymarketWill Japan win against Netherlands in the World Cup match scheduled for Jun 14, 2026?
Polymarket USWill Colombia win against Congo DR in the World Cup match scheduled for Jun 23, 2026?
Polymarket USUnited States vs. Australia
PolymarketCollege Baseball World Series Champion: Oklahoma
Polymarket US2026 Seoul Mayoral Election Winner
PolymarketWill Belgium win against Egypt in the World Cup match scheduled for Jun 15, 2026?
Polymarket USKorea Republic vs. Czechia
PolymarketU.S. Open Second Round Leader: Wyndham Clark
Polymarket USGhana vs. Panama
PolymarketWill IR Iran win against New Zealand in the World Cup match scheduled for Jun 15, 2026?
Polymarket USWill Brazil win against Haiti in the World Cup match scheduled for Jun 19, 2026?
Polymarket USWill Ecuador win against Cote d'Ivoire in the World Cup match scheduled for Jun 14, 2026?
Polymarket USWill Turkiye win against Paraguay in the World Cup match scheduled for Jun 19, 2026?
Polymarket USSpain vs. Saudi Arabia - More Markets
PolymarketCanada vs. Bosnia-Herzegovina
PolymarketStrait of Hormuz traffic returns to normal by June 15?
PolymarketWill Uruguay win against Saudi Arabia in the World Cup match scheduled for Jun 15, 2026?
Polymarket USIraq vs. Norway
PolymarketIran closes its airspace by...?
PolymarketIraq vs. Norway - More Markets
PolymarketIsrael announces Lebanon ceasefire extension by...?
PolymarketFed Decision in July?
PolymarketWill the US confirm that aliens exist by...?
PolymarketWill Crude Oil (CL) hit__ by end of June?
PolymarketSwitzerland vs. Bosnia-Herzegovina
PolymarketQatar vs. Switzerland - More Markets
PolymarketCalifornia Governor Election Winner
PolymarketSpain vs. Saudi Arabia
PolymarketWill Sweden win against Tunisia in the World Cup match scheduled for Jun 14, 2026?
Polymarket USIran agrees to end enrichment of uranium by June 30?
PolymarketWill the total in ARG vs AUT be more than 2.5?
Polymarket USSpurs vs. Knicks
PolymarketUnited States vs. Australia - More Markets
PolymarketKharg Island no longer under Iranian control by...?
PolymarketWho will be the next Prime Minister of Israel after the next election?
PolymarketWill France win against Iraq in the World Cup match scheduled for Jun 22, 2026?
Polymarket USWorld Cup: Team to advance to Knockout Stages
PolymarketWill Korea Republic win against Czechia in the World Cup match scheduled for Jun 11, 2026?
Polymarket USLargest Company end of June?
PolymarketHow many Fed rate cuts in 2026?
PolymarketIsrael x Iran permanent peace deal by...?
PolymarketWhich company has best AI model end of June?
PolymarketStrait of Hormuz traffic returns to normal by July 31?
PolymarketWill the U.S. invade Iran before 2027?
PolymarketMLB World Series Champion 2026
PolymarketNFL Champion 2027
PolymarketWhat price will Bitcoin hit in 2026?
PolymarketWhen will traffic at the Strait of Hormuz return to normal?
KalshiIran leader end of 2026?
PolymarketNext UK Prime Minister in 2026?
PolymarketTurkiye vs USA
KalshiDemocratic Presidential nominee in 2028?
KalshiColombia vs Congo DR
KalshiWho will be the next governor of California?
KalshiNew US-Iran nuclear deal in 2026?
KalshiHouston vs Toronto: Total Runs
KalshiLos Angeles mayoral election: Spencer Pratt vote percent (1st round)
KalshiGiannis Antetokounmpo's Next Team
KalshiWho will finish 1st in the California Governor primary election?
KalshiWho will win the next Peruvian presidential election?
KalshiPanama vs Croatia: Total Goals
KalshiCzechia vs Mexico
KalshiFIFA World Cup Golden Boot Winner
KalshiWill the U.S. confirm that aliens exist before 2027?
KalshiNew York Y vs Detroit
KalshiEcuador vs Germany
KalshiPanama vs Croatia: Spread
KalshiWorld Cup Round of 16 Qualifiers
Kalshi#1 overall pick in 2026?
KalshiWill United States win against Turkiye in the World Cup match scheduled for Jun 25, 2026?
Polymarket USUFC 329: McGregor vs. Holloway 2
KalshiWill Germany win against Ecuador in the World Cup match scheduled for Jun 25, 2026?
Polymarket USWho will win the next Colombian presidential election?
KalshiPro Baseball Champion
KalshiFIFA World Cup Winner: France
Polymarket USFed decision in Jul 2026?
KalshiNext US Presidential Election Winner?
KalshiWorld Cup Quarterfinals Qualifiers
KalshiLove Island USA: Winning Couple
KalshiFIFA World Cup Winner: United States
Polymarket USWill Argentina win against Jordan in the World Cup match scheduled for Jun 27, 2026?
Polymarket USWho will attend UFC Freedom 250?
KalshiFIFA World Cup Winner: Argentina
Polymarket USWill Japan win against Sweden in the World Cup match scheduled for Jun 25, 2026?
Polymarket USWho will have a #1 song on Spotify USA in May?
KalshiWhat will Trump say this week?
