Wall Street Rivalry: Kalshi Index Contracts Threaten Traditional Brokerages

The boundaries between financial markets and regulated betting are increasingly blurred. Economist Rajiv Sethi from Columbia University warns that Kalshi’s leveraged index contracts represent a significant threat to conventional brokerage accounts. While Wall Street establishes are already taking Kalshi to court, the current legal resistance primarily focuses on single-stock perpetuals. However, Sethi is convinced that the real impact lies in products tied to broad stock market indexes. These could tempt investors to move their savings away from traditional institutions like Vanguard or Fidelity toward more innovative, yet riskier, prediction markets.

Volatility in leverage is particularly noteworthy. On November 8, 2026, a screenshot from Kalshi showed buying power for the US Large Cap perpetual at 36.4 times the initial capital. Just a few days later, on November 12, this figure dropped to 14.6 times. Such massive fluctuations highlight the enormous risk involved. When investors operate with 36x leverage, a market downturn of less than three percent is enough to wipe out the entire invested capital. Positions are liquidated immediately in such cases, resulting in a total loss for retail savers. Sethi emphasizes that people are often too focused on traditional sports betting and overlook how significantly savings behavior could change through these new financial derivatives.

Numbers and facts

The dimensions of this new market are substantial. Kalshi listed more than 50 single-stock perpetual contracts within just two days. In a filing dated November 10, the Capital Markets Alliance Association stated that reported 24-hour notional trading volume reached approximately $375 million. Specifically, the US Tech 100 index saw volumes of $183 million on November 12, while the US Large Cap contract recorded $35.3 million. Unlike conventional futures, these contracts have no expiration date. This makes them attractive to users who want to hold long-term positions without paying rollover fees or dealing with complex options.

"If people start funneling retirement savings into perps on stocks and indexes, Kalshi (and maybe Polymarket US) will be competing with Fidelity and Vanguard, not DraftKings." - Rajiv Sethi, Professor of Economics at Barnard College, Columbia University

This development has caught the attention of regulatory bodies. The Commodity Futures Trading Commission (CFTC) faces a lawsuit from the Capital Markets Alliance, whose members include heavyweights like Citadel Securities and Cboe Global Markets. They argue that the products should be legally classified as security-based swaps and that the CFTC exceeded its authority in approving them. Although U.S. District Judge Valerie Caproni denied an emergency request for a temporary restraining order on November 3, she acknowledged that the lawsuit is likely to succeed on its merits.

Background

The political environment in Washington plays a crucial role in the future of these markets. According to Sethi, the interpretation of rules depends heavily on who is in power. Current CFTC Chairman Michael Selig defended the introduction of single-stock contracts, stating on November 3 that regulated U.S. markets offer better investor protections than offshore alternatives. Nevertheless, the future, especially regarding sports betting on prediction markets, remains uncertain as state gambling laws and federal regulations collide. It is a showdown between modern FinTech and the established banking industry, with billions in retail order flow at stake.

Why it matters for German players

For players and investors in Germany, this U.S. debate serves as an important guide, as local regulation under the Interstate Treaty on Gambling 2021 (GlüStV 2021) sets much stricter limits. In Germany, the separation between financial products and gambling is clearly defined. While platforms like Kalshi in the U.S. attempt to blur this line, the Joint Gambling Authority of the States (GGL) ensures a strict framework for online betting. Deposits in Germany are generally limited to 1,000 euros per month via the LUGAS system. Leveraged products like those offered by Kalshi with a 36.4x factor would be completely unthinkable in the German gambling sector due to stake limits of usually 1 euro per spin or strict betting requirements. German users should ensure they only play with providers on the GGL whitelist to remain legally protected. Protection against total loss, as described by Sethi regarding U.S. index bets, is a top priority in Germany through GGL oversight.

What it means for GGL-licensed casinos

Licensed German providers must monitor this trend as competition for consumers' discretionary income becomes more global. If financial products integrate gamified elements and extremely high win potential (along with high risks), potential customers might drift away from classic slot or sports betting offerings. However, GGL-licensed casinos stand out with safety and addiction prevention. While Kalshi poses the risk of "liquidation" and immediate capital loss within minutes, the German market offers a controlled environment through deposit limits and the OASIS cross-provider ban system. The focus on transparency and state supervision remains the strongest argument against high-risk derivative betting from overseas.