A person familiar with the matter said South Korea's foreign exchange stabilization fund purchased about $20 billion in funds repatriated after SK Hynix's ADR listing, as reported by BlockBeats.

U.S. semiconductor and storage names moved lower during intraday trading on Sept. 1, according to market data from BIT (bit.com). The Philadelphia Semiconductor Index fell more than 3%, while several major chip and storage-related stocks posted losses across the session. Intel led the declines among the listed names, down 3.88%, followed by AMD at 3.48% and Nvidia at 3.25%. In storage, Micron Technology slipped 2.53%, Sandisk fell 2.26%, Seagate Technology lost 3.06%, and Western Digital dropped 1.94%. SK Hynix ADR also traded lower, down 2.41%. The move reflected broad weakness across the semiconductor and storage segment during U.S. market hours.

U.S. stocks finished higher on Aug. 26, according to market data from BIT (bit.com), with the Dow Jones Industrial Average up 0.3%, the S&P 500 gaining 0.32%, and the Nasdaq rising 0.66%. Nvidia climbed more than 2%, ending a seven-session losing streak. Strength was also seen across storage, semiconductor, optical communications, and crypto-linked names. In storage and semiconductors, Intel rose 0.25%, AMD gained 4.91%, Micron added 2.48%, SanDisk fell 0.83%, Seagate advanced 3.4%, Western Digital rose 3.53%, and SK Hynix ADRs gained 2.68%. In optical communications, Lumentum rose more than 6%, Applied Optoelectronics gained more than 5%, and Coherent climbed more than 4%. Among crypto-related stocks, Circle and Coinbase each rose more than 4%, while Strategy gained more than 3%.

Storage and semiconductor names moved higher in U.S. premarket trading on Aug. 25, according to market data from BIT (bit.com). Intel led the listed gainers with a 2.29% rise, followed by SK Hynix ADR at 2.11%. Western Digital rose 1.82%, Sandisk gained 1.8%, AMD added 1.77%, Micron Technology climbed 1.7%, Seagate Technology advanced 1.5%, and Nvidia was up 1.1%. The move covered both chipmakers and storage-related stocks, pointing to broad strength across the segment in premarket action. BlockBeats cited the data in a market update published the same day.

South Korean retail investors have been pouring money into SK Hynix American depositary receipts listed on Nasdaq, creating a sharp premium over the company’s locally traded shares, according to data from Korea Securities Depository and Settlement institutions cited by Odaily. From July 10, when the ADR began trading on Nasdaq, through Aug. 19, South Korean investors were net buyers of about $835 million worth of SK Hynix ADRs, or roughly KRW 1.16 trillion. That made the stock the second-most purchased U.S. equity among South Korean investors during the period and accounted for 16.4% of their total net buying in U.S. stocks. The buying spree has widened the gap between the ADR and the Seoul-listed common stock. On Aug. 19, SK Hynix shares in South Korea fell 9.75% to close at KRW 1.5 million, while the ADR rose 0.35% in the U.S. market to $156.16. Because one SK Hynix ADR represents 0.1 of a South Korean common share, the implied common-share value should be about 10 times the ADR price. As of Aug. 19, however, the local share price stood at only 6.82 times the ADR-implied value, leaving the ADR at an estimated 46.67% premium to the domestic stock.

U.S. stocks fell for a third straight session Tuesday as higher long-term bond yields put fresh pressure on richly valued technology names. The Nasdaq Composite dropped 1.33%, underperforming the Dow Jones Industrial Average and the S&P 500, while the 30-year U.S. Treasury yield briefly touched 5.338%, its highest level since 2007. The move was part of a wider global bond sell-off that also pushed long-dated yields higher in France, Germany, Japan and the U.K. Markets are increasingly focused on the growing debt burden tied to artificial intelligence expansion. According to figures cited in the report, AI-related bond issuance has reached $489 billion so far this year, well above an earlier full-year 2025 estimate of roughly $322 billion, while The Wall Street Journal reported that nine major technology companies have about $3 trillion in off-balance-sheet AI commitments. That backdrop hit semiconductors, memory, optical communications and AI cloud-service providers especially hard. Investors are also weighing fiscal deficits, oil-driven inflation risks tied to the Iran situation, and a heavy event calendar that includes U.S. tariffs on some Canadian products, a 20-year Treasury auction, Federal Reserve minutes and China’s one-year LPR decision.

Korean retail investors bought about $4.5 billion of U.S. stocks in July, according to the Korea Securities Depository, with roughly $840 million flowing into SK Hynix’s U.S.-listed ADR. That ADR is trading about 10% above the company’s shares in Korea, while financing balances on the Korean stock market fell from about 37 trillion won at the end of June to about 27 trillion won in early August. Acadian Asset Management executive vice president Owen Lamont said the price gap could be a sign of excessive speculation, even a symptom of a bubble. The shift into U.S. markets has not reduced risk-taking. AI, semiconductors and leveraged products remain the main bets, and four of the 10 most-purchased U.S. stocks in July were leveraged products, led by Direxion Daily Semiconductor Bull 3X Shares (SOXL). Analysts said Korean investors may simply be moving high-risk AI trades from the domestic market to the U.S. rather than exiting risk assets altogether. Industry participants also said Korea’s capital base is not large enough to move the broader U.S. market, but concentrated trading could still amplify swings in volatile names such as AI chips, quantum computing and leveraged ETFs.

According to TradingBeats (formerly Hyperinsight), the SK Hynix ADR mapping contract SKHY is trading at a 36.06% premium to SKHX, with the gap still widening. A whale address starting with 0xe091 has built a roughly $11.09 million spread position using 5x isolated leverage on both legs—long 5,400 SKHX and short 40,000 SKHY. The combined position currently shows an unrealized loss of about $16,700, while hourly funding costs total approximately $1,144, translating to a static daily carry of around $27,500.