SoftBank Group Corp. shares fell as much as 11 percent after the company reported its first net loss in nearly two years, driven by a $3.7 billion writedown on U.S. data-center projects and declining valuations across its artificial intelligence holdings.

The data-center writedown reflects a reassessment of infrastructure investment returns during shifting demand forecasts. Simultaneously, SoftBank's extensive AI portfolio—concentrated in high-growth companies that commanded premium valuations during the 2023-2024 expansion—faced substantial markdowns as investor appetite for unprofitable AI plays cooled.

The loss marks a reversal for the Vision Fund's aggressive bet-on-disruption playbook. While early positions like Alibaba generated outsized returns, the current cycle exposes the cyclical risk inherent in venture-scale technology investing at high valuations.

The dual headwind—specific operational challenges in data-center assets combined with sector-wide AI multiple compression—suggests SoftBank faces a structural recalibration rather than a temporary cyclical dip. The company's ability to stabilize valuations and demonstrate a path to renewed profitability will determine near-term investor confidence.