Infiniti Intelligence Hourly Briefing — Oct 9, 2026 · 1:54 PM ET

Prediction platforms’ expansion into campaign decisions and speech content is raising concerns about trading on advance knowledge ahead of the midterms, according to CNN. An analysis by the nonpartisan Anti-Corruption Data Collective, obtained first by CNN, found an average of 44 granular markets per race beyond election outcomes, with more than $20 million in trading volume across highly specific midterm markets.

Campaign decisions become tradable events

Kalshi and Polymarket both offer markets covering every Senate, House and governor’s race this year, CNN reported. Additional contracts cover candidate withdrawals, endorsements, President Donald Trump’s campaign locations, words spoken at rallies and debates, whether debates take place, and states redrawing House districts. CNN highlighted questions involving Vice President JD Vance’s Friday campaigning in Ohio, a Texas Senate debate by Thursday and further endorsements from former President Barack Obama, who had issued a series of endorsements that week.

Anti-Corruption Data Collective co-director Michael Hornsby told CNN that candidates, campaign employees and their associates can know these outcomes beforehand, creating incentives to exploit privileged information. The regulatory backdrop remains supportive: a federal appeals court rejected the Biden administration’s attempt to ban election-outcome markets in October 2024, while the Trump administration is completing federal rules that would permit their continued growth.

Enforcement and a flagged withdrawal market

Kalshi has suspended at least six 2026 candidates this year for trading on their own races against platform rules, according to CNN. This summer, Trump’s White House teleprompter operator settled a federal civil investigation into insider trading on Kalshi speech-related markets by paying a $65,000 fine. Both platforms say they prohibit insider trading; Kalshi enforcement chief Bobby DeNault said narrowly defined information can make some violations easier to establish, while Polymarket said it employs advanced surveillance, hired a former FBI official to lead investigations and routinely refers cases to the Justice Department.

The watchdog also identified dozens of potentially connected Kalshi trades anticipating Graham Platner’s withdrawal from the Maine Senate race. Platner secured the Democratic nomination in June; a few weeks later, an ex-girlfriend publicly accused him of rape, which he denied. His party support deteriorated and he withdrew within days. Researchers found trades placed the night before, and immediately before, the accusation became public—but the patterns do not establish insider trading and could be unrelated. A Democratic operative told CNN that rumors of a damaging story had circulated at least one week earlier.

On Tuesday, Kalshi’s top lobbyist, John Bivona, told reporters that customer screening blocks candidates, campaign staffers, party officials, vendors, pollsters and election workers from markets whose outcomes they could influence. He said Kalshi reviews every trade for suspicious timing and coordination and applies rules beyond federal insider-trading requirements. Federal law criminalizes trading on confidential, non-public information where a duty of confidentiality exists, and can also cover recipients of tips from people bound by that duty. CNN disclosed its Kalshi partnership, its prohibition on editorial employees trading on prediction platforms and its policy against using data from markets controlled by a single person.

What it means for prediction markets

• Contract design matters: Markets on speeches, endorsements and withdrawals expose participants to advance-information risks different from those in election-result markets.
• Platform rules and federal law are distinct: Kalshi’s restrictions on participation extend beyond the legal framework described in CNN’s reporting.
• Unusual trades are not proof: The Platner-market findings flag timing and possible coordination, not an established violation.
• Growth brings enforcement scrutiny: The reported 44 granular markets per race and more than $20 million in volume put surveillance and insider restrictions at the center of the midterm-market debate.

Rangers deal extends hockey’s lead

Polymarket has secured a Rangers partnership two weeks after Kalshi’s agreement with the Blackhawks became the first formal tie-up between a prediction-market platform and a North American professional sports team, according to Front Office Sports reporting republished by GambleRss. Publicly traded Madison Square Garden Sports announced the agreement in a press release; it covers the Rangers but not the Knicks, which the company also owns.

The agreement gives Polymarket promotional exposure during Rangers games at Madison Square Garden, including LED displays and on-ice activities. MSG Sports COO Jamaal Lesane praised the operator’s reliability and innovation, while Polymarket founder and CEO Shayne Coplan described the partnership as a way to introduce more fans to interactive, real-time markets.

The Knicks’ absence does not, by itself, establish a broader policy divide within MSG Sports. The Rangers signed a separate agreement with Pellera Technologies earlier this month, and the Knicks partnered with DoorDash in 2022. Both teams were included when MSG Sports extended its Anheuser-Busch partnership on Wednesday. The Knicks and Polymarket offered no comment beyond the release, according to the report.

League acceptance remains uneven

The NHL remains the only major sports league to embrace prediction markets, with both Polymarket and Kalshi serving as official partners. Commissioner Gary Bettman has framed those relationships as a means of exercising oversight, saying the league can ask the platforms to remove contracts it considers inappropriate. The NFL, MLB and NBA have not followed, although CNBC and CNN are incorporating prediction-market data. In May, the NBA’s assistant general counsel asked the Commodity Futures Trading Commission (CFTC) for rules addressing integrity risks.

The regulatory distinction remains central to the debate: traditional sports betting operates under state-by-state regulation, while prediction-market platforms fall under federal CFTC oversight. Scrutiny also extends beyond sports. According to the report, a newly created anonymous account earned more than $400,000 in less than 24 hours this week from markets that included whether Venezuelan president Nicolás Maduro would leave power by the end of this month. The timing prompted one New York lawmaker to accelerate federal legislation intended to prevent insider trading on the platforms.

Polymarket’s broader expansion

Polymarket’s return to the U.S. under President Donald Trump followed a prohibition lasting nearly four years under a settlement with the Biden administration. Donald Trump Jr. is an investor through his firm, 1789 Capital. Separately, in October, New York Stock Exchange operator Intercontinental Exchange agreed to invest up to $2 billion in Polymarket at a $9 billion valuation, according to the report.

What it means for prediction markets

• Team-level adoption is expanding within hockey. The Rangers agreement follows Kalshi’s Blackhawks deal, but does not demonstrate acceptance by the NBA or the Knicks.
• Contract oversight is part of the NHL’s rationale. Bettman’s stated ability to seek contract removals makes market selection an important element of the league’s platform relationships.
• Commercial growth and integrity scrutiny are moving together. New promotional access and investment commitments coexist with concerns about sports contracts and potentially informed trading outside sports.