Why SK Hynix's wild swings aren't only an AI story

By Huileng Tan You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. SK Hynix's shares have been whipsawed by a mix of AI optimism, a US listing premium, and leveraged trading flows. Michael Nagle/ Bloomberg/Getty Images South Korea's SK Hynix has been on a roller coaster recently, but little has actually changed about its position at the center of the AI boom. On Wednesday, the memory giant's Seoul-listed shares surged as much as 13% after its Nasdaq-listed American Depositary Receipts jumped 27% overnight. The rebound followed a sharp selloff earlier this week, extending the wild swings that have defined trading since SK Hynix's blockbuster Nasdaq debut on Friday. The swings haven't just been about direction. They've also exposed a growing gap between SK Hynix's US and Korean listings, as the Nasdaq-listed ADRs are now trading at roughly 35% above their Korean counterparts. Part of that premium reflects easier access rather than changing fundamentals. The Nasdaq listing removed longstanding hurdles for many US investors, including Korean settlement, currency administration, and investment mandate restrictions, according to Scott White, an analyst at Singapore-based Yaru Investments. But it has also created an unusual market dynamic, with early trading driven by a combination of "exceptional fundamentals, constrained float and crowded positioning across two markets with different investor bases," White wrote in a Monday note. Jing Jie Yu, an equity analyst at Morningstar, said he expects the ADRs to continue finding their footing given their limited trading history. That makes it difficult for investors to determine an appropriate premium over the Korean shares. Leverage magnifies volatility The ADR premium isn't the only technical force influencing the stock. Trading has also been amplified by single-stock leveraged ETFs tied to SK Hynix. Similar products launched in the US following SK Hynix's Nasdaq debut, adding another layer of momentum-driven trading. Those market dynamics are unlikely to disappear anytime soon. Morningstar's Yu said he expects "tremendous volatility" in both SK Hynix's ADRs and Korean shares. He added that unprecedented levels of retail participation and margin borrowing are exacerbating volatility, with margin calls likely to amplify selling during sharp pullbacks. Despite the market turbulence, analysts are broadly constructive on SK Hynix. South Korea's KB Securities said recent weakness reflected growing concerns over a slowdown in AI investment. That comes even though "neither the long-term AI growth trajectory nor memory supply-demand fundamentals have changed meaningfully from a month ago," Jeff Kim, the firm's head of research, wrote on Wednesday. "We therefore believe the recent share price decline reflects sentiment rather than fundamentals," Kim wrote. Read next Huileng Tan You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Huileng Tan is a senior reporter based in Singapore, covering markets, the global economy, commodities, and investing. Her reporting focuses on how shifts in money, demographics, technology, and policy are reshaping businesses, wealth, and everyday life around the world. Since joining Business Insider in 2021, she has covered everything from commodity booms and investor trends to China's economy, the AI trade, and the forces driving global markets. Before joining Business Insider, she reported for CNBC, Dow Jones, ICIS, and The Wall Street Journal. In 2018 and 2019, she won the Singapore Exchange Orb Awards for Story of the Year – Derivatives for her reporting on the global commodities and derivatives markets. Reach her at htan@businessinsider.com . Markets Stocks Stock Market More South Korea Tech