SK Hynix's Nasdaq Debut, Measured

On July 10, 2026, SK Hynix — the Korean memory giant and Micron's closest listed rival — began trading in the US, in the year's second-largest listing after SpaceX's June deal. Its first session immediately ranked among the day's heaviest tapes. This page assembles the debut from primary records: the offering filing trail, the listing record, and the first session minute by minute. Every number is a stored query; expand any panel for the SQL.

The paper trail and the deal

SELECT
    (SELECT any(issuer_name) FROM global_markets.stocks_ipos
     WHERE issuer_name = 'SK Hynix Inc' AND listing_date = '2026-07-10') AS issuer,
    (SELECT toString(any(listing_date)) FROM global_markets.stocks_ipos
     WHERE issuer_name = 'SK Hynix Inc' AND listing_date = '2026-07-10') AS listed,
    (SELECT round(toFloat64(any(final_issue_price)), 2) FROM global_markets.stocks_ipos
     WHERE issuer_name = 'SK Hynix Inc' AND listing_date = '2026-07-10') AS recorded_issue_price,
    (SELECT round(any(total_offer_size) / 1e9, 1) FROM global_markets.stocks_ipos
     WHERE issuer_name = 'SK Hynix Inc' AND listing_date = '2026-07-10') AS raised_bn,
    (SELECT count() FROM global_markets.stocks_sec_edgar_index
     WHERE issuer_name ILIKE '%hynix%' AND filing_date >= '2026-05-01' AND filing_date <= '2026-07-10') AS sec_filings_before_debut,
    (SELECT countIf(form_type IN ('F-1', 'F-1/A')) FROM global_markets.stocks_sec_edgar_index
     WHERE issuer_name ILIKE '%hynix%' AND filing_date >= '2026-05-01' AND filing_date <= '2026-07-10') AS f1_registrations,
    (SELECT countIf(form_type = 'F-6') FROM global_markets.stocks_sec_edgar_index
     WHERE issuer_name ILIKE '%hynix%' AND filing_date >= '2026-05-01' AND filing_date <= '2026-07-10') AS f6_adr_registrations

The records: SK Hynix Inc, listed 2026-07-10, a recorded issue price of $158.14 and 28.1B raised — behind only SpaceX's June raise among 2026 US listings, with the whole half's table in the H1 IPO ledger. The filing trail marks this as a foreign private issuer debut: 2 F-1 registration filings (the overseas company's equivalent of an S-1) and 1 F-6 — the form that registers American Depositary Shares, the wrapper US investors actually trade. The US line is an ADS on Korean-listed stock, a plumbing fact with real consequences: the home listing in Seoul keeps trading its own hours, and the US price and the Korean price discipline each other across a twelve-hour time difference.

The first session, on one row

SELECT
    round(toFloat64(argMinIf(open, window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959)), 2) AS first_rth_print,
    round(100 * (toFloat64(argMinIf(open, window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959))
        / (SELECT toFloat64(any(final_issue_price)) FROM global_markets.stocks_ipos
           WHERE issuer_name = 'SK Hynix Inc' AND listing_date = '2026-07-10') - 1), 1) AS open_vs_issue_pct,
    round(minIf(toFloat64(low), (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959), 2) AS day_low,
    round(maxIf(toFloat64(high), (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959), 2) AS day_high,
    round(toFloat64(argMaxIf(close, window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959)), 2) AS first_close,
    round(sumIf(toFloat64(close) * toFloat64(volume), (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) / 1e9, 2) AS rth_dollar_bn,
    round(toFloat64(sum(volume)) / 1e6, 1) AS day_shares_m,
    (SELECT count() FROM global_markets.delayed_stocks_minute_aggs
     WHERE ticker = 'SKHYV' AND window_start < toDateTime('2026-07-10 00:00:00')) AS bars_before_debut
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SKHYV'
  AND window_start >= toDateTime('2026-07-10 04:00:00') AND window_start < toDateTime('2026-07-11 00:00:00')

The first regular print crossed at $170 — 7.5% above the recorded issue price — and the session closed at $168.33 on 18.03B of regular-hours dollars and 106.8 million shares: fifth-heaviest name on the entire tape that day, ahead of QQQ, as the day's recap records. The symbol receipt: 0 minute bars exist before July 10 — a genuinely new symbol, unlike the reused one SpaceX's debut arrived on.

Day-one microstructure: a young spread

SELECT
    toHour(toTimeZone(sip_timestamp, 'America/New_York')) AS et_hour,
    round(quantileDeterministicIf(0.5)((toFloat64(ask_price) - toFloat64(bid_price)) / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2) * 10000, toUInt64(toUnixTimestamp64Micro(sip_timestamp)), bid_price > 0 AND ask_price > bid_price), 1) AS med_spread_bps,
    count() AS quote_updates
FROM global_markets.cache_stocks_quotes
WHERE ticker = 'SKHYV'
  AND sip_timestamp >= toDateTime64('2026-07-10 13:30:00', 9) AND sip_timestamp < toDateTime64('2026-07-10 20:00:00', 9)
  AND (toHour(sip_timestamp) * 60 + toMinute(sip_timestamp)) BETWEEN 810 AND 1199
GROUP BY et_hour
ORDER BY et_hour

Measured on two-sided unlocked quotes, the debut-day median spread started wider in the opening hour (nan bps) and finished tighter (4.1 bps) — already tighter on day one than SpaceX's June listing showed in its early sessions, consistent with the size of the deal and the two-sided interest a rival to MU attracts. One receipt of absence completes the picture: no listed options traded on debut day — the options tape shows zero SKHYV prints on July 10, options listing typically following a new stock by days. When they arrive, the put-call complexion of this name against MU's will be worth its own panel.

What the debut did to the memory trade

The debut landed in the middle of the most-traded story of the month: MU — the stock that out-traded SPY itself for the whole week — cooled on the very session its rival's US line opened, and the equipment complex had gapped violently the day before. Co-timing, on the record, with the sector receipts in the week's recaps. Structurally, the US tape now carries both listed memory giants side by side for the first time — same industry, same customers, one pair of tickers — which makes relative-volume and relative-price panels between SKHYV and MU a standing feature of future coverage. Day one is in the books; the first-month playbook says the next receipts that matter are the spread's seasoning, the first short-interest print, and where the dollar volume settles once debut curiosity fades.

SK Hynix debut FAQ

What is SK Hynix's US ticker?

The US line trades as SKHYV — American Depositary Shares registered on Form F-6, receipted above, with the ordinary shares remaining listed in Korea.

How big was the SK Hynix US listing?

28.1B raised at a recorded issue price of $158.14 — the second-largest US listing of 2026 behind SpaceX, per the same offering records behind the H1 ledger.

How did SK Hynix stock do on its first day?

It opened 7.5% above the recorded issue price at $170 and closed at $168.33, trading 18.03B — the fifth-heaviest tape of the session.

Can I trade SK Hynix options?

Not on day one — the options tape shows zero listed SKHYV contracts traded on the debut. New listings typically get options within days; the expiration calendar explains the machinery they join.

Every panel is a stored, versioned query over listing records, SEC filings, and the tape — expand the SQL, or follow the seasoning yourself on the Strasmore terminal.