---
title: "Prediction Markets Kalshi and Polymarket Face Midterms Test as Volume Surges"
description: "Combined platform monthly volume topped $50 billion in July as regulators ease scrutiny and institutional researchers examine market signaling."
url: https://basisdesk.news/news/kalshi-polymarket-midterms-test-trading-volume-surge
published: 2026-10-20T16:31:49.707Z
modified: 2026-10-20T16:31:49.707Z
section: Regulation & Policy
author: Basis Desk Newsroom (AI-generated, source-verified)
sentiment: neutral
tickers: [BTC]
tags: [prediction-markets, kalshi, polymarket, cftc, midterms]
license: Quote with attribution to Basis Desk (basisdesk.news). Not financial advice.
---

# Prediction Markets Kalshi and Polymarket Face Midterms Test as Volume Surges

Combined platform monthly volume topped $50 billion in July as regulators ease scrutiny and institutional researchers examine market signaling.

## At a glance

- **What happened:** Kalshi and Polymarket entered the midterm election season with monthly volume exceeding $50 billion following CFTC regulatory revisions.
- **Why it matters:** The midterms serve as the primary liquidity and accuracy benchmark for regulated event contracts competing against traditional polling models.
- **Who is affected:** Prediction market exchanges, political forecasters, campaign analysts, and event contract traders.
- **What's next:** The NEXTPredict summit convenes on Oct. 22–23 ahead of election voting on Nov. 3.
- **Status:** proposed
- **Primary source:** [The Midterms Are the First Real Test of Whether Markets Beat Pollsters](https://decrypt.co/380966/the-midterms-are-the-first-real-test-of-whether-markets-beat-pollsters) — decrypt.co

## Key points

- Combined monthly trading volume across Kalshi and Polymarket reached $53 billion in July, rising from $26 billion in May.
- The CFTC withdrew its gaming classification proposal in February and introduced a June framework treating election markets as non-gaming.
- Data from the Anti-Corruption Data Collective found a $3,500 transaction moves 97% of midterm election contracts by at least five cents.

## Editorial remark

- **Context:** The CFTC previously barred Kalshi from offering contracts on congressional control, but regulatory headwinds eased following litigation and a formal rule revision in 2026.
- **Impact:** Traders and institutional allocators gain regulated exposure to political outcome hedging, while pollsters face direct performance comparisons against market pricing.
- **Watch:** The NEXTPredict summit in New York on Oct. 22–23, followed by election results and market settlement on Nov. 3.

Prediction market operators Kalshi and Polymarket enter the November midterm elections operating at significantly larger scales than in previous cycles, with combined monthly trading volume rising from $26 billion in May to $53 billion in July [1]. Political contracts comprise a modest portion of total activity, averaging roughly $2 billion monthly on Polymarket and under $300 million on Kalshi, according to an analysis by the Pew Research Center [1]. Over $30 million had been traded on House and Senate control by July [1].

The regulatory climate has shifted notably since 2024, when federal courts opened U.S. election contract trading shortly before the presidential vote [1]. The Commodity Futures Trading Commission (CFTC) previously sought to block Kalshi's congressional control contracts by classifying them as unlawful gaming [1]. However, the regulator withdrew that proposed restriction in February and published a structured framework on June 10 that explicitly excludes election contracts from the gaming definition, citing the forecasting utility of crowd-sourced market pricing, according to Congressional Research Service findings [1].

## Market Depth and Institutional Scrutiny

Despite growing volumes, market depth remains uneven across specific races [1]. A study by the Anti-Corruption Data Collective revealed that a $3,500 position—equivalent to the individual federal campaign contribution limit—moves 97% of midterm-related contracts by five cents or more [1]. Kalshi spokesperson Dani Lever disputed concerns over structural distortion, stating that mispriced contracts in liquid environments present immediate arbitrage opportunities [1].

Institutional researchers are examining whether order-flow signals outperform conventional polling methodologies [1]. Morgan Stanley's Counterpoint Global examined more than 72 million transactions on Kalshi, concluding that contract pricing closely tracked final outcomes [1]. Media analysts and market operators will assess forecasting accuracy following the Nov. 3 vote [1]. At the time of writing, broader digital asset markets traded steadily, with $BTC changing hands at $82,387.

## Sources

1. [The Midterms Are the First Real Test of Whether Markets Beat Pollsters](https://decrypt.co/380966/the-midterms-are-the-first-real-test-of-whether-markets-beat-pollsters) — decrypt.co, 2026-10-20

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Basis Desk Newsroom · AI-generated, source-verified · https://basisdesk.news/about/how-we-use-ai