SK Hynix ADR Premium Hits 51% as Global Capital Floods into South Korean ETFs

The significant price disparity between SK Hynix American Depositary Receipts (ADRs) and its locally listed shares in South Korea is fueling a surge in proxy trading centered around South Korean ETFs.

BlackRock’s iShares MSCI South Korea ETF (ticker: EWY), with $23 billion in assets, attracted over $1.1 billion in a single day on Wednesday, following a record daily net inflow of $814 million the previous day. Since the fund allocates approximately one-quarter of its holdings to SK Hynix shares listed in South Korea, investors view it as the most convenient channel to indirectly gain exposure to the chip giant while bypassing the high-premium ADRs.

As of Thursday afternoon New York time, the premium on SK Hynix ADRs relative to local shares stood at approximately 27%, after surging to a historic peak of 51% the previous day. This spread is unlikely to narrow in the short term—the creation and redemption channels for ADRs will not reopen until later this month, and there remains uncertainty regarding subsequent conversion capacity and regulatory approvals.

Year-to-date, EWY has attracted over $6.3 billion in inflows, with its assets under management increasing by more than 180% since the beginning of the year.

High ADR Premiums and Blocked Arbitrage Mechanisms

The pricing gap between SK Hynix ADRs and local shares stems from a temporary malfunction in normal arbitrage mechanisms.

Typically, price discrepancies between ADRs and their corresponding local shares are quickly eliminated through creation or redemption conversions. However, the ADR book is currently closed to both creations and redemptions, with reopening expected later this month. Even when the channel reopens, it remains unclear how much conversion capacity will be available and whether additional regulatory approvals will be required.

This structural constraint has allowed the premium to persist. According to Bloomberg data, TSMC ADRs have averaged a premium of about 20% over the past year due to limited convertibility of local shares; SK Hynix faces a similar situation, albeit with a more extreme premium.

EWY Emerges as the Optimal Proxy Tool

Faced with elevated ADR premiums, some investors are turning to EWY to gain exposure to SK Hynix. EWY allocates about a quarter of its assets to SK Hynix shares listed in South Korea, while avoiding the complexities associated with holding South Korean stocks directly, such as non-trading hour operations and currency conversion.

"Investors are using EWY as a tool to gain exposure to South Korean-listed stocks," said Dave Lutz, equity sales trader and macro strategist at Jonestrading Institutional Services LLC.

Todd Sohn, chief ETF strategist at Strategas Securities, pointed out that "ETFs are essentially proxy trading tools, highly efficient for gaining exposure to themes in emerging or developed markets."

AI Chip Boom Drives Sustained Inflows

On a broader level, South Korean memory chip stocks have become one of the hottest AI trade targets this year. Following the listing of SK Hynix ADRs in the U.S., capital has continued to flow in despite periodic market volatility. In the local South Korean market, retail investor enthusiasm for single-stock ETFs focused on SK Hynix and Samsung Electronics has been intense, prompting regulators to temporarily halt new listings of such single-stock ETFs.

"Some of the inflows may stem from short covering," said Tom Graff, chief investment officer at Facet, an asset management firm in Baltimore. "Demand remains extremely strong, but whether it can sustain is unknown. However, it is logical that most short positions would quickly cut losses in this market environment."

Year-to-date, EWY’s assets under management have ballooned from less than $800 million to $23 billion, a rise of over 180%, reflecting the strong global appetite for South Korean tech assets.