Woofun AI reports that a significant pricing dislocation emerged in the SK Hynix equity market following its Nasdaq listing, with American Depositary Receipts (SKHY) trading at a massive premium against the underlying Korean shares (SKHX). This anomaly was attributed to structural arbitrage blockages and intense demand from U.S. institutional investors, creating a unique trading environment. During this period of volatility, TradeXYZ, the builder of HIP-3 on Hyperliquid, launched perpetual futures markets for both SKHX and SKHY.

These derivatives allowed traders to exploit the price gaps using USDC collateral, effectively bypassing traditional cross-border settlement frictions, albeit with exposure to funding rate risks. The scenario involved key entities including Eren from Four Pillars, AididiaoJP from Foresight News, and Bank of America, which issues the ADRs representing foreign shares for U.S. markets like Nasdaq. Each SKHY unit represents one-tenth of an underlying SKHX share, creating a direct but mechanically complex link between the two instruments.

The scale of the issuance set new records for foreign companies entering the U.S. market. On July 9, SK Hynix sold 177.9 million ADRs at a price of $149 per share, raising a total of $26.5 billion. This figure surpassed the previous record held by Alibaba, which raised $21.8 billion in 2014, marking the largest ADR issuance by a foreign entity to date. The subscription books experienced a 7 times oversubscription rate, indicating overwhelming investor interest. When trading commenced on Nasdaq on July 10, the opening price was set at $170, immediately establishing a premium over the issue price. This initial pricing action set the stage for the subsequent divergence between the ADRs and the underlying stock, as the market struggled to absorb the supply-demand imbalance in the early trading sessions.

Price divergence accelerated sharply on July 13, highlighting the disconnect between the two markets. The ADR premium, which had started around 3% relative to the issue price, expanded to 25.6% during the session. In contrast, the underlying shares in South Korea plummeted by 15.4%, reflecting broader regional sentiment. The KOSPI index also dropped by over 8% during trading, triggering a circuit breaker mechanism due to the severity of the decline. Despite this regional sell-off, the ADRs fell by only 9.3%, demonstrating the resilience of U.S. investor demand and the isolation of the ADR market from immediate spot corrections in Korea. This decoupling underscored the inefficiency in price discovery between the two venues, as arbitrageurs were unable to capitalize on the widening spread.

The premium reached its peak on July 14, before beginning to narrow the following day. ADRs surged by 27%, closing at $193.92, which pushed the premium relative to the original shares to a staggering 51%. This extreme valuation gap represented a significant arbitrage opportunity that remained unexploited due to structural constraints. On July 15, the ADRs retreated by 9%, closing at $176.46, while the underlying shares rallied by 8.8%. Consequently, the ADR premium narrowed from 51% to 30.7%. This fluctuation illustrated the volatility inherent in the pre-arbitrage phase, where price movements were driven by speculative positioning rather than fundamental convergence. The rapid expansion and contraction of the premium highlighted the temporary nature of the dislocation, pending the resolution of the arbitrage blockage.

The primary driver of the premium was the closure of the arbitrage channel, which prevented market forces from equalizing prices. In an efficient market, institutions would buy the cheaper underlying shares, convert them into ADRs, and sell the ADRs to increase supply and eliminate the gap.

However, this mechanism was disabled because the ADRs were created by issuing 17.79 million new shares to the depositary bank, Citibank, rather than depositing existing shares. These original shares were scheduled to be listed separately on the Korean exchange on July 29. Korean securities depositary institutions stated that applications to convert between original shares and ADRs could only be processed after that date.

Furthermore, the issued ADRs accounted for less than 3% of SK Hynix’s total shares, meaning strong demand from U.S. institutions met with limited supply, thus widening the price gap significantly.

