85% Liquidity Collapse: Why Prediction Markets and Perp DEXs Fail to Cross Domains

Woofun AI reports that the strategic boundary between prediction markets and perpetual decentralized exchanges (Perp DEXs) has been aggressively tested by industry leaders over the past six months, with mixed results. The core narrative of this period, as analyzed by Asher for Planet Daily, centers on the mutual penetration of these two dominant trading sectors. In April, Polymarket announced its intent to launch Perp products covering cryptocurrencies, U.S. stocks, and commodities.

By the end of May, Kalshi officially introduced cryptocurrency perpetual contracts regulated by the CFTC. Conversely, Hyperliquid, the established leader in Perp DEXs, entered the prediction market space through HIP-4, aiming to leverage its mature order book, account system, and liquidity advantages into real-world event trading. The fundamental hypothesis was that each platform could transplant its core user base and trading scenarios into the other’s domain.

However, the empirical data suggests that user habits and liquidity accumulated in original sectors do not naturally migrate as product boundaries expand, revealing a significant structural friction in cross-domain expansion.

The strategic timeline from April to May highlights the aggressive posturing of these entities. Polymarket’s April announcement signaled a move beyond binary outcomes into leveraged derivatives, targeting assets like cryptocurrencies, U.S. stocks, and commodities. Simultaneously, Kalshi secured regulatory clarity by launching CFTC-regulated cryptocurrency perpetual contracts by the end of May. On the Perp side, Hyperliquid’s HIP-4 initiative was designed to integrate outcome-based markets into its existing infrastructure.

The goal was to utilize its robust order book and account system to capture value from real-world events. This period marked a distinct shift from vertical specialization to horizontal expansion, with each player attempting to replicate its success in a fundamentally different trading paradigm. The underlying assumption was that liquidity and user attention were fungible across asset classes and contract types, a premise that subsequent data would challenge.

A critical variable is the mismatch in user bases and initial results. Prediction markets, such as those operated by Polymarket and Kalshi, attract users interested in sports, esports, politics, and trending events. These participants are often driven by information asymmetry and event-specific narratives rather than continuous price action. In contrast, Hyperliquid has cultivated a community of crypto-native traders who prefer high-frequency, leveraged trading.

These users are accustomed to rapid execution, deep order books, and continuous market hours. The attempt to bridge these two worlds required not just product integration but a fundamental shift in user behavior. The data indicates that while platforms could technically offer new products, the liquidity and engagement patterns did not transfer seamlessly. Product boundaries remained rigid because the underlying motivations for trading—event resolution versus price speculation—are structurally distinct.

Hyperliquid’s HIP-4 launch provides a clear case study in this dynamic. On May 2, Hyperliquid launched HIP-4 Outcome Markets on its mainnet, integrating outcome-based markets into its on-chain trading system. The initial offering consisted of BTC intraday binary outcome contracts, which generated $6.15 million in trading volume on the first day. This figure far exceeded the volume of similar prediction products from Kalshi and Polymarket at the time.

Furthermore, over 54,000 trades were completed that day, involving more than 3,000 participants. The momentum was further amplified by the World Cup. At the beginning of June, there were only dozens of active HIP-4 markets, but this number quickly rose to over 100, peaking at more than 120. Trading volume surged accordingly, reaching nearly $30 million in a single day on June 27, with levels remaining in the tens of millions the following day. As more sports events, macro data, and crypto price-related events were added, HIP-4 evolved from a niche BTC contract platform into a more comprehensive event trading venue.

Woofun AI data shows, However, the surge in market numbers did not translate into sustained trading demand. As the World Cup progressed, the number of active HIP-4 markets began a steady decline, falling from a peak of 125 to around 50, and then dropping to just over 20 in mid-July. Recently, the count has fallen below 20, representing a decline of over 85% from the peak. Trading volume also weakened, returning to the millions of dollars range on most days and occasionally dropping below $10 million.

The deeper driver is the fundamentally different liquidity structure between Perp and event contracts. Perpetual contract trading revolves around core assets like BTC and ETH, allowing market makers, capital, and traders to remain concentrated in the same markets. Event contracts, however, are settled as competitions end or data is released, meaning new markets require the reaccumulation of liquidity and trading interest. Hyperliquid can reuse its matching system, account, and funding infrastructure, but it cannot directly transfer the liquidity and trading frequency established in Perp to HIP-4.

