SK Hynix's US-listed ADR trades 33.2% above its domestic Korean shares, according to a Shinhan Investment Securities report by analyst Lee Jeong-bin dated the 23rd. The premium, which peaked at 52% shortly after the ADR's listing from an initial 3%, may narrow through domestic share price appreciation rather than ADR declines, the analysis states. Mutual conversion procedures between domestic shares and ADRs are set to begin on the 29th, when 17.79 million shares (2.5% of issued stock) will also be listed domestically. The premium expanded as high US investor demand concentrated on limited ADR supply while arbitrage mechanisms between the two markets did not function smoothly, with foreign investors net-selling domestic shares while individuals and institutions absorbed the selling pressure. SK Hynix's current 12-month forward P/E ratio of 4.7x sits in historically undervalued territory, while its ADR premium substantially exceeds the 13% average maintained by Taiwan's TSMC since 1998.
SK Hynix ADR Premium Remains Above TSMC Historical Average
The SK Hynix ADR began trading approximately 3% above the domestic share price immediately after listing, but the premium rapidly expanded to 52% before moderating to the current 33.2%. During the period of sharp ADR price increases, domestic shares showed relative weakness. Foreign investors continued net-selling domestic shares in the Korean market following the ADR listing, while individual and institutional investors absorbed a substantial portion of this selling. The report notes that simultaneous buying of ADRs in the US market and selling of domestic shares in Korea may have contributed to the premium expansion. The current 33.2% premium remains significantly higher than TSMC's benchmark. TSMC's ADR has maintained an average premium of approximately 13% over its domestic shares since 1998, with a 12.6% average over the past five years and 17.3% over the past three years.
Mutual Conversion Procedures and New Share Listings Begin on the 29th
On the 29th, 17.79 million shares of ADR underlying stock will be additionally listed in the domestic market, and mutual conversion applications between domestic shares and ADRs will commence. The additional listing volume represents 2.5% of issued shares. However, these shares are deposited for ADR issuance purposes and do not immediately increase the domestic floating share count. Once mutual conversion begins, arbitrage transactions become possible: purchasing domestic shares, converting them to ADRs, and selling in the US market. If the ADR premium exceeds conversion costs, buying demand may flow into domestic shares while ADR supply in the US market could increase. Actual conversion requires administrative procedures including Korea Securities Depository application, Citibank issuance limit confirmation, and foreign exchange reporting. Approximately 22.5% additional issuance capacity exists under SEC registration standards, but actual supply depends on depository institution operations and approvals. Lee stated that "the 29th represents the first turning point to confirm actual ADR supply response, rather than a date when premium normalization is confirmed."
Historical Data Shows Domestic Share Price Gains During High Premium Periods
Analysis of seven companies that listed ADRs in the US—TSMC, UMC, ASML, Sony, POSCO Holdings, KT, and SK Telecom—revealed that after ADR premiums entered the top 10% of their historical distribution, domestic shares recorded average excess returns of 2.81 percentage points over 20 trading days and 4.05 percentage points over 60 trading days compared to the market. Even during periods when the price gap narrowed, domestic share price increases had greater impact than ADR price declines. In the top 10% premium range, 48.8% of premium narrowing cases occurred through domestic share price rises, while ADR declines accounted for only 14.2%. Lee noted that "the ADR premium is likely to be maintained at a certain level rather than converging to zero," adding that "in intervals where the premium becomes extremely high, domestic share price increases can account for a considerable portion of the price gap reduction." The report emphasizes that SK Hynix's 12-month forward P/E ratio of approximately 4.7x places it in a historically undervalued range.
FAQ
What is the current premium of SK Hynix's ADR over its domestic shares?
SK Hynix's ADR trades 33.2% above its domestic Korean shares as of the report dated the 23rd, according to Shinhan Investment Securities analyst Lee Jeong-bin. The premium peaked at 52% shortly after the ADR's initial listing from a starting level of approximately 3%.
When do mutual conversion procedures between SK Hynix domestic shares and ADRs begin?
Mutual conversion procedures between SK Hynix domestic shares and ADRs are set to begin on the 29th. On the same date, 17.79 million shares of ADR underlying stock (representing 2.5% of issued shares) will be additionally listed in the domestic market.
How did domestic shares perform historically when ADR premiums reached extremely high levels?
Historical analysis of seven companies showed that after ADR premiums entered the top 10% of their distribution, domestic shares outperformed the market by an average of 2.81 percentage points over 20 trading days and 4.05 percentage points over 60 trading days. In the top 10% premium range, 48.8% of premium narrowing cases occurred through domestic share price increases, while only 14.2% resulted from ADR price declines.
