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36,404 open markets I track on both venues: every market that traded in the last day, plus any market someone watches. Sort by volume, edits or end date.

Market	Venue	Yes	24h vol	Ends
Will Tim Walz win the 2028 Democratic presidential nomination? Democratic Presidential Nominee 2028	Polymarket	0¢	$198k	Nov 8
Spread: Real Betis Balompié (-1.5) Real Betis Balompié vs. Málaga CF - More Markets	Polymarket	11¢	$195k	Oct 31
Spread: Trail Blazers (-8.5) Trail Blazers vs. Jazz	Polymarket	69¢	$193k	Oct 31
Illinois vs. Maryland	Polymarket	100¢	$190k	Oct 31
Oklahoma State vs. Iowa State	Polymarket	44¢	$190k	Oct 31
Will Republicans win the Senate race in Kansas?: Roger Marshall	Kalshi	50¢	$189k	Nov 3
Rolex Paris Masters, Qualification: Adolfo Vallejo vs Grigor Dimitrov	Polymarket	91¢	$188k	in 6 days
Will Democratics win the Senate race in Kansas?: Adam Hamilton	Kalshi	51¢	$188k	Nov 3
Will CF América win on 2026-10-31? CF América vs. Deportivo Toluca FC	Polymarket	20¢	$187k	Nov 1
Will Bitcoin dip to $75,000 in October? What price will Bitcoin hit in October?	Polymarket	0¢	$187k	Nov 1
Will the Republicans win the Florida governor race in 2026? Florida Governor Election Winner	Polymarket	65¢	$182k	in 3 days
Full Game: Over 55.5 points scored	Kalshi	99¢	$180k	in 45 h
Will AFC Ajax win on 2026-10-31? AFC Ajax vs. AZ	Polymarket	100¢	$178k	Oct 31
Northern Illinois vs. UNLV	Polymarket	10¢	$177k	Nov 1
Will Republicans win the Senate race in Alaska?: Republican party	Kalshi	30¢	$176k	Nov 3
Will Democrats hold 218 or more seats in the House after the 2026 midterms AND hold 49 or more seats in the Senate after the 2026 midterms?: Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate?	Kalshi	85¢	$174k	Feb 1
Boise St. wins by over 20.5 points	Kalshi	83¢	$171k	in 44 h
Boise St. wins by over 9.5 points	Kalshi	96¢	$170k	in 44 h
Spread: Texas Tech (-3.5) Arizona vs. Texas Tech	Polymarket	89¢	$166k	Oct 31
Will Oprah Winfrey win the 2028 Democratic presidential nomination? Democratic Presidential Nominee 2028	Polymarket	0¢	$165k	Nov 8
Spread: Trail Blazers (-6.5) Trail Blazers vs. Jazz	Polymarket	76¢	$165k	Oct 31
Oregon St. wins by over 3.5 points	Kalshi	2¢	$164k	in 45 h
Blue Jackets vs. Stars	Polymarket	13¢	$163k	Nov 1
Atlanta Dream vs. Golden State Valkyries: O/U 142.5 Atlanta Dream vs. Golden State Valkyries	Polymarket	6¢	$161k	Nov 1
Spread: Tottenham Hotspur FC (-1.5) Tottenham Hotspur FC vs. Crystal Palace FC - More Markets	Polymarket	100¢	$158k	Oct 31
South Carolina vs. Oklahoma	Polymarket	100¢	$158k	Oct 31
Will the Republicans win the Texas governor race in 2026? Texas Governor Election Winner	Polymarket	66¢	$158k	in 3 days
76ers vs. Hornets: O/U 211.5 76ers vs. Hornets	Polymarket	47¢	$158k	Oct 31
Full Game: Over 53.5 points scored	Kalshi	99¢	$158k	in 45 h
Will the Democratic Party hold more than 52 seats in the 120th Congress?: Above 52	Kalshi	48¢	$157k	Feb 1
Full Game: Over 65.5 points scored	Kalshi	99¢	$157k	in 44 h
Will Republicans win Maine, and lose Alaska, Iowa, Kansas, Michigan, Ohio, and Texas? Which Senate Swing States will Republicans win?	Polymarket	1.8¢	$157k	in 3 days
UNLV wins by over 20.5 points	Kalshi	18¢	$156k	in 45 h
Will Glenn Youngkin win the 2028 US Presidential Election? Presidential Election Winner 2028	Polymarket	0¢	$155k	Nov 8
Will Republicans win Alaska, Kansas, Ohio, and Texas, and lose Iowa, Maine, and Michigan? Which Senate Swing States will Republicans win?	Polymarket	0¢	$155k	in 3 days
Will MrBeast win the 2028 Democratic presidential nomination? Democratic Presidential Nominee 2028	Polymarket	0¢	$154k	Nov 8
Will the Democratic Party win the NC-13 House seat? NC-13 House Election Winner	Polymarket	42¢	$154k	in 3 days
Will Republicans win Alaska and Texas, and lose Iowa, Kansas, Maine, Michigan, and Ohio? Which Senate Swing States will Republicans win?	Polymarket	0¢	$154k	in 3 days
Will FC Porto win on 2026-10-31? FC Porto vs. Estoril Praia	Polymarket	100¢	$153k	Oct 31
Will the Democrats win the Florida governor race in 2026? Florida Governor Election Winner	Polymarket	35¢	$153k	in 3 days
Blackhawks vs. Bruins	Polymarket	93¢	$152k	Oct 31
Full Game: Over 62.5 points scored	Kalshi	99¢	$152k	in 44 h
Spread: Grizzlies (-9.5) Kings vs. Grizzlies	Polymarket	99¢	$151k	Nov 1
FC Porto vs. Estoril Praia: O/U 5.5 FC Porto vs. Estoril Praia - More Markets	Polymarket	0¢	$149k	Oct 31
Will over 5.5 goals be scored?: Over 5.5 goals scored	Kalshi	99¢	$149k	in 43 h
Minnesota vs. Indiana	Polymarket	31¢	$148k	Oct 31
FC Barcelona vs. Deportivo Alavés: O/U 4.5 FC Barcelona vs. Deportivo Alavés - More Markets	Polymarket	100¢	$148k	Oct 31
Will Republicans win the Senate race in Florida?: Ashley Moody	Kalshi	90¢	$148k	Nov 3
Will Republicans win the Senate race in Minnesota?: Michele Tafoya	Kalshi	9.4¢	$148k	Nov 3
US x Iran ceasefire continues through October 31? US-Iran ceasefire continues through...?	Polymarket	99¢	$147k	Oct 31

Prices and volumes are from my last read of each market; a dash means I haven't read it since tracking began. Kalshi volume counts contracts traded, each worth up to $1, as Kalshi's own site does.