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SKHY vs SK Hynix: The Nasdaq Premium to Seoul

How much more SK Hynix costs on the Nasdaq (SKHY) than in Seoul, every trading day since the ADR listed on July 10, 2026. One SKHY ADR represents one-tenth of an SK Hynix common share.

SKHY premium · Oct 2+44.2%over the Seoul price
SKHY close (Nasdaq)$195.13Oct 2, New York
Seoul price per ADR$135.31₩1,841,000 ÷ 10 at ₩1,360.6/$
Average since listing+36.0%56 trading days

The premium, day by day

SKHY closing price over the Seoul closing price converted to dollars per ADR. Highest +62.6% (Jul 30), lowest +14.8% (Jul 27).

+63%
Jul 10: +16.1%Jul 13: +23.7%Jul 14: +51.8%Jul 15: +26.1%Jul 16: +22.9%Jul 20: +27.5%Jul 21: +38.1%Jul 22: +33.6%Jul 23: +30.3%Jul 24: +29.5%Jul 27: +14.8%Jul 28: +23.0%Jul 29: +31.5%Jul 30: +62.6%Jul 31: +18.9%Aug 3: +30.8%Aug 4: +39.8%Aug 5: +29.3%Aug 6: +36.4%Aug 7: +37.9%Aug 10: +34.1%Aug 11: +40.9%Aug 12: +45.0%Aug 13: +47.3%Aug 14: +43.3%Aug 18: +32.5%Aug 19: +47.2%Aug 20: +34.0%Aug 21: +31.4%Aug 24: +28.8%Aug 25: +31.3%Aug 26: +29.3%Aug 27: +29.2%Aug 28: +34.5%Aug 31: +35.4%Sep 1: +29.8%Sep 2: +40.4%Sep 3: +39.3%Sep 4: +45.7%Sep 8: +39.0%Sep 9: +43.3%Sep 10: +36.1%Sep 11: +41.4%Sep 14: +39.2%Sep 15: +39.2%Sep 16: +35.6%Sep 17: +44.4%Sep 18: +39.3%Sep 21: +40.0%Sep 22: +45.9%Sep 23: +37.3%Sep 28: +39.4%Sep 29: +43.8%Sep 30: +40.0%Oct 1: +43.2%Oct 2: +44.2%
Jul 10Oct 2

Last 20 trading days

DateSKHYSeoul closeUSD/KRWSeoul per ADRPremium
Oct 2, 2026$195.13₩1,841,0001,360.6$135.31+44.2%
Oct 1, 2026$193.50₩1,833,0001,356.8$135.09+43.2%
Sep 30, 2026$184.15₩1,776,0001,350.5$131.51+40.0%
Sep 29, 2026$186.68₩1,765,0001,359.6$129.82+43.8%
Sep 28, 2026$181.92₩1,768,0001,354.5$130.53+39.4%
Sep 23, 2026$189.28₩1,862,0001,350.4$137.89+37.3%
Sep 22, 2026$195.37₩1,840,0001,373.7$133.95+45.9%
Sep 21, 2026$188.86₩1,868,0001,384.9$134.89+40.0%
Sep 18, 2026$187.50₩1,857,0001,379.5$134.61+39.3%
Sep 17, 2026$182.99₩1,745,0001,376.6$126.76+44.4%
Sep 16, 2026$174.87₩1,759,0001,363.6$129.00+35.6%
Sep 15, 2026$174.83₩1,690,0001,345.6$125.59+39.2%
Sep 14, 2026$175.63₩1,697,0001,344.6$126.20+39.2%
Sep 11, 2026$190.07₩1,812,0001,348.2$134.40+41.4%
Sep 10, 2026$188.30₩1,853,0001,339.2$138.37+36.1%
Sep 9, 2026$198.63₩1,856,0001,339.2$138.59+43.3%
Sep 8, 2026$185.55₩1,793,0001,343.6$133.45+39.0%
Sep 4, 2026$177.00₩1,647,0001,355.4$121.51+45.7%
Sep 3, 2026$163.68₩1,596,0001,358.4$117.49+39.3%
Sep 2, 2026$164.98₩1,613,0001,372.9$117.49+40.4%

How we calculate it

Premium = SKHY close × 10 × USD/KRW ÷ SK Hynix Seoul close − 1. Both closes are from the same calendar day, so the Nasdaq close comes about 13 hours after the Seoul close — news in between moves one and not the other. Days when either market was shut are left out.

Why the two prices can differ

An ADR only tracks its home share as closely as investors can swap one for the other. New ADRs are created by depositing Seoul shares with the depositary bank, which takes time, fees and access to the Korean market. When US demand for SKHY outruns that process, the ADR can trade above the Seoul price for long stretches.

Buying SK Hynix from abroad?
Seoul shares, the SKHY ADR and Korea ETFs compared.
Korean ADRs explained →

Data: SKHY and USD/KRW closing prices from Yahoo Finance; SK Hynix closing prices via Naver Finance. Each ADR = 0.1 common share. Updated after each Korean close. Delayed data, not investment advice. See also SK Hynix vs Micron.