Just a faint memory: The AI trade's brightest sector is getting nailed

Memory-chip stocks including Samsung, SK Hynix, and Micron have entered bear-market territory, falling more than 20% from recent highs, as investors grow harder to impress despite record profits and growth forecasts. The selloff reflects concerns over overspending on AI infrastructure and renewed geopolitical tensions, reversing a prolonged period of outperformance for the sector.

Just a faint memory: The AI trade's brightest sector is getting nailed Business Insider https://www.businessinsider.com Samsung and other memory-chip makers are finding out that AI investors are getting increasingly difficult to impress. - Memory stocks have slipped into a bear market after an eye-watering run higher in 2026. - Investors are telling memory-chip makers that even their best might not meet expectations. Sign up for First Trade https://www.businessinsider.com/subscription/newsletter/first-trade , Business Insider's daily markets newsletter. Things have been changing quickly in the US lately. The American soccer team went from national heroes to World Cup donkeys after some controversial presidential meddling https://www.nytimes.com/2026/07/05/us/politics/trump-fifa-balogun-world-cup.html and a lifeless performance against Belgium https://affiliate.insider.com/?h=feb0c5dc424187ed75df8fe6f2541f945032cc5ba46d5198190fbcd3ee019a35&postID=6a4e9bc5f38dd8af496120e0&postSlug=ai-memory-chip-stocks-samsung-skhynix-dram-etf-bear-market-2026-7&tags=service%3Acapi&u=https%3A%2F%2Fwww.espn.com%2Fsoccer%2Fmatch%2F %2FgameId%2F760507%2Fbelgium-united-states . The Iran war ceasefire went from foregone conclusion to uneasy standoff https://markets.businessinsider.com/news/commodities/oil-wti-brent-crude-price-us-iran-war-trump-ceasefire-2026-7 . The same has been true in the AI trade. After a prolonged period of outperformance for memory stocks and chipmakers — especially relative to hyperscalers like Microsoft and Meta — that dynamic is rapidly reversing. The comeuppance for the memory trade https://www.businessinsider.com/memory-stocks-bear-market-ai-sk-hynix-sndk-mu-wdc-2026-7 has been so swift, in fact, that as of Wednesday's close, many of its major players sat in bear-market territory, down more than 20% from recent highs. Let's quickly take stock: - South Korea's Kospi index: -20% - Roundhill Memory ETF: -23% - Samsung: -27% - SK Hynix: -32% - Sandisk: -26% - Micron: -22% To be fair, each of the individual stocks listed above are still up triple-digit percentages in 2026, while the Kospi is hanging tough with a roughly 70% year-to-date gain. But the speed of the reversal has investors wondering if this is the start of a deeper slide to come. Here's what's been weighing on the space: An AI company's best isn't always enough Samsung — and, by extension, the rest of the memory-chip sector — found this out the hard way https://www.businessinsider.com/stock-market-today-chips-selloff-samsung-micron-intel-marvell-amd-2026-7 this week. Record profit and a blistering growth forecast weren't enough to win over investors, who dumped shares in what amounted to a "sell the news" event. Worries remain that companies are overspending on the AI buildout. The episode secondarily highlighted the US market's growing sensitivity to Korean chipmakers https://www.businessinsider.com/korean-chipmaker-stock-selloff-samsung-sk-hynix-global-market-weakness-2026-6 , which, after a torrid start to 2026, have experienced some hiccups in recent weeks. That sensitivity will be tested anew on Friday, when SK Hynix https://www.businessinsider.com/kospi-sk-hynix-stock-price-adr-listing-samsung-chip-stocks-2026-7 begins trading on the Nasdaq following a record-breaking US ADR listing. Geopolitical tensions are flaring President Trump's latest calling-off of the US-Iran ceasefire exacerbated nerves around the AI trade. Traders have been pricing in a resolution — and looking favorably upon sinking oil prices https://www.businessinsider.com/crude-oil-price-iran-war-impact-levels-supply-shock-trump-2026-7 — for weeks. If the conflict is prolonged, and inflationary worries start to creep back into investor psyches, the hottest parts of the AI trade could slide further. A rotational snap back As stock returns for AI hyperscalers fell behind memory-chip makers, a growing chorus of Wall Street strategists started calling for a reversion of the trend https://www.businessinsider.com/magnificent-seven-stocks-buy-the-dip-meta-msft-amzn-goog-2026-7 . Mike Wilson, the CIO and chief US equity strategist at Morgan Stanley, was prescient with his Monday call for a chipmaker correction, and predicts a rotation back to hyperscalers. This conviction is shared by Ben Snider https://www.businessinsider.com/ai-stocks-investing-ideas-bubble-valuations-ben-snider-goldman-sachs-2026-7 , his counterpart at Goldman Sachs. All rotation arguments circle back to the same factor: valuations. As chipmakers test the upper bounds, some hyperscalers are looking downright cheap. Business Insider https://www.businessinsider.com/ai-memory-chip-stocks-samsung-skhynix-dram-etf-bear-market-2026-7 Get AI news in your inbox Daily digest of what matters in AI.