Why SK Hynix Shares Are More Expensive in the U.S.: Does the 15.7% Gap Signal an Equivalent Rise?
As of 2026-07-12 10:01 Korea Standard Time, SK Hynix's American depositary shares closed at USD 168.01 on July 10, their first day of trading on Nasdaq.
Since 10 American depositary share represents 1 Korean common share, applying the Seoul foreign exchange market's closing rate of KRW 1,501.4 per U.S. dollar gives a Korean common-share equivalent price of approximately KRW 2,523,000.
That is approximately KRW 343,000, or 15.7% higher, than the Korean market's closing price of KRW 2,180,000 on the same day.
The U.S. price is indeed higher, but 15.7% does not represent a predetermined rate of increase for the Korean stock price.
The Price Gap Between the U.S. and Korea, Explained by the Numbers
| Comparison Item | Confirmed Value |
|---|---|
| U.S. depositary share closing price | USD 168.01 |
| Conversion ratio | 10 American depositary share = 1 common share |
| Exchange rate applied | KRW 1,501.4 per USD 1 |
| Korean common-share equivalent price | Approximately KRW 2,523,000 |
| Korean market closing price | KRW 2,180,000 |
| Simple price difference | Approximately KRW 343,000 |
| Simple premium | Approximately 15.7% |
The calculation is as follows.
USD 168.01 × 10 shares × KRW 1,501.4
= Approximately KRW 2,522,500
However, the converted result may vary slightly depending on when the exchange rate is applied and which closing prices are used for each exchange.
Why Shares in the Same Company Trade at Different Prices
The first factor to examine is trading hours.
The Korean market closed earlier in the afternoon on July 10, while Nasdaq trading began later that night in Korean time and continued into the early hours of the following day. The U.S. closing price was therefore established after the Korean closing price.
Consequently, the 15.7% gap reflects both the time difference and investor sentiment newly incorporated into the U.S. market price. It should not be regarded as a fixed premium established while both markets were trading simultaneously.
Improved accessibility for U.S. investors also played a role.
Previously, U.S. investors seeking direct exposure to SK Hynix needed an account capable of trading in the Korean market and had to handle currency conversion into Korean won. Following the Nasdaq listing, they can trade the shares in U.S. dollars through American brokerage accounts, simplifying the investment process.
The offering price was set at USD 149, approximately 2.7% above the recent average price in the Seoul market. Demand for the offering was also reportedly more than 7 times the available shares. Stronger U.S. investor demand relative to supply during the initial listing period is interpreted as a factor behind the first-day price increase.
Arbitrage transactions that could narrow the price gap do not necessarily occur immediately.
This is because of the procedures involved in converting depositary shares and Korean common shares, settlement delays, currency conversion costs, taxes, and differences in trading hours. Even when the relevant conversion procedures are available, the two markets are not structured to maintain exactly identical prices at every moment.
What Could This Mean for the Korean Stock Price?
Closing 12.76% above the offering price in the U.S. market signals strong global investment demand. This could have a positive effect on investor sentiment in the Korean market on July 13.
However, that does not mean the Korean stock price must immediately rise to the U.S.-equivalent price of KRW 2,520,000.
The price gap could narrow in several ways.
The Korean stock price could rise.
The price of the American depositary shares could fall.
The won-dollar exchange rate could change.
Prices in both markets could move simultaneously.
Once the Korean market reopens, foreign investor flows, semiconductor sector trends, movements in U.S. technology stocks, exchange rates, and profit-taking activity will all influence pricing.
In particular, SK Hynix's Korean common shares had already risen sharply before the U.S. listing and had recently undergone a correction from their highs. Regardless of the strong demand on the first trading day, the company's medium- to long-term share price will ultimately be determined by HBM sales, memory prices, capital expenditure, and earnings performance.
The U.S. closing price converted into Korean won is a reference figure for investment comparisons and does not guarantee the Korean stock's percentage gain on the next trading day.
Key Points to Verify
Confirmed facts: The American depositary shares closed at USD 168.01, and their value calculated using the same conversion ratio and exchange rate was approximately 15.7% higher than the Korean closing price.
Market interpretation: Improved accessibility for U.S. investors and investment demand for AI memory have created a separate premium in the U.S. market price.
What remains uncertain is how much of this price gap will be reflected in the Korean market on July 13. The actual direction of the Korean stock price must be assessed after the market opens, using trading volume and investment flows by investor category.
When comparing SK Hynix's American depositary shares with its Korean common shares, consider not only their percentage price changes but also the conversion ratio, exchange rate, trading hours, and the timing of closing prices in both markets.
Check the latest regulatory disclosures and next-session market prices to compare how the actual price gap changes.
※ This article is provided for informational purposes to help readers understand market developments. It does not constitute an investment recommendation regarding any particular stock or asset. All final investment decisions and associated responsibilities rest with the individual investor.