US technology stocks have entered a correction, marked by the Nasdaq 100 index declining more than 10% from its recent peak. This downturn is primarily driven by an accelerating sell-off in the artificial intelligence sector, particularly impacting semiconductor companies. Investors are increasingly concerned about the high capital expenditure by AI firms and the potential for these investments to erode future returns, with some analysts noting worries about "artificially inflated demand for AI."

The sell-off has seen significant drops across the chip sector. Nvidia Corp. tumbled 4.99%, Advanced Micro Devices and Teradyne both dropped more than 5%, and Micron Technology shed 2.25%. In Asian markets, SK Hynix sank 14.7% and Samsung fell over 13%, while Japanese chip equipment makers like Nikon Corp. and Tokyo Electron Ltd. slid more than 9%. Taiwanese chip giant TSMC also took a hit, contributing to Taipei's market fall of over 4%. This widespread decline underscores deepening doubts over AI spending, returns, and valuations, rather than fading concerns.

Several factors are contributing to this sentiment shift. Alphabet Inc.'s increased capital spending forecast, reaching as much as $205 billion for the year, reignited concerns about fiscal discipline in the AI race. Additionally, a report from The Information about a Chinese state-backed company mass-producing immersion deep ultraviolet lithography machines has raised competitive threats and weighed on the sector. This week also features critical earnings reports from major tech companies, including Microsoft Corp., Meta Platforms Inc., Apple Inc., and Amazon.com Inc., which investors will scrutinize for signs of justified AI spending and monetization metrics.

Alongside the tech sell-off, the broader market saw mixed reactions. US stocks closed mixed, with some industrial averages like the Dow Jones Industrial Average rising 0.51% while the Nasdaq Composite Index shed 0.18%. Oil prices plunged significantly, with West Texas Intermediate crude falling 7.5% and Brent crude dropping 8.7%, easing some near-term cost pressures. Investors are also closely watching the Federal Reserve's policy announcement, with some analysts even forecasting a surprise rate hike to tackle inflation, further contributing to market uncertainty.

The current market environment is characterized by a rotation out of semiconductor and AI infrastructure stocks and into other sectors like software. Despite strong Q2 earnings forecasts, with approximately 86% of S&P 500 companies beating estimates so far, a bullish response to strong "Magnificent Seven" earnings is not guaranteed, especially if AI spending levels continue to raise eyebrows. Geopolitical events and oil prices are also identified as major wild cards, adding to the potential for choppiness in the markets this week.