TLDR
- Micron and Sandisk shares rose after Samsung union talks collapsed.
- Samsung workers are threatening a strike from May 21 to June 7.
- Jefferies estimates a strike could cut global memory-chip output by 3%.
- AI demand continues driving tight supply for high-bandwidth memory chips.
- Analysts remain divided on whether Micron stock is overvalued after its rally.
Micron shares climbed in premarket trading on Wednesday after concerns grew around a possible Samsung labor strike that could tighten global memory-chip supply even further.
Sandisk shares also moved higher as investors reacted to reports that talks between Samsung and its labor union had broken down.
Samsung workers are demanding larger bonuses tied to company profits. Union leaders are seeking to remove legal barriers before launching a general walkout between May 21 and June 7.
According to Jefferies estimates, a strike could reduce global memory-chip production by around 3%.
The potential disruption comes as memory-chip supply is already under pressure due to rising artificial intelligence demand.
Micron has become one of the biggest beneficiaries of the AI infrastructure boom, particularly through its high-bandwidth memory products used in advanced AI systems.
The company’s entire 2026 high-bandwidth memory supply has already been sold out, according to recent company comments.
AI Demand Continues to Drive Memory Market
Investors have pushed Micron shares sharply higher over the past year as revenue and earnings surged.
Micron stock has gained more than 800% over the last 12 months and recently traded above $800 for the first time.
Revenue nearly tripled year over year, rising from $8 billion in fiscal second quarter 2025 to $23.8 billion in 2026.
The company remains one of only a small number of firms capable of supplying advanced high-bandwidth memory chips needed for AI data centers.
Sandisk could also benefit if Samsung faces production disruptions because the companies compete in NAND flash memory.
South Korean chipmaker SK Hynix also rose in local trading following reports of the failed union talks at Samsung.
Analysts Debate Micron Valuation
The strong rally in Micron shares has sparked debate among analysts over whether the stock has become too expensive.
Micron’s trailing price-to-earnings ratio has climbed to around 35, above its five-year average.
Some investors remain cautious because memory-chip markets have historically gone through boom-and-bust cycles.
Still, bullish analysts point to Micron’s forward price-to-earnings ratio of 7.6 and PEG ratio of 0.26 as signs the stock may still be reasonably valued.
Analysts also argue that AI demand could keep memory pricing and supply conditions stronger than in previous cycles.
Management has described current market conditions as a “supercycle” driven by AI infrastructure spending.
Investors are expected to continue monitoring Samsung labor negotiations, AI server demand and memory-chip pricing over the coming weeks.
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