The stock market endured its toughest week in months, with a sharp Friday sell-off erasing early gains and leaving all the major averages in negative territory. The S&P 500 fell 2.6%, snapping a nine-week winning streak, while the Nasdaq Composite dropped 4.7% as technology stocks surrendered a significant portion of their recent advance. The DJIA proved relatively resilient, slipping just 0.3%, but still finished lower for the week.
At the heart of the decline was a dramatic reversal across many of the market's highest-flying technology and AI-related names. Earlier in the week, investors remained enthusiastic about the AI infrastructure theme, fueling strong gains in semiconductor, networking, optical, and software-related stocks. However, that leadership became increasingly fragile as the week progressed. A disappointing market reaction to Broadcom's earnings report on Thursday added to the pressure, sparking a sharp sell-off across semiconductor stocks and raising questions about whether expectations throughout the AI supply chain had become too elevated. By Friday, a stronger-than-expected May employment report reignited concerns that the Federal Reserve may need to keep monetary policy restrictive for longer, driving Treasury yields higher and triggering widespread selling across growth-oriented areas of the market.
The information technology sector fell 5.4% for the week, making it the worst-performing S&P 500 sector outside of the consumer discretionary sector (-6.2%). Semiconductor stocks experienced particularly volatile trading.
The weakness extended beyond semiconductors and software. Mega-cap growth stocks that had powered much of the market's advance in recent months also came under pressure. Several of the market's largest technology and internet companies experienced bouts of profit-taking as investors reassessed valuations amid rising interest-rate expectations and growing volatility.
While technology struggled, investors increasingly sought shelter in more defensive corners of the market. Health care (+2.3%), real estate (+1.5%), utilities (+1.3%), and consumer staples (+1.0%) all finished the week higher. These groups benefited from rotational buying as investors reduced exposure to higher-beta growth stocks and gravitated toward sectors perceived as more stable amid rising market uncertainty.
Energy was another notable outperformer, gaining 2.5% despite significant volatility in oil markets throughout the week. Crude prices were driven by a rapidly evolving geopolitical backdrop involving Iran, Israel, and Lebanon, producing several large daily swings. Although oil prices eventually finished well below midweek highs, energy stocks still managed to outperform most areas of the market.
Market participation also deteriorated considerably as the week unfolded. The Russell 2000 fell 2.9%, while the S&P Mid Cap 400 lost 0.9%. Although both indexes showed periods of relative strength during the middle of the week, rising Treasury yields and worsening risk appetite weighed on smaller-cap stocks, particularly following Friday's employment report.
Beneath the surface, the week illustrated a meaningful shift in investor sentiment. Early optimism surrounding artificial intelligence, easing geopolitical concerns, and resilient economic data initially supported additional record highs for the major averages. However, stronger economic reports and a hotter labor market ultimately shifted attention back toward inflation risks and the possibility of higher interest rates for longer. That change in focus proved especially damaging for the market's most richly valued growth stocks.
The increase in volatility reflected that shift. Ultimately, the week's decline was less about broad economic deterioration and more about a significant repricing of growth expectations. As Treasury yields moved higher and rate-cut hopes continued to fade, investors aggressively reduced exposure to the same technology and AI-related areas that had previously driven the market to record highs. The result was a sharp pullback across major growth sectors, a resurgence in defensive leadership, and the market's first meaningful setback in several months.
DJIA: -0.3% week-to-date
S&P Mid Cap 400: -0.9% week-to-date
S&P 500: -2.6% week-to-date
Russell 2000: -2.9% week-to-date
Nasdaq Composite: -4.7% week-to-date