2026年科技股迎来“证明之年”：是泡沫还是稳健标的？

Core Insights - The AI hype is growing, but concerns about market bubbles and the disruptive power of the technology are increasing as well [1] - Despite strong earnings from tech giants like Alphabet and Nvidia, overlooked sectors such as memory chips and hard drives are seen as better investment opportunities [1] - The sustainability of massive AI-related capital expenditures and the return on investment from large cloud computing companies are under scrutiny as the bull market in US stocks continues into its fourth year [1] Company-Specific Concerns - OpenAI's profitability is being questioned, particularly regarding its ability to fulfill a $300 billion cloud computing agreement with Oracle, leading to a 45% drop in Oracle's stock since its peak in September [2] - Oracle faces additional challenges, including high data center leasing costs, project delays, and rising debt levels, which have raised credit risk indicators to their highest since the financial crisis [2] - Other cloud providers like CoreWeave and Nebius Group have also seen significant declines in market value, with CoreWeave losing about two-thirds of its value since June and Nebius down over 42% from its October peak [2] Sector Performance - In 2025, investors identified new AI trading opportunities by tracking promised capital expenditures, with companies like SanDisk, Western Digital, and Seagate performing well in the S&P 500 [3] - Software stocks, particularly SaaS companies, have struggled due to fears of being disrupted by AI technologies like ChatGPT and Alphabet's Gemini, which could erode demand and pricing power [6] - The SaaS sector saw a 10% decline in the Morgan Stanley SaaS index, while broader software indices, including AI winners like Microsoft, rose by 5% [6] Valuation Trends - Despite concerns over high valuations, stocks like Palantir Technologies and Tesla have performed well, with Palantir's stock rising 146% and Tesla reaching a historical high, both maintaining high price-to-earnings ratios [9][12] - Analysts expect Palantir's revenue to grow by 43% in 2026 and 39% in 2027, while Tesla's sales are projected to increase by 13% in 2026 and 19% in 2027 [9][12] - The technology sector enters 2026 with high expectations and expensive valuations, necessitating companies to prove their growth potential to sustain stock price increases [12]