KalshiFIFA World Cup Winner: England
Polymarket USWill Cote d'Ivoire win against Curacao in the World Cup match scheduled for Jun 25, 2026?
Polymarket USTravelers Championship Winner: Scottie Scheffler
Polymarket USFIFA World Cup Group F Winner: Japan
Polymarket USWhat will Trump say this week?
KalshiWho will have a #1 song on Spotify Global in May?
KalshiWhat will Trump say this week?
KalshiTop AI model this month
KalshiWhat will Trump say this month?
KalshiWhat will Trump say this week?
KalshiHow many times will Trump visit Mar-a-Lago in May 2026?
KalshiNantes vs Toulouse
KalshiTexas Republican Senate runoff: who endorses who?
KalshiNumber of tornadoes in May 2026?
KalshiTrump's approval rating on Jun 19, 2026?
KalshiTrump's approval rating on Jun 12, 2026?
KalshiTop AI model this week?
KalshiNamibia vs Nigeria
KalshiTop AI model this week
KalshiTrump's approval rating on May 29, 2026?
KalshiTrump's approval rating on Jun 5, 2026?
KalshiHow many days will Trump be photographed this week? (6/15-6/21)
KalshiTop AI model in this week
KalshiWill Trump be photographed every day this week? (5/18-5/24)
KalshiHow many House votes to expel Eric Swalwell?
KalshiHow strong of an earthquake will occur before Jun 1, 2026?
KalshiCombo
KalshiTop AI model this week
KalshiWill Trump be photographed every day this week? (6/8-6/14)
KalshiNC Dinos vs KT Wiz
KalshiWill any NATO member state boycott the USA World Cup in 2026?
KalshiHow we collect data
DeFi Rate pulls prediction market data directly from platform APIs on a rolling basis. Kalshi data is sourced from the Kalshi REST API, which provides market-level contract data including volume, open interest, resolution status, and native category classifications. Polymarket data is sourced from the Polymarket GraphQL API, which exposes market-level trading activity, liquidity, and outcome probabilities across its decentralized order book. We also support ForecastX, Gemini and Polymarket US, though the data provided is limited in scope compared to Kalshi and Polymarket (international)
Data is fetched at 30-minute intervals, cleaned and stored on our end. All figures reflect each platform’s public API at the time of the most recent refresh.
Volume methodology
All volume figures are calculated on a rolling window basis, not calendar periods. A 24-hour rolling window captures all trades recorded in the 24 hours preceding each data pull. A 7-day window covers the trailing 7 days; a 30-day window covers the trailing 30 days. Figures update continuously and will differ from calendar-period totals (e.g., “volume this month”) published elsewhere.
Volume is denominated in USD. Kalshi reports native USD figures. Polymarket volume is denominated in USDC and converted to USD at a 1:1 rate, consistent with USDC’s peg.
Category taxonomy
Kalshi categories reflect the platform’s native classification system as returned by the Kalshi API. Polymarket does not enforce a rigid native taxonomy; categories displayed for Polymarket markets are assigned by DeFi Rate using a standardized classification schema mapped against market title and tag data. The schema assigns each market to one of the following categories: Politics, Sports, Crypto, Economics, Finance, Tech, Culture, Weather, Misc, and World. Markets carrying Polymarket’s native “mentions” tag are classified separately as Mentions. Category assignments are reviewed periodically and updated when platform tagging changes.
Leading outcome
The Leading column in the Top Markets table displays the current frontrunner for each market. For binary markets, this is the outcome trading above 50% implied probability. For multi-outcome markets, it is the outcome with the highest current implied probability. The probability figure shown reflects the last traded price for that contract. “Outcome” in place of a probability indicates the market has resolved and the displayed entry is the confirmed result.
Status definitions
Active markets are open for trading at the time of the data pull. Closed markets have passed their end date or been resolved by the platform. DeFi Rate does not distinguish between platform-level “expired” and “settled” statuses in the display layer; both appear as Closed.
Polymarket US top 30 markets
The Polymarket US Top 30 tab filters to markets accessible to US-based traders under Polymarket’s geofenced access rules. Polymarket restricts certain political and financial markets from US IP addresses; this view reflects the subset of the Polymarket top 30 reachable from a US connection at the time of the data pull. Availability is determined by Polymarket’s own access-control layer and may change without notice.
Change percentage
The change figure displayed alongside each volume metric is the percentage difference between the current rolling window and the equivalent prior period. For a 30-day reading, the comparison window is days 31–60 immediately preceding the current window. A positive value indicates higher volume in the most recent window; a negative value indicates lower volume. Change figures apply at the platform level, category level, and individual market level depending on context.
Market count figure
The Markets figure in the Category Breakdown table reflects the total number of discrete contracts within each category, not the number of parent events. On Kalshi, a single event (e.g., “NBA Champion 2026”) may contain multiple contracts — one per team — and each is counted separately. On Polymarket, each market URL corresponds to a single binary outcome and is counted as one market. Kalshi market counts are therefore not directly comparable to Polymarket market counts at the category level, though this is often used in the media.
Open interest
Open interest reflects the total value of unsettled contracts currently held by traders on a given market. It is pulled directly from each platform’s API and represents outstanding exposure at the time of the data pull, not cumulative traded volume. A dash (—) in the Open Int. column indicates the field was not returned in the API response for that market.