Woofun AI data shows that in response to these market conditions, TradeXYZ launched perpetual futures markets for both SKHX and SKHY on the HIP-3 protocol built on Hyperliquid. The SKHX market, tracking the underlying shares, had been operating for some time, providing a baseline for price discovery. The SKHY market, tracking the ADRs, went live in the form of pre-IPO contracts one day before the Nasdaq listing. Once trading started on Nasdaq, the SKHY contracts switched to standard perpetual futures. This dual-market structure allowed traders to take positions on both sides of the arbitrage equation simultaneously. The launch of these contracts provided a synthetic avenue for cross-border arbitrage, enabling participants to express views on the premium without needing direct access to the Korean spot market or U.S. ADR lending facilities.

Funding rate divergence on July 13 revealed the strategic positioning of market participants. As the underlying shares tumbled, the funding rate for SKHX jumped to +0.10% per hour, indicating that long positions were paying short positions. Conversely, the funding rate for SKHY dropped to -0.065%, meaning shorts were paying longs. This divergence showed that longs flocked to the underlying shares side, betting on a rebound, while shorts moved to the ADR side, anticipating a correction. This combination pointed to a single strategy: placing a bet on narrowing the premium on Hyperliquid. Traders used USDC as collateral to execute these positions, bypassing the need for Korean won funds or foreign investor accounts. The funding rates thus served as a real-time indicator of market sentiment and the expected direction of the price gap.

Despite the utility of these futures, market limitations remained, particularly regarding funding rate hedging. The current structure of bilateral betting positions was not ideal, as funding rates accumulated hourly, leading to a reduction in collateral if the premium persisted. In spot arbitrage, converting underlying shares into ADRs would lock in the price gap as realized profit, but perpetual futures lacked such a forced convergence mechanism. SKHX converged toward the underlying share index, while SKHY converged toward the ADR index; neither could narrow the gap between the two indices. To hedge against variable funding costs, traders might look to platforms like Pendle, where Boros tokenizes funding rates into YU (Yield Unit), splitting them into fixed and floating parts. Positions like SKHX longs, which pay funding rates, could buy YU with floating funding rates on Boros to offset costs.

However, Boros currently only supports mainstream assets such as BTC and ETH, and HIP-3 stock perpetual futures have not been included yet. Therefore, trading this price gap currently means bearing fluctuations in funding costs without the ability to lock in future expenses.

Perpetual futures also functioned as leading indicators for the underlying markets. TradeXYZ’s SKHY pre-IPO market indicated a price of $164 three hours before Nasdaq opened, $169.80 one hour before, and $169.92 one minute before, while the actual opening price was $170. This precision demonstrated the predictive power of the derivatives market during periods when the original market was closed. The SKHX market also trades at night and on weekends when the KRX is closed, and Korean traders use its prices as a leading indicator for the next day’s opening. Perpetual futures are no longer limited to the role of derivatives that track underlying assets but generate prices first during periods of market inactivity.

Additionally, the market value of these contracts was inversely proportional to underlying asset accessibility. The funding rate for SKHY remained near zero except during periods like the sharp widening of the gap on the 13th, due to the existence of physical ADRs on Nasdaq and U.S. options listed from the 14th, which allowed arbitrageurs to capture the basis. In contrast, SKHX lacked hedging tools, making the funding rate the only mechanism for liquidation market. This made SKHX the largest single contract, accounting for 33% of HIP-3’s total trading volume and 50% of stock perpetual futures trading volume.

Looking ahead, the critical date is July 29, when the underlying shares are listed separately on the Korean exchange and applications to convert between original shares and ADRs become available. This event will partially open the blocked arbitrage channel, potentially reducing the premium.

However, asymmetry will persist because there are no restrictions on redeeming ADRs for underlying shares, but converting underlying shares into ADRs can only be done within the issuance limit. Narrowing the premium requires the latter process, making it uncertain whether the premium will narrow sharply. Even so, Hyperliquid remains the only place where this price gap can be traded, offering a unique venue for exploiting cross-border inefficiencies until the market fully converges.