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SK hynix (SKHY) and Samsung Electronics: SK hynix Is Spending $720 Billion on Memory Chips. Its Stock Has Already Fallen 21%

On August 13, 2026, CNBC reported that SK hynix Inc. (NASDAQ:SKHY) is spending $720 billion on what it calls the largest network of memory factories in the world. This buildout is so large that South Korea’s president is urging both SK Hynix and rival Samsung to add capacity even faster under a national plan to double the country’s memory production within five years.

Why This Matters

SK Hynix expects huge AI memory demand to stay strong permanently rather than follow the usual cycles of high sales and sudden crashes. That raises the real question: does this scale of investment lock in SK Hynix’s lead for years or set up a painful oversupply problem if AI memory demand ever slows?

SK hynix Expands HBM Lead with Record Nasdaq Listing Despite AI Pullback

SK hynix Inc. (NASDAQ:SKHY) controlled 58% of the high-bandwidth memory market in the first quarter, well ahead of Samsung and Micron at 21% each. Its market cap has jumped more than fivefold in the past year to top $1 trillion. The firm raised $26.5 billion in July by listing on the Nasdaq, the most ever raised by a foreign company on US markets. It has signed 10 long-term supply agreements with major customers, including a $500 billion co-development deal with Nvidia. SK Group chairman Chey Tae-won said demand is like “a war,” with everybody wanting to buy memory chips.

However, SK hynix Inc. (NASDAQ:SKHY)’s Nasdaq-listed shares have already fallen about 21% from their July 14 high, closing recently at $154.41 amid broader AI-trade volatility. The buildout is so large it shrinks DRAM supply for ordinary consumer electronics, and Chey himself admitted “prices went up too fast,” acknowledging the boom carries real excess.

Samsung Shares Surge on Temasek Investment News Amid Shareholder Return Push

Samsung is being pushed by the same government-backed national plan and could see a similar surge in shareholder returns. KB Securities analysts expect more than a tenfold increase. A report that Singapore’s Temasek plans to invest directly in Samsung sent its shares up 6.7% in a single day.

Samsung trades at just 4.2 times forward earnings, showing market skepticism about the memory sector’s valuation even after the recent rebound. It remains the number-two HBM player behind SK hynix Inc. (NASDAQ:SKHY) despite investing similarly large sums.

Conclusion

SK Hynix’s spending shows real conviction that AI memory demand is structural, but its own stock’s 21% slide is a reminder that investors aren’t fully convinced yet.

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Disclosure: None. This article is originally published at Insider Monkey.

The $250 Trillion AI Hype is Real. A few years from now, you’ll probably wish you’d bought this stock.

Dr. Inan Dogan

Dr. Ian Dogan

Co-Founder and Research Director at Insider Monkey

When Jeff Bezos said that one breakthrough technology would shape Amazon’s destiny, even Wall Street’s biggest analysts were caught off guard.

Fast forward a year and Amazon’s new CEO Andy Jassy described generative AI as a “once-in-a-lifetime” technology that is already being used across Amazon to reinvent customer experiences.

At the 8th Future Investment Initiative conference, Elon Musk predicted that by 2040 there would be at least 10 billion humanoid robots, with each priced between $20,000 and $25,000.

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  • 140 Metas
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  • 65 Microsofts
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Dr. Inan Dogan

Dr. Ian Dogan

Co-Founder and Research Director at Insider Monkey

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