New York stocks rose across the board on the 14th (local time), supported by easing inflation and strength in artificial intelligence (AI) semiconductors. The market’s attention, however, was focused on one name: SK hynix’s American depositary receipt (ADR) listed on Nasdaq surged 27.29% in a single day.
The Dow Jones Industrial Average closed up 9.63 points, or 0.02%, at 52,508.27. The S&P 500 rose 28.25 points, or 0.38%, to 7,543.59. The Nasdaq Composite, driven by technology stocks, gained 233.83 points, or 0.90%, to finish at 26,107.01.
The catalyst for the gains was the inflation report. U.S. consumer prices in June rose 3.5% from a year earlier, slowing from 4.2% in May and coming in below the market forecast of 3.8%. As concerns over further Federal Reserve rate hikes eased, investor sentiment improved.
◆ Banks’ earnings and semiconductors lead the rebound
The start of second-quarter earnings season also helped. Goldman Sachs jumped 9.00% on strength in trading and investment banking. JPMorgan Chase rose 2.5%, and Bank of America gained 1.88%. Citigroup fell 5.29% after strong earnings were overshadowed by news of layoffs.
Memory semiconductors, which had plunged the previous day, reversed direction within 24 hours. Nvidia rose 4.06%, while Micron (4.92%), SanDisk (5.01%), Intel (4.50%), and AMD (2.57%) also posted strong gains.
At the center of that move was SK hynix’s ADR. On its third trading day since listing on the 10th, it closed at $193.92, setting a new all-time high since its debut. It more than erased the 9.3% decline it had suffered the previous day, when it was hit by the Korean market’s sharp selloff.
◆ A 51% premium, an unusual surge driven by structure
The surge came without an earnings announcement or a new order disclosure. Analysts say it was driven by three overlapping factors.
The starting point was a Wall Street report. Simon Coles, an analyst at British investment bank Barclays, issued an “overweight” rating and a $330 target price for SK hynix ADR in a report on the day. That was 117% above the closing price on the 13th.
Barclays said memory supply shortages will worsen in 2027 and improve only marginally in 2028. The firm argued that continued investment in AI data centers will keep boosting demand for high-bandwidth memory (HBM).
Barclays also said the impact of Chinese semiconductor firms catching up would be limited. It assessed that the market structure would not be disrupted unless global cloud companies begin widely adopting Chinese-made DRAM for data centers. The bank also forecast that SK hynix would build up cash and cash equivalents exceeding 40% of its current market capitalization by the end of 2027, leaving room for stronger shareholder returns such as share buybacks.
The derivatives market added fuel. The Chicago Board Options Exchange (CBOE) launched options trading on SK hynix ADR that day. Trading volume reached around 150,000 contracts intraday on the first day. Analysts say buying of call options targeting short-term gains was heavy, and those who sold the options may have bought the underlying stock to hedge risk, pushing the share price even higher. The launch of a two-times leveraged exchange-traded fund (ETF) also drew speculative demand.
There was also a structural factor. One ADR represents one-tenth of a common share. But there are limitations in converting Korean common shares into ADRs. Even when U.S. demand surges, supply cannot keep up. For that reason, ADRs were already expected to trade at a premium to the Seoul-listed shares. The issue was speed: the premium widened from 3% at the offering to 51% in just three days. Bloomberg described it as an unusually high level.
◆ Two possible paths: premium normalization or revaluation of the common stock
Whether the 51% premium can be sustained is now the key question. The options market sent a cautious signal.
According to CNBC, the seven largest options trades of the day were all bearish bets, with put-selling dominating. That suggests many investors do not see much room for further gains after the sharp short-term rally.
Past examples point to premium compression. Kim Soo-hyun, head of research at DS Investment & Securities, said Taiwan’s TSMC also saw its ADR premium widen to 24%–26% shortly after listing, but over several years the gap narrowed to 14% as the relatively cheaper common stock rose. He said SK hynix’s common shares could rise at least 8%–18% simply from the ADR listing event.
That is where a practical takeaway emerges: rather than chasing the ADR at a rich premium, investors could turn to the undervalued common shares. According to Bloomberg, as of the 9th, the Kospi’s 12-month forward price-to-earnings ratio stood at 6.35 times, lower than the 6.82 times seen during the 2008 financial crisis.
This is largely due to the low single-digit to mid-single-digit P/E multiples of heavyweight names such as Samsung Electronics and SK hynix. The same company, the same earnings, but the U.S. market placed a 51% higher price tag on it. Analysts say that gap itself is evidence of the Korean market’s undervaluation.
There is also a practical guideline for investors. Those seeking to buy the ADR should first check the premium relative to the common stock, which is published daily, analysts say. Once that premium peaks and begins to fall, ADR investors can suffer losses unrelated to the industry cycle. Exchange-rate risk is added on top. By contrast, for common-stock investors, widening ADR premiums may signal improved foreign fund flows and a potential re-rating of value.
Domestic investors are already moving. About 84,000 investors through nine major Korean brokerage firms have reportedly bought 1.36 million SK hynix ADR shares, worth about 338.9 billion won. The purchases are seen as a bet on the higher valuation formed in the U.S. market and expectations of further upside.
This listing is also a test case for Korea’s capital market. Bloomberg noted that the SK hynix case is becoming a benchmark for gauging demand for overseas companies listing in the U.S. If the success continues, more major Korean companies could head to U.S. markets. That raises concerns about thinner liquidity in the domestic market, while also fueling hopes that global capital will help lift the value of Korean firms.
The remaining variable is the industry cycle. If the supply shortage continues for years, as Barclays predicts, both the common stock and the ADR will have earnings to support their prices regardless of the premium debate. If the cycle turns, however, the premium will disappear first. The question raised by this surge is ultimately one: which of the two prices set by the market is closer to true value? The answer will be determined by the memory chip cycle.