Tech sell-off resumes, counterbalancing bond yield relief: AlphaCheck
Yahoo Finance ·
Tech sell-off resumes, counterbalancing bond yield relief: AlphaCheck Grace O'Donnell · Editor, Special Projects Wed, August 19, 2026 at 10:14 AM EDT 1 min read ^DJI MRNA ^IXIC AMD MRK Good morning. Stocks turned higher at the open, but tech stocks resumed their sell-off from yesterday. While the Nasdaq Composite ( ^IXIC ) fell in early trading, the Dow ( ^DJI ) and S&P 500 ( ^GSPC ) were buoyed by falling bond yields after the US Treasury Department stepped in to support buybacks of long-dated securities. Here's a check of the markets in the first few minutes of trading, based on a heat map powered by Yahoo Finance AlphaSpace data . The tech sector ( XLK ) faced renewed selling pressure as semiconductor stocks continued to slide, led by declines in shares of Intel ( INTC ), AMD ( AMD ), and Broadcom ( AVGO ). On the other end of the spectrum, Healthcare ( XLV ) saw tremendous strength, driven by a 124% gain in Moderna ( MRNA ) following positive Phase 3 trial results for its melanoma vaccine developed with Merck ( MRK ). Basic Materials ( XLB ) also led the morning, as a surge in gold futures ( GC=F ) and gold miner stocks broadly rose. Here are some notable stocks that Yahoo Finance readers are viewing this morning: Micron ( MU ), Sandisk ( SNDK ), Marvell ( MRVL ), SK Hynix ( SKHY ), Broadcom ( AVGO ), Merck ( MRK ), and Alphabet ( GOOG , GOOGL )
AI 시장 분석
Despite declining US Treasury yields, tech-heavy selling resumed, leading to a drop in the Nasdaq. Conversely, the healthcare sector strengthened as Moderna's stock surged 124% following positive Phase 3 melanoma vaccine results. Additionally, a sharp spike in gold futures led gains in the basic materials sector. Investors should pay attention to tech weakness and the rotation into healthcare and commodities.
상승 영향
- Biotech — Moderna announced positive Phase 3 clinical results for the melanoma vaccine co-developed with Merck, causing its stock to surge 124% and driving strong buying momentum across the biotech sector.
- Commodities — Gold futures surged and gold mining stocks rose collectively, significantly improving the profitability of basic materials and commodity-related assets.
하락 영향
- Semiconductors — Major semiconductor stocks like Intel, AMD, and Broadcom declined simultaneously, leading tech-wide selling and exerting downward pressure on short-term performance and stock prices.
- Growth Stocks — Despite the positive factor of declining Treasury yields, tech-centric profit-taking emerged, acting as a direct downward pressure on major growth stock indices such as the Nasdaq.
DYAX 전담 분석
Although US Treasury yields declined due to the Treasury's buyback support for long-term bonds, selling pressure centered on semiconductor and tech stocks like Intel, AMD, and Broadcom put downward pressure on the Nasdaq index. Meanwhile, Moderna skyrocketed 124% due to the success of its melanoma vaccine co-developed with Merck, significantly boosting investor sentiment across the healthcare sector.
If tech weakness persists, valuation burdens across growth stocks may increase, but capital inflows into safe-haven assets like healthcare and gold provide defensive investment options. Key watchpoints ahead include the stabilization trend of Treasury yields, clinical results of individual companies, and earnings announcements.
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