Arbitrage Radar

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8 Active Trades
Billionaire one-time wealth tax on California ballot?

Will a one-time tax on billionaires ballot initiative in California pass? [In 2026]

+35.0%
Cost: $0.650
BUY [NO] on Polymarket ($0.24) AND BUY [YES] on Kalshi ($0.41) (SUBSET FREE-ROLL)
Polymarket Trade ↗
YES
$0.770
NO
$0.240
Kalshi Trade ↗
YES
$0.410
NO
$0.630
Catalyst Intel: The news indicates strong opposition from key political figures like Governor Newsom and San Jose Mayor Matt Mahan, despite support from other Democratic gubernatorial candidates. Budget experts also raise concerns that such a tax could worsen the state's structural budget deficit, rather than solve it. While there's a clear progressive desire for the tax and evidence of growing billionaire wealth, the opposition from current leadership and expert warnings about negative fiscal consequences suggest a significant hurdle for the ballot initiative's passage. The focus on the gubernatorial race and candidate stances also highlights the political battle ahead, with no clear consensus among leading figures.
Found: Apr 15, 2026 9:06 AM
Legal Reasoning: Market A resolves to 'Yes' if a specific ballot initiative is certified by June 25, 2026, for the November 3, 2026 California election. Market B resolves to 'Yes' if such an initiative 'passes' voter approval. For Market B to resolve to 'Yes', the initiative must first be certified and appear on the ballot. Market A imposes a stricter, earlier deadline (June 25, 2026) for this certification compared to the implicit requirements for Market B. If an initiative is certified after June 25, 2026, but still makes it onto the November 3, 2026 ballot and passes voter approval, Market B would resolve to 'Yes' while Market A would resolve to 'No'. This scenario indicates that Market A's conditions are stricter or have an earlier deadline for a prerequisite event compared to Market B's resolution condition, fitting the definition of A_SUBSET_OF_B, despite the parenthetical clause in the definition not being strictly met due to the possibility of certification by June 25 but failure to pass voter approval.
Found: Apr 15, 2026 9:06 AM
CA-11 House Election Winner

Who will win the CA-11 House election? [Scott Wiener]

+28.0%
Cost: $0.720
BUY [YES] on Polymarket ($0.46) AND BUY [NO] on Kalshi ($0.26) (SUBSET FREE-ROLL)
Polymarket Trade ↗
YES
$0.460
NO
$0.550
Kalshi Trade ↗
YES
$0.800
NO
$0.260
Catalyst Intel: The news snippets discuss special elections in New Jersey and Canada, and the California governor's race. There is no mention of a CA-11 House election, nor any information that would constitute a massive catalyst for that specific market.
Found: Apr 15, 2026 10:54 AM
Legal Reasoning: Market A is about who receives the most votes in the primary for CA-11 in 2026. Market B is about whether Scott Wiener wins the general election for CA-11 in 2026. For Scott Wiener to win the general election (Market B), he must first be the candidate who receives the most votes in the primary (a potential outcome of Market A). Therefore, Market B's outcome is a subset of Market A's potential outcomes, as Market A resolves earlier and to a different stage of the election process. Market A could resolve to Scott Wiener winning the primary, but he could still lose the general election, meaning Market B would resolve to No. However, if Market B resolves to Yes (Scott Wiener wins the general election), then he must have been the top vote-getter in the primary (Market A's resolution).
Found: Apr 15, 2026 10:54 AM
IPOs

Who will IPO before 2027? [OpenAI]

