{"slug": "ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026", "title": "Ten stocks drove nearly all of the Nasdaq-100’s gains in the first half of 2026", "summary": "Ten stocks, led by Micron Technology, drove nearly all of the Nasdaq-100's 20% gain in the first half of 2026, with Micron alone contributing 26% of the index's returns after its stock quadrupled. The concentration raises concerns about market risk, as a similar dynamic played out in the S&P 500, where ten stocks accounted for 78% of its nearly 10% gain.", "body_md": "# Ten stocks drove nearly all of the Nasdaq-100’s gains in the first half of 2026\n\nMicron Technology alone accounted for 26% of index returns after its stock quadrupled, raising fresh questions about market concentration risk.\n\nThe Nasdaq-100 posted roughly a 20% gain in the first half of 2026. Ten stocks, almost all of them AI-adjacent chipmakers and memory hardware companies, were responsible for nearly the entire move.\n\n## Micron did the heavy lifting\n\nJefferies analyst Jeffery Favuzza put numbers to what many traders had been sensing. Micron Technology contributed 26% of the Nasdaq-100’s total returns in H1 2026, after its stock quadrupled over the same period, pushing its market cap to $1.3 trillion.\n\nThe full Jefferies breakdown of top contributors reads like an AI infrastructure shopping list. Advanced Micro Devices came in second at 16% of index returns, followed by Intel at 14%, Applied Materials at 10%, Lam Research at 9%, KLA Corporation at 6%, Sandisk at 5%, Marvell Technology at 5%, Cisco at 4%, and Western Digital at 4%.\n\nAdd those up and you get nearly 99% of the index’s H1 gains attributable to ten names.\n\nSandisk deserves its own sentence here. The company posted gains exceeding 800% year-to-date, driven by surging demand from AI data centers.\n\n## The S&P 500 told a similar story\n\nA comparable group of ten stocks accounted for 78% of the S&P 500’s nearly 10% gain over the same period. Micron led there too, contributing 17% of S&P 500 returns on its own.\n\nAs July opened, early trading signals pointed toward something shifting. The biggest H1 winners began showing signs of fatigue, while software names that had been left behind during the hardware rally started attracting attention.\n\nFor index investors, the concentration dynamic creates an asymmetric risk picture. A stock that contributed 26% of your gains on the way up contributes similarly on the way down.\n\nInvestors tracking these names heading into H2 2026 will want to watch two things closely. First, whether hyperscaler earnings calls continue to signal aggressive data center spending commitments or begin to show any moderation. Second, whether the software rotation has enough fundamental support behind it to sustain a leadership change rather than just a brief tactical shift.\n\n**Disclosure:** This article was edited by Editorial Team. For more information on how we create and review content, see our\n\n[Editorial Policy](https://cryptobriefing.com/editorial-policy/).", "url": "https://wpnews.pro/news/ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026", "canonical_source": "https://cryptobriefing.com/nasdaq-100-first-half-2026-ten-stocks/", "published_at": "2026-07-01 14:39:58+00:00", "updated_at": "2026-07-01 14:53:34.577702+00:00", "lang": "en", "topics": ["ai-infrastructure", "ai-chips", "ai-research"], "entities": ["Micron Technology", "Advanced Micro Devices", "Intel", "Applied Materials", "Lam Research", "KLA Corporation", "Sandisk", "Marvell Technology"], "alternates": {"html": "https://wpnews.pro/news/ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026", "markdown": "https://wpnews.pro/news/ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026.md", "text": "https://wpnews.pro/news/ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026.txt", "jsonld": "https://wpnews.pro/news/ten-stocks-drove-nearly-all-of-the-nasdaq-100s-gains-in-the-first-half-of-2026.jsonld"}}