NEW YORK — Wall Street endured one of its most severe trading sessions in the last 18 months, as a wave of risk aversion sent shockwaves through global markets. The Nasdaq Composite, dominated by technology giants, collapsed under the pressure, vaporizing over $2.5 trillion in market capitalization from tech and semiconductor stocks in a single day.

AI titans take the hardest hit as market sentiment shifts

The once unstoppable rally of the artificial intelligence sector faced a brutal reckoning as investor confidence evaporated. Leading AI hardware providers saw dramatic declines:

• Nvidia, the undisputed leader in AI processing chips, saw its stock plummet by up to 9%, erasing tens of billions in market value within hours. The drop followed concerns over whether its sky-high valuations could be sustained amid slowing AI infrastructure investments.
• AMD and Broadcom were not spared, with AMD’s shares falling between 6% and 17% as investors reassessed their exposure to AI chip demand.
• The semiconductor supply chain faced a bloodbath, with Micron Technology (-17%), Western Digital (-13%), and SanDisk (-22%) leading the declines. The sell-off reflected deepening skepticism about near-term demand for data center components.

The Philadelphia Semiconductor Index (SOX) crashed by more than 12%, wiping out months of gains and signaling a dramatic shift in investor sentiment toward the chip sector.

Major US indices collapse under the weight of the tech rout

The downturn spread rapidly across Wall Street, with all major indexes posting steep losses:

• Nasdaq Composite: Led by mega-cap tech stocks, the index suffered a historic collapse.
• S&P 500: Dropped more than 2.6% to 4.3%, marking its worst performance of the year.
• Dow Jones Industrial Average: Fell more than 3%, dragged down by industrial and tech-heavy components.
• VIX Index (Fear Gauge): Surged by 33% to surpass 60, reflecting a surge in market volatility and widespread panic among portfolio managers.

Three key triggers behind the market meltdown

The collapse was fueled by a convergence of critical factors that shattered investor confidence:

1. Doubts over AI’s return on investment

Investors are increasingly questioning the financial viability of AI investments. Despite massive capital inflows into AI infrastructure—ranging from high-performance computing to energy-intensive data centers—the anticipated revenue streams have failed to materialize at the pace expected. This disconnect between lofty valuations and lagging profitability has triggered a mass exodus from AI-linked stocks.

2. Regulatory headwinds for data centers

Growing political and regulatory uncertainty in the United States has cast a shadow over the future of data center expansion. Proposed restrictions on energy consumption and grid capacity, combined with potential policy shifts following recent elections, have raised concerns about the sustainability of current growth trajectories in chip demand.

3. Algorithmic trading and forced liquidations

After months of relentless gains, automated trading systems and hedge funds triggered cascading sell-offs as key technical support levels were breached. The use of stop-loss orders and dynamic hedging strategies exacerbated the downturn, transforming a routine market correction into a full-blown liquidation spiral.

Global markets reel from the US tech shock

The impact of the US tech sell-off was felt worldwide, with Asian markets bearing the brunt of the fallout:

• Nikkei 225 (Tokyo): Plunged by 6% as investors priced in tighter financial conditions.
• Kospi Index (Seoul): Collapsed by more than 8%, dragged down by major chipmakers including Samsung and SK Hynix.

As analysts debate whether this represents a healthy technical correction or the beginning of a deeper unwinding of the tech bubble, investors remain on edge, awaiting signals from central banks and upcoming earnings reports that could either stabilize or further destabilize the market.

By Mariama Hamani — Journalist