Multiple large-cap stocks experienced significant declines last week due to earnings misses and disappointing guidance. The top losers included Rambus (down 28.47%), Summit Therapeutics (down 27.82%), and Teradyne (down 17.85%), with notable declines also from Roblox, Spotify, and Robinhood. Weak financial results and lowered forward guidance across tech, fintech, and other sectors shook investor confidence.

Teradyne's stock surged over 15% as investors viewed a recent dip as a buying opportunity. The company reported that AI now drives 70% of its revenue (up from 60%), with 87% year-over-year revenue growth. However, second-quarter guidance disappointed with a sequential revenue decline expected, though analysts from Goldman Sachs and JPMorgan maintained positive outlooks, citing natural order timing lumpiness rather than fundamental weakness.

The Dow Jones surged 1.5% driven by industrial and healthcare stocks, while mega-cap tech faced pressure from concerns over AI capital spending. Meta and Microsoft declined on capex worries, but Alphabet gained on enterprise AI wins. Industrials like Caterpillar, Quanta Services, and Carrier rallied on data-center infrastructure demand. The S&P 500 gained 0.5% while the Nasdaq 100 remained flat.

Teradyne stock plunged 19.4% despite beating Q1 earnings expectations with 87% revenue growth and 241% EPS surge. The sell-off was driven by softer-than-expected margin guidance, a 2.5 percentage-point decline in gross margins, and expected lower second-half revenue due to lumpy quarterly results from customer concentration and fab build-out timing. The stock had already doubled in early 2026 and trades at a lofty 45x forward earnings.

U.S. stocks traded mixed on Wednesday as crude oil rallied 5-6% amid Iran tensions, pushing Treasury yields above 4.4%. The Federal Reserve is expected to hold rates steady at 3.75%, while investors await earnings from major tech companies. Big Tech stocks fell 1-2% on reports that OpenAI missed revenue targets, raising questions about AI spending sustainability.

Michael Burry disclosed new short positions on semiconductor stocks, purchasing January 2027 puts on the SOXX semiconductor ETF at a $330 strike price, implying a 27% drawdown. The disclosure coincided with SOXX snapping its historic 18-day winning streak with a 2% decline on Monday. Burry attributes the rally to technical factors rather than fundamentals, noting the index was trading 43% above its 200-day moving average with RSI near 85. The selloff occurred as seven semiconductor companies prepare to report earnings this week.

The Ark Autonomous Technology & Robotics ETF (ARKQ) has delivered 17.53% average annual returns over 11 years, outpacing the S&P 500's 10% long-term average. Investing $500 monthly could grow to $1 million in 22 years if returns continue. However, the actively managed tech ETF carries risks due to its narrow focus on 30-50 companies and tech sector volatility.

ARK Invest argues that modern defense stocks should focus on space infrastructure, semiconductors, drones, and AI platforms rather than traditional defense contractors. The firm's ARKX ETF targets companies in launch technology, sensing, AI, software and networks, positioning space as the backbone of future national security rather than capex-heavy platforms like tanks and fighter jets.

Aehr Test Systems stock declined ~15% following a broader AI sector sell-off triggered by AMD's guidance of a sequential sales decline in Q1 2026, despite 32% year-over-year growth. However, the author argues the market is overreacting, noting that Teradyne reported strong AI-related demand the day prior, suggesting continued momentum in semiconductor testing demand that could benefit Aehr's wafer-level burn-in solutions.

Palantir Technologies and Teradyne reported strong fourth-quarter results that exceeded Wall Street expectations, signaling robust demand for AI-related products and services. Since both companies are Nvidia partners and customers, their positive performance is viewed as a favorable indicator for Nvidia ahead of its earnings report on February 25, 2026.

U.S. stock futures advanced on Tuesday following Monday's positive close, with major indices gaining ground. Gold and silver rebounded while crude oil declined. Key movers included Palantir Technologies jumping 10.84% on strong earnings, Teradyne surging 22.23% with impressive guidance, and SanDisk gaining 4.24% on blockbuster results. A U.S.-India trade agreement lowering tariffs and analyst forecasts for continued bull market momentum supported sentiment.

Bank of America semiconductor analyst Vivek Arya identifies five small- and mid-cap chip stocks positioned for outperformance in 2026, driven by AI infrastructure spending, rising chip complexity, and aerospace/defense demand. The stocks include Credo Technology (AI connectivity leader), MKS Inc (wafer equipment), Advanced Energy Industries (AI power demand), Teradyne (chip testing), and MACOM (optics and defense exposure).