The Dawn of the Institutional Era for Prediction Markets: Bernstein Report and the Significance of the First Historic Block Trade

On May 4, 2026, prediction markets officially entered the realm of institutional finance, moving beyond a market driven primarily by the interests of retail investors. Simultaneously with the completion of the first-ever institutional block trade, investment bank Bernstein released a groundbreaking report projecting the market to grow to $1 trillion by 2030. This suggests that decentralized prediction infrastructure has entered a new phase, securing high levels of financial legitimacy.

Prediction markets are now moving beyond the limitations of fragmented traditional betting sites and entering a new era of decentralized financial forecasting where institutional capital is flowing in.

The key milestone of this shift is the first institutional block trade executed on the Kalshi exchange on May 4, 2026. Participated in by Greenlight Commodities and Jump Trading, the transaction was led by Montauk Capital. This trade is evaluated as a 'proof of concept' case demonstrating that prediction markets have the liquidity and infrastructure to accommodate large-scale capital.

Historic Milestone: Completion of the First Institutional Block Trade

Looking at the mechanism of the block trade, participants utilized Kalshi's special-purpose event contracts linked to environmental commodity outcomes instead of traditional carbon credit futures trading. This shows that institutional investors are beginning to choose the flexible contract structures of prediction markets to hedge complex economic risks. Bernstein analyzed that these customized contracts and changes in the U.S. regulatory environment are reshaping a market that was previously retail-centric.

• The number of applications for Designated Contract Market (DCM) registration has more than doubled over the past year, strengthening the institutional foundation.
• The availability of dedicated block trade facilities that enable large-scale fund execution has expanded, improving accessibility for institutions.
• The variety of listed event contracts exploded from 131 in 2021 to approximately 1,600 in 2025.
• As the regulatory frameworks of the U.S. CFTC and SEC mature, legal uncertainty for institutional investors is being resolved.

Bernstein analyst Gautam Chhugani predicted that trading volume in 2026 would surge by 370% year-over-year to reach $240 billion. Behind this growth lies a compound annual growth rate (CAGR) of approximately 80% between 2025 and 2030. The table below shows the specific market growth path presented by Bernstein.

Qualitative changes in the market are also notable. The share of sports betting, which currently accounts for about 62% of volume on Polymarket and Kalshi, is expected to moderate to around 31% by 2030. Instead, institutional investors are focusing on contracts that allow for practical economic hedging, such as economic indicators, commodity price fluctuations, and policy decisions. This trend supports the evolution of prediction markets from simple gambling into sophisticated financial tools.

Growing Pains: The First Case of Insider Trading and the Need for Oversight

However, side effects of rapid growth are also appearing. In early 2026, approximately $500 million in trades occurred in Polymarket contracts related to military operations by the U.S. and its allies, during which allegations of insider trading were raised. Blockchain analysis revealed clusters of wallets executing highly accurate bets just before major events, highlighting the need for strengthened market surveillance systems.

Despite these legal and ethical challenges, the stance of regulatory authorities is gradually becoming clearer. As the number of exchanges holding Designated Contract Market (DCM) licenses increases and transparent blockchain-based transaction tracking becomes possible, an oversight system distinct from the opaque betting markets of the past is being established. This is contributing to an environment where institutional investors can enter with confidence.

In conclusion, May 2026 will be recorded as the period when prediction markets firmly established themselves as an institutional asset class. As Bernstein's analysis suggests, this market is no longer the exclusive domain of retail investors but is functioning as a 'new financial primitive' providing unique hedging tools for institutional capital. As infrastructure matures and regulatory frameworks are established more rapidly, prediction markets are expected to emerge as a core forecasting tool for the global financial system.