SK Hynix's US American Depositary Receipt (ADR) is trading at nearly a 50% premium over its Korean domestic shares, prompting a stark warning from overseas financial expert Owen Lamont, portfolio manager at Acadian Asset Management, who likened the phenomenon to asset market overheating seen during the dotcom bubble. According to the financial investment industry on the 24th, Lamont, a behavioral finance authority, stated in a recent report that "the price divergence where one company has two vastly different prices has reached an extreme" and that "in a normally functioning market, these two prices should be the same." SK Hynix listed its ADR on the Nasdaq on the 10th, raising approximately $27 billion (about 37 trillion won) in the largest-ever US market offering by a foreign company, with the ADR surging 13% on its first day amid a 7-to-1 subscription ratio and the premium over domestic shares reaching 49% at one point. Lamont diagnosed the breakdown of the "Law of One Price" principle for a single stock as a typical symptom of equity bubble formation, noting that "such pricing errors are frequently observed during market bubble periods" and drawing parallels to March 2000 when Indian software firm Infosys's ADR premium soared to 136% during the dotcom bubble.
Lamont Compares SK Hynix ADR Premium to 2000 Dotcom Bubble
Lamont, known domestically for his "Squid Game Stock Market" report last year that likened Korean retail investors' high-risk investing to the Netflix drama, pointed to the SK Hynix ADR premium as a repeat of historical bubble patterns. He stated that "such pricing errors are frequently observed during market bubble periods" and that the current situation "follows the same trajectory as the March 2000 dotcom bubble when Indian software company Infosys's ADR premium surged to 136%." The SK Hynix ADR premium of 49% stands in stark contrast to other Korean ADRs: KB Financial and Shinhan Financial currently trade at approximately 0% premium, and Taiwan's TSMC ADR premium of approximately 15% is three times lower than SK Hynix's divergence rate.
Structural Barriers Block Arbitrage Between ADR and Domestic Shares
The primary cause of the persistent price imbalance is structural constraints and extreme volatility that block arbitrage trading. Market participants expect the price gap to narrow after new share listing on the 29th when conversion of domestic shares to ADR is permitted, but practical obstacles remain significant. To convert domestic shares to ADR, existing ADR holders must first exchange their ADR for domestic shares to create "available quota," but no rational investor would exchange into undervalued Korean domestic shares when ADR trades 49% higher. Additional complications include final approval schedules from the Korea Securities Depository and issuing institution Citibank, and regulatory uncertainty surrounding the securities registration statement filing requirement (7 business days) for domestic share conversion, effectively blocking mechanical arbitrage.
Extreme Volatility Deters Arbitrage Traders
Lamont explained that "it is impossible to know how far the premium will extend, so arbitrage forces attempting 'ADR short, domestic share long' positions cannot readily enter due to risk burden" and that "if one establishes an arbitrage position at 49% premium and the premium expands to 136% as in the past Infosys case, massive losses could result." Extreme price volatility also obstructs arbitrage. SK Hynix domestic shares show annualized volatility exceeding 100%, while US ADR volatility surpasses 200%. Trading volume concentration in single-stock leveraged ETFs listed on Hong Kong and domestic markets significantly amplified volatility in both domestic shares and ADR. Lamont remarked, "I have pointed out that the US stock market is showing 'Koreanization' led by risk-seeking retail investors, but I never imagined the US would overtake Korea in the volatility competition."
Lamont Criticizes Korean Retail Investors' Self-Harming Buying Behavior
Lamont stated he could logically understand US retail investors or passive funds buying ADR in anticipation of Nasdaq 100 index inclusion, but raised strong doubts about Korean retail investors' purchasing behavior. According to Korea Securities Depository data, Korean retail investors net purchased over $500 million (approximately 690 billion won) in SK Hynix ADR through the 17th. He criticized this as "buying the identical stock for $149 in the US market that can be purchased for $100 in the Korean home market" and called it "a self-harming investment behavior that is difficult to understand." Lamont warned that historically, large-scale ADR issuance by foreign companies in US markets has served as a signal of market peaks, citing the 1999-2000 dotcom bubble and 2021-2022 liquidity rally when foreign company US listings surged. The report noted that Samsung Electronics and Japan's Kioxia are known to be considering US ADR listings, warning that successive foreign company US market issuance would serve as a bubble indicator.
Lamont Recommends SK Hynix Issue Additional ADR and Buy Back Domestic Shares
Lamont cited his 2003 paper co-authored with Nobel laureate Richard Thaler of the University of Chicago, asking "if the market cannot correct such an obvious and simple pricing error, how much more severe is the overheating of other asset prices?" He recommended that "SK Hynix should consider promptly issuing additional ADR at the high premium and using the funds obtained to purchase relatively undervalued Korean domestic shares for treasury stock acquisition as a market response."
FAQ
What premium is SK Hynix ADR trading at over domestic shares?
SK Hynix's US ADR is trading at nearly a 50% premium over its Korean domestic shares, with the premium reaching 49% at its peak after the ADR listed on Nasdaq on the 10th.
Why did Owen Lamont compare SK Hynix ADR to the dotcom bubble?
Lamont stated the extreme price divergence where one company has two vastly different prices is a typical symptom of equity bubble formation, drawing parallels to March 2000 when Infosys's ADR premium soared to 136% during the dotcom bubble.
Why cannot arbitrage traders close the SK Hynix ADR price gap?
Arbitrage is blocked by structural constraints including the requirement for existing ADR holders to first convert to domestic shares to create quota, regulatory approval delays, and extreme volatility exceeding 100% for domestic shares and 200% for ADR that creates massive loss risk if the premium expands further.
