SK Hynix Announced Korea's Largest Share Cancellation, Stock Rose 13%

On July 29 a South Korean company reported the largest quarterly profit in its history: 60.5426 trillion won of operating profit on a 76% margin. For every 100 won sold, it kept 76.

The stock fell.

Three weeks later the same company announced no new product, customer or plant; its board published a one-page resolution: a share count, a start date, an end date.

The next day SK Hynix rose as much as 14% intraday, closed up 12.73% at 1,691,000 won, and carried the KOSPI 5.89% higher.

Why a Record Profit Did Not Rescue the Stock

Revenue reached 79.3187 trillion won, up 257%; operating profit rose 557%. Net income was 93.9226 trillion won, above operating profit on a non-operating gain from revaluing the Kioxia stake.

The quarter closed with 88 trillion won of cash against 18.6 trillion won of debt. Net cash: 69.4 trillion won. Background: How to Read a Balance Sheet.

The sentence investors wanted never came: returns would be disclosed "sometime in the third quarter." The former chairman of the Korea Corporate Governance Forum said he was "really angry."

On August 7 the board approved 54 trillion won for two new fabs: 35.2 trillion for Y2 DRAM at Yongin, 19.1 trillion for M17 NAND at Cheongju. The stated reason was the severest memory shortage the industry has seen, potentially in 2027.

The stock fell 5% that day too: the cash is there, the destination is decided, and the shareholder's turn is unscheduled.

Then the weather turned: on August 18 and 19 rising Treasury yields, geopolitical tension and a rotation out of AI hit chip stocks. In Seoul the KOSPI fell 5.80% and SK Hynix lost roughly 9.8%.

Why the Word "Buyback" Meant Something Else in Korea

On February 25, 2026 the National Assembly passed the third amendment to the Commercial Act, effective March 6: a company acquiring its own shares must cancel them within one year. Convertible bonds backed by treasury shares, pledging and spin-off allocation were prohibited.

SK Hynix saying it will cancel is not generosity; since March 2026 cancellation has been the legal default. What it chose was not cancellation but scale.

In the month the law took effect, 102 companies cancelled 15.8 trillion won of stock, a 159% jump.

One Word in the Sentence

The real change is not the 40 trillion won but a single preposition in the policy text.

The previous policy said returns for 2025–2027 would fall within 50% of cumulative free cash flow. The new policy says returns will be more than 50%.

Same number. Opposite direction. Background: Cash Flow.

On July 29 there was no instrument behind the promise, only "we'll disclose in the third quarter." On August 19 there is one: a share count, a named broker, registered dates.

The Arithmetic: 3.3% of Shares, 3.41% of Earnings, ₩645 Billion a Day

The first effect is earnings per share. Cancelling 3.3% of the shares leaves 96.7%, so earnings per share rise by 1 divided by 0.967 — 3.41%. A real gain, and small next to a 12.73% day.

The second is cash. 40.0043 trillion won equals 66% of one quarter's operating profit; with 54 trillion won of fab spending, commitments reach 94 trillion won. The buyback alone consumes 58% of the 69.4 trillion won net cash.

The third is flow. There are 66 weekdays between August 20 and November 19, roughly 62 trading days net of holidays — an average of ₩645 billion, about 388,000 shares, a day.

The market now knows there is a buyer of known size for three months — Citi's "meaningful floor for the share price." Background: Spread and Liquidity.

What the Market Priced, and What It Did Not

The strangest line is the top one: SK Securities, the executing broker, hit its daily limit-up at +29.79% with nothing happening to its own business.

Samsung Electronics' 9.49% came not from SK Hynix's decision but from expectations about its own: local press reported a shareholder-return package exceeding 100 trillion won this month. The market converted one company's announced policy into another's unannounced one.

Foreign investors bought a net 1.7 trillion won on the day; domestic institutions and retail were sellers.

The Other Side

What Is Still Open

Samsung. The market priced Samsung off SK Hynix's decision; if its own package misses the expected scale, the basis for that 9.49% move disappears.

The clock. The one-year cancellation deadline starts running on every share purchased; a program completed in November must be cancelled during 2027.

The dividend. A special dividend remains under consideration, with details at the late-October earnings disclosure. Background: Dividends.

This piece draws on SK hynix's own second-quarter results release, press accounts of the buyback filing lodged with the Korean exchange, Reuters and Seoul Economic Daily reporting, closing data for the August 20 session from The Korea Times and The Korea Herald, and law-firm analysis of the third amendment to Korea's Commercial Act. The earnings-per-share, daily purchase pace, and cash-ratio calculations are our own, derived from those disclosed figures, and are not company commitments. Sources differ on year-to-date return figures, so the measurement period is stated explicitly in the text.

Correction (September 13, 2026): prose tightened for rhythm; figures and sources unchanged.