+16.0%
Cost: $0.840
BUY [YES] on Polymarket ($0.32) AND BUY [NO] on Kalshi ($0.52)
Polymarket Trade ↗
YES
$0.320
NO
$0.720
Kalshi Trade ↗
YES
$0.530
NO
$0.520
Catalyst Intel: The news snippets indicate several high-profile companies, including SpaceX and Kraken, are either planning or are rumored to be imminently pursuing IPOs. SpaceX is repeatedly mentioned as having an 'imminent' IPO, with some sources even discussing its potential valuation and historical performance of mega-IPOs. Kraken is explicitly stated to have 'filed for an IPO'. While Xpheno's IPO is planned for November 2027, the immediate mentions of SpaceX and Kraken suggest significant activity in the IPO market well before that date, creating a strong catalyst for the 'Who will IPO before 2027?' market.
Found: Apr 15, 2026 6:30 PM
Legal Reasoning: Both markets refer to an IPO by OpenAI. Market A's deadline is "by December 31, 2026, 11:59 PM ET", which is functionally identical to Market B's "before Jan 1, 2027". Market A's definition of an IPO ("first sale of stock...to the public on any recognized stock exchange") is a standard understanding of an IPO, and Market B's "confirms an IPO" would rely on the same event. Market A's negative conditions (merger, acquisition, cessation of existence) are implicit in Market B as well; if OpenAI doesn't exist, it can't IPO. There are no material differences in conditions or timeframes that would lead to divergent resolutions.
Found: Apr 15, 2026 6:30 PM
Newsom announces presidential run

Will Gavin Newsom announce a run for President of the United States before Jan 1, 2027? [Before Jan 1, 2027]

+10.0%
Cost: $0.900
BUY [YES] on Polymarket ($0.13) AND BUY [NO] on Kalshi ($0.77)
Polymarket Trade ↗
YES
$0.130
NO
$0.880
Kalshi Trade ↗
YES
$0.300
NO
$0.770
Catalyst Intel: The provided news articles focus entirely on the resignation of Eric Swalwell from Congress due to sexual assault allegations, the subsequent special election to fill his seat, and the ongoing California gubernatorial race. There is no mention of Gavin Newsom's presidential ambitions or any events that would directly influence a prediction market on his presidential run. The article 'With Gavin Newsom on the Way Out, Hollywood Works to Build Ties to His Successor' might initially seem relevant, but it refers to Newsom's eventual departure as governor, not a presidential run, and is likely a misinterpretation of his term limits or a future election for governor, not a presidential bid.
Found: Apr 15, 2026 2:24 AM
Legal Reasoning: Both markets are asking the same question: will the individual announce a run for President in the 2028 election by December 31, 2026 (Market A) or before January 1, 2027 (Market B). These timeframes are identical. Market A specifies 'officially announces' and Market B specifies 'has announced', both implying a public declaration. Market B explicitly includes 'running for the nomination of any political party', which is implicitly covered by Market A's 'running for U.S. President'.
Found: Apr 15, 2026 2:24 AM
Poilievre out as leader

Will Pierre Poilievre resign as the conservative party leader before Jan 1, 2027? [Before 2027]

+9.0%
Cost: $0.910
BUY [YES] on Polymarket ($0.27) AND BUY [NO] on Kalshi ($0.64)
Polymarket Trade ↗
YES
$0.270
NO
$0.780
Kalshi Trade ↗
YES
$0.370
NO
$0.640
Catalyst Intel: The news indicates that Pierre Poilievre has explicitly stated he has no plans to resign, despite recent byelection losses and the Liberal party securing a majority. While there are 'leadership questions' and 'resignation rumors,' the dominant narrative is his commitment to stay and lead the party into the next election. Some articles even suggest the Liberal majority could create favorable conditions for him to mount his next campaign. This strong declaration against resignation, coupled with internal party defense, suggests a low probability of him resigning before Jan 1, 2027.
Found: Apr 15, 2026 2:30 PM
Legal Reasoning: Both markets define the event (Pierre Poilievre resigning/leaving leadership or announcing such) and the deadline (by December 31, 2026 / before Jan 1, 2027) identically. Both also specify that an announcement before the deadline is sufficient for a "Yes" resolution, regardless of the effective date. The conditions and timeframes are virtually identical.
Found: Apr 15, 2026 2:30 PM
OpenAI IPO timing.

When will OpenAI IPO? [Before Jan 1, 2027]

+8.0%
Cost: $0.920
BUY [YES] on Polymarket ($0.39) AND BUY [NO] on Kalshi ($0.53)
Polymarket Trade ↗
YES
$0.390
NO
$0.620
Kalshi Trade ↗
YES
$0.490
NO
$0.530
Catalyst Intel: Multiple news snippets indicate increasing skepticism from investors regarding OpenAI's $852 billion valuation, concerns about its strategic shift to enterprise clients, intense competition from Anthropic (which is reportedly winning market share and has a lower valuation making it a 'bargain'), and internal issues like revised product roadmaps and accusations of overstating revenue. There's also a mention of OpenAI potentially reducing future spending in preparation for an IPO, which could signal a more cautious approach or a delay. While an IPO is still expected as early as Q4 2026, these factors suggest a negative sentiment and potential downward pressure on its pre-IPO valuation or a delay in the IPO itself.
Found: Apr 15, 2026 4:06 PM
Legal Reasoning: Both markets are tracking the same event: OpenAI completing an Initial Public Offering (IPO) before January 1, 2027. Market A's definition of an IPO and resolution sources align perfectly with the natural interpretation of Market B's conditions. The specific clause in Market A regarding acquisition by an already public company explicitly states a scenario that would implicitly lead to a 'No' resolution in Market B, as OpenAI itself would not have performed an IPO. Therefore, the conditions and outcomes are virtually identical.
Found: Apr 15, 2026 4:06 PM
Filibuster change this year?

Filibuster weakened before 2027 [Before 2027]

+8.0%
Cost: $0.920
BUY [NO] on Polymarket ($0.75) AND BUY [YES] on Kalshi ($0.17) (SUBSET FREE-ROLL)
Polymarket Trade ↗
YES
$0.400
NO
$0.750
Kalshi Trade ↗
YES
$0.170
NO
$0.840
Catalyst Intel: Multiple news articles indicate significant pressure from President Trump and some Republican senators (e.g., Tuberville, Scott) to eliminate or weaken the filibuster, specifically to pass legislation like the 'Save America Act' or fund ICE, and to prevent Democrats from doing so if they regain the majority. While some Republicans are reluctant, the consistent and strong push from a former President who may run again, combined with the mention of using reconciliation to circumvent the filibuster, suggests a heightened probability of the filibuster being weakened before 2027. The 2026 elections are also mentioned as a key timeframe, implying that the political landscape leading up to 2027 will be highly relevant to this debate.
Found: Apr 15, 2026 10:24 AM
Legal Reasoning: Market A requires a specific event: a cloture motion passing with fewer than three-fifths of Senators on a legislative matter. For such a motion to pass, the filibuster threshold must first have been lowered for the legislative process. Market B is broader, resolving to "Yes" if the filibuster threshold is lowered in any capacity (e.g., for legislative matters, confirmations, or both) and does not require an instance of a cloture motion passing. If Market A resolves "Yes," it inherently means the filibuster threshold was lowered, making Market B also resolve "Yes." However, Market B could resolve "Yes" without Market A resolving "Yes" if: 1) the threshold is lowered only for confirmations (which Market A explicitly excludes), or 2) the threshold is lowered for legislative matters, but no actual cloture motion passes under the new threshold before the deadline. Therefore, Market A's conditions are stricter than Market B's.
Found: Apr 15, 2026 10:24 AM
Michigan Governor

Will the Republican party win the governorship in Michigan [Republican party]

+6.0%
Cost: $0.940
BUY [NO] on Polymarket ($0.8) AND BUY [YES] on Kalshi ($0.14)
Polymarket Trade ↗
YES
$0.230
NO
$0.800
Kalshi Trade ↗
YES
$0.140
NO
$0.870
Catalyst Intel: The provided news snippets primarily discuss the California gubernatorial race and the 2026 US Congress elections, with a brief mention of Vivek Ramaswamy's potential Ohio gubernatorial bid. While Michigan is mentioned as a battleground state for the 2026 Congressional elections, there is no specific news or information about the Michigan governorship race itself, nor any 'massive catalyst' that would significantly impact the Republican party's chances of winning it. The news about legislative leaders in Lansing is general and doesn't indicate a major shift in the gubernatorial landscape.
Found: Apr 15, 2026 6:12 PM
Legal Reasoning: Both markets resolve based on the outcome of the 2026 Michigan gubernatorial election, specifically whether the official Republican nominee wins. Market A explicitly defines a representative as the nominee. Market B's condition 'representative of the Republican party is inaugurated' assumes the official nominee wins and is subsequently inaugurated, which is a direct and guaranteed consequence of winning the election. The fundamental event determining the outcome for the 'Republican party' is identical in both cases.
Found: Apr 15, 2026 6:12 PM