How to trade SK Hynix's US stock listing? UBS: Buy ADR, sell Korean shares

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SK Hynix is about to be listed in the US, and UBS has given a clear arbitrage strategy: go long the American Depositary Receipts (ADR) while shorting the Korean shares listed in Seoul.

The UBS sales and trading department pointed out in a report to clients that SK Hynix ADR may be more attractive than Korean local shares due to lower holding costs and higher efficiency. In addition, global fund managers who previously could not include Seoul-listed stocks in their portfolios will be able to participate via US securities. The report states, "Going long ADR and shorting local shares from day one sounds like an obvious choice," and emphasizes, "Given the very low likelihood of ADR trading at a discount, the actual risk exposure of this trade is very limited and could be sizable."

SK Hynix ADR officially started its roadshow this week, with the company seeking to sell approximately 17.79 million ADRs corresponding to ordinary shares. Based on last Friday’s closing price, this US listing is estimated to be about $28 billion in size. SK Hynix's shares in Seoul have risen over 220% so far this year, with the company's market value reaching about $1 trillion.

ADR Premium Logic: Dual Drivers of Liquidity and Accessibility

UBS's trading logic is based on their anticipation of an ADR pricing premium. The report argues that institutional investors such as hedge funds will find ADRs cheaper to hold and more convenient to trade, which will drive US-listed shares to trade at a premium to Korean local shares.

At the same time, global retail investors hold relatively low positions in SK Hynix Korean shares overall. The report notes that although some US brokers have recently opened up trading channels for overseas retail investors to access Korean stocks, "all of this is very recent," and global retail positions in SK Hynix remain low; the launch of ADRs will significantly improve their accessibility.

Uncertainty in Stock Conversion Mechanism May Strengthen Premium Persistence

One of the core issues investors are focused on is the convertibility between ADRs and Korean local shares.

According to documents submitted to the US Securities and Exchange Commission (SEC), investors holding ADRs can cancel them and exchange for an equivalent number of Seoul-listed shares. However, the reverse operation—converting Korean local shares to ADRs—may require approvals from relevant authorities including Korean regulators, and this process may not necessarily be smooth.

UBS’s report points out that investors will pay close attention to SK Hynix’s approved "foreign shareholding quota," that is, whether conversion from local listing to US ADR can be smoothly achieved in the future. The report states, "If such flexibility is lacking and the conversion channels are inefficient and insufficient, US-listed shares may trade at a significant premium for a prolonged period."

ADR premiums due to lack of free convertibility are not unprecedented. TSMC's ADR traded at an average premium of about 16% over Taiwan-listed shares this month.

The UBS report uses this historical precedent as a reference anchor for SK Hynix ADR pricing. If stock conversion is restricted, SK Hynix ADR may also develop a similar sustained premium structure, which is the core basis for UBS's recommendation to long ADR and short Korean shares.

Risk Warning and DisclaimerThe market involves risks; investment must be prudent. This article does not constitute individual investment advice and does not take into account specific investment objectives, financial conditions, or needs of individual users. Users should consider whether any opinions, views, or conclusions in this article are suitable for their particular situation. Investments made on this basis are at your own risk. ```