The S&P 500 has stretched its winning streak to eight consecutive weeks, posting a 27.43% gain over the past year and an 8.92% advance year-to-date. This remarkable rally is propelled by five core catalysts: AI technology breakthroughs, IPO market reopening, corporate earnings exceeding expectations, easing geopolitical tensions, and broadening market breadth — all reinforced by the characteristic “shallow dips, fast recoveries” rhythm of the Trump bull market.
1. AI Technology Breakthroughs: Tech Giants’ Earnings Ignite Market Frenzy
The AI boom stands as the most powerful engine behind this bull market, with NVIDIA Corporation (NVDA)‘s exceptional quarterly results acting as a major market catalyst. For Q1 FY2027, NVIDIA reported $81.61 billion in revenue (up 85.2% year-over-year), with its Data Center segment contributing $75.25 billion and networking revenue surging nearly 199%. CEO Jensen Huang described “the buildout of AI factories as the largest infrastructure expansