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Nvidia Faces Historic Market Loss As DeepSeek Dents Confidence In AI’s Future

Nvidia experienced the largest single-day market cap drop in history on Monday, as its stock tumbled by 17%, shedding nearly $600 billion in value. This staggering loss is directly linked to a new development in the AI space—DeepSeek, a Chinese AI firm that unveiled its version of ChatGPT, raising concerns over the cost-efficiency and competitive positioning of U.S. AI companies.

Key Details

Nvidia’s shares experienced a severe decline, marking its worst daily percentage drop since March 2020, during the initial shock of the COVID-19 pandemic. On Monday, Nvidia lost a record-breaking $589 billion in market capitalization, more than doubling the previous one-day loss of $279 billion in September 2024. To put it into perspective, this is significantly more than Meta’s $251 billion market cap loss in February 2022.

As a result, Nvidia’s market valuation dropped from $3.5 trillion to $2.9 trillion, slipping behind Apple and Microsoft as the world’s most valuable company. Nvidia’s dramatic fall led a broader retreat in U.S. stocks, with the S&P 500 losing 1.5% and the Nasdaq dropping 3.1%. Other major players in the AI industry, such as chipmakers Arm and Broadcom, alongside Oracle, saw their stocks plummet by at least 10%.

The DeepSeek Effect

The cause of Nvidia’s catastrophic loss lies in DeepSeek’s release of its large-language model, which has cast doubt on the continued dominance of U.S. companies in generative AI. Initially, this might not seem like a negative development for Nvidia, as DeepSeek’s model was also powered by Nvidia’s powerful graphics processing units (GPUs), just like many other AI technologies. However, DeepSeek revealed that it spent just $5.6 million on Nvidia’s technology to develop its model. While experts believe this figure is likely a significant underestimation, it still calls into question the very foundation of Nvidia’s meteoric stock rise.

In recent years, Nvidia’s profits have skyrocketed, with projections indicating net profits could soar from $4.8 billion in 2022 to $66.7 billion in 2024, largely due to the soaring demand for its high-priced GPUs, which can cost up to $25,000 each. U.S. tech giants such as Meta, Tesla, and OpenAI have been among Nvidia’s biggest customers. However, if companies like these can replicate DeepSeek’s cost-efficient approach by using cheaper GPUs, Nvidia could face significant challenges in maintaining its market dominance.

As Ed Yardeni of Yardeni Research pointed out, this shift could be an unwelcome development for Nvidia.

Surprising Statistic

Nvidia’s near-$600 billion market cap loss on Monday exceeds the market values of all but 13 American companies, surpassing industry giants like UnitedHealth, Exxon Mobil, and Costco.

CEO’s Losses

Nvidia CEO Jensen Huang saw his wealth take a massive hit, losing $21 billion in a single day. His net worth dropped from $124.4 billion to $103.1 billion, according to Forbes estimates. Huang remains the largest individual shareholder in Nvidia, owning a 3% stake in the company.

Nvidia’s colossal market cap loss highlights the growing uncertainties in the AI sector, as DeepSeek’s cost-effective alternative to American AI models threatens to disrupt the industry’s balance. With AI becoming an increasingly competitive and global field, Nvidia’s future may hinge on how it adapts to these emerging challenges.

Portugal’s Housing Market Sets New Highs As Prices Continue To Climb

Portugal’s housing market has entered another record-setting phase, with prices reaching an all-time high in September and reinforcing the country’s position among Europe’s hottest property markets.

According to the Idealista price index, home prices rose 7.9% year on year in September and advanced 0.6% from August. Based on median values, the cost of buying a home climbed to 3,228 euros per square metre nationwide.

Regional Price Growth Remains Uneven

The sharpest increases were concentrated in several district capitals and autonomous regions. Vila Real led the country with a 17.8% annual rise, followed by Leiria at 17.6%, Beja at 14.4%, Faro at 14.3% and Guarda at 14%.

Among the regions, Centro posted the strongest overall growth. At the other end of the spectrum, prices rose more modestly in Aveiro (9.3%), Setúbal (9.1%), Porto (9%), Castelo Branco (9%), Ponta Delgada (7.1%), Funchal (5.3%) and Lisbon (4.4%).

Lisbon remains the country’s most expensive city for buyers, with a median price of 6,256 euros per square metre. The wider Lisbon region is also the costliest area in Portugal to purchase housing, with a median price of 4,501 euros per square metre.

Portugal Leads The European Union In Price Growth

The surge is not limited to the domestic market. Portugal also posted the strongest house price growth in the European Union in the second quarter of 2026, according to the latest Eurostat data.

Eurostat said Portugal recorded a 16.5% increase compared with the same quarter a year earlier, ahead of Bulgaria at 15.5% and Lithuania at 14.3%. By contrast, Finland, Luxembourg and France were the only member states where prices declined.

Across the bloc, housing prices rose 4.0% in the euro area and 4.7% in the EU year on year in the second quarter of 2026. On a quarterly basis, prices increased by 1.1% in the euro area and 1.2% across the EU.

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