Polymarket’s entry into perpetual contracts followed a similar pattern of early hype followed by reality checks. In April, Polymarket announced its Perp products, and by July, it began offering them to more users, supporting up to 20x leverage. Access remains restricted, requiring an invitation code or placement on a waitlist. The products cover cryptocurrencies such as BTC, ETH, and SOL, and have expanded to include some stocks and commodities. In the early days after launch, 24-hour trading volume reached around $48 million.

However, this level was not sustained. By late July, daily trading volume had dropped to about $18.2 million, with an open interest (OI) of around $26.4 million. The OI for core trading pairs like BTC and ETH was also only in the millions of dollars range. Compared to the initial phase, trading activity on Polymarket Perps has clearly cooled down. Since Polymarket Perps is still in its early stages and requires an invitation code to trade, direct comparison with established Perp platforms is nuanced. Nevertheless, the gap in scale is significant.

During the same period, Hyperliquid’s OI was around $7.7 billion, with 24-hour trading volume of about $1.58 billion. Polymarket Perps’ OI was only around $26.4 million, approximately 0.3% of Hyperliquid’s figure. Its daily trading volume was also only around 1% of Hyperliquid’s. Currently, trading volume on Polymarket Perps appears to reflect early users testing a new product, without yet forming stable trading habits or sustained interest. Polymarket’s user and brand advantages in prediction markets have not successfully transferred to the Perp sector.

Kalshi’s perpetual contracts experienced a rapid rise and fall, highlighting the volatility of cross-domain attempts. By the end of May, Kalshi officially launched cryptocurrency perpetual contracts regulated by the CFTC, initially covering assets like BTC, ETH, SOL, and XRP. By July 9, about six weeks later, Kalshi Perps had accumulated trading volume of $16.1 billion. Unlike the rapid growth in the early days, trading enthusiasm for Kalshi Perps has clearly cooled down. Data from Loris Tools shows that the Perps section on Kalshi still saw daily trading volume of $448 million on July 20, but it dropped to around $80 million in the past two days, a collapse of over 80% in just a few days.

Meanwhile, Hyperliquid’s daily Perp trading volume remains in the billion-dollar range. Even using Kalshi’s recent high of $448 million on July 20 as a benchmark, its trading scale is significantly lower than Hyperliquid’s. When Kalshi’s daily trading volume dropped to around $80 million, the gap widened further. The difference in open interest is even more striking. The current OI for the Perps section on Kalshi is only in the tens of millions of dollars, while Hyperliquid’s is around $7.5 billion. The $16.1 billion in cumulative trading volume six weeks after launch indicates a solid cold start, but the recent rapid decline in trading volume and low OI mean it is far from competing with mainstream Perp platforms.

Kalshi’s regulatory edge provides a unique advantage, but it does not guarantee trader retention. Its 'U.S.-compliant access' remains its most notable differentiating factor, addressing the question of whether U.S. users can trade Perps.

However, this does not explain why professional Perp traders would choose to stay on Kalshi long-term. The platform faces a cold start challenge in attracting and retaining the high-frequency, leveraged traders that dominate the Perp space. Mainstream Perp platforms have established deep liquidity and sophisticated tooling that cater to these users. Kalshi’s strength lies in its regulatory clarity and access to U.S. users, but this advantage is insufficient to overcome the structural differences in trading behavior and liquidity provision. The data suggests that while regulatory compliance opens doors, it does not automatically generate the sustained trading volume and depth required to compete in the Perp market.

The conclusion drawn from these cross-domain attempts is that core strengths outweigh expansion efforts. The goal of becoming an 'everything exchange' has proven elusive for Hyperliquid, Polymarket, and Kalshi. What is truly difficult to replicate are the user habits and liquidity accumulated over time in their original sectors. Hyperliquid’s core users are accustomed to high-frequency, leveraged, and on-chain derivatives trading.

Polymarket and Kalshi’s users tend to make decisions based on sports, politics, and trending events. Platforms can quickly add new categories, but it is hard to change users’ existing trading habits. For Hyperliquid, deepening Perp and on-chain asset trading may be more important than proving it can trade anything. For Polymarket and Kalshi, what is truly scarce are event offerings, user loyalty, and prediction market liquidity.

Cross-border expansion can bring new growth opportunities, but if new categories fail to develop independent demand, they may divert resources from the platform’s core strengths. Ultimately, in the race to become an 'Everything Exchange,' it may not matter as much how many categories a platform covers, but rather its ability to continuously build up users, liquidity, and market depth in its core areas.

For platforms that already have clear advantages, strengthening their core offerings might be more important than constantly expanding their scope.