SK Hynix stock gains: ADR conversion cap could keep US shares trading at a premium

SK Hynix's US-listed shares rose in premarket trading on Thursday.

A report said the South Korean memory chipmaker has capped the number of domestic shares that can be converted into American depositary receipts (ADRs).

The move could keep the stock trading at a significant premium in New York.

The company, which made its Nasdaq debut on July 10 through a record-breaking $26.5 billion ADR offering, has limited the conversion of its Korea-listed shares into US-traded ADRs to 2.5% of total shares outstanding, according to the Korea Securities Depository (KSD), Bloomberg reported.

The clarification addresses one of the biggest questions hanging over the company's blockbuster US listing and could have important implications for pricing between its Seoul and New York shares.

The company's Nasdaq-listed shares were up by over 3% during premarket trade on Thursday.

Conversion quota already exhausted

According to KSD Chief Executive Officer Rhee Yunsu, the entire 2.5% allocation has already been used through SK Hynix's initial ADR issuance.

As a result, investors can no longer convert Seoul-listed shares into ADRs unless existing ADR holders first cancel their receipts and convert them back into Korean shares, thereby freeing up space under the cap.

The issue has been closely monitored by arbitrage traders since the company's US listing.

Normally, investors exploit price differences between a company's local shares and its ADRs by converting shares between the two markets, helping keep prices aligned.

However, with fresh ADR creation effectively halted, traders have fewer opportunities to eliminate pricing discrepancies.

That restriction could allow SK Hynix's US-listed shares to continue trading at a sizeable premium relative to their Korean counterparts.

Premium may remain elevated

Since listing in New York, SK Hynix ADRs have traded at premiums of as much as 51% compared with the Seoul-listed shares.

As of Wednesday, the premium remained around 33%.

Without the ability to freely create new ADRs, analysts expect the pricing gap to persist for longer than would normally be the case.

While traditional risk-free arbitrage is no longer possible, hedge funds may still trade the spread based on expectations for how investor sentiment evolves.

Broader demand for semiconductor stocks could also influence the premium.

The ongoing rally in semiconductor equities, reflected by gains in the Philadelphia Semiconductor Index, has continued to attract investor interest toward AI-related hardware companies such as SK Hynix, one of the world's leading suppliers of high-bandwidth memory chips used in artificial intelligence systems.

Investor appetite for emerging markets could also play a role, particularly among US investors who increasingly gain international exposure through exchange-traded funds rather than directly purchasing overseas stocks.

Currency and competition remain key variables

Currency movements may also affect the valuation gap between the two listings.

The Korean won has weakened significantly in recent years despite the country's strong current account surplus.

However, the currency has recovered modestly after the Bank of Korea recently raised interest rates.

A stronger won would naturally reduce the premium on US-listed ADRs if other market conditions remain unchanged.

Another longer-term factor could be increased competition for investor capital.

Market speculation has periodically suggested that Samsung Electronics could eventually pursue a US listing.

If that were to happen, investor demand currently concentrated on SK Hynix ADRs could become more diversified, potentially narrowing the valuation premium.

Earnings now become the next catalyst

Investors are now turning their attention to SK Hynix's second-quarter earnings, scheduled for release on July 29.

The ADR market is expected to remain constrained until then.

Citigroup, which serves as the depositary bank for the ADRs, has informed investors that issuance and cancellation of SK Hynix ADRs will remain suspended until July 29 because newly issued Korean common shares cannot be transferred until they are officially listed on the Korea Exchange.

The Korea Securities Depository oversees the issuance and cancellation of depositary receipts linked to South Korean companies.

The structure resembles that used by Taiwan Semiconductor Manufacturing Co.

While TSMC investors can cancel ADRs and receive local shares, they cannot freely create new ADRs from Taiwan-listed stock.

That system has historically allowed TSMC's US-listed shares to trade at an average premium of about 12.6% over its Taiwan listing during the past five years, according to Bloomberg data.

Each SK Hynix ADR represents one-tenth of a common share, with holders retaining the option to cancel their receipts and receive the underlying Korean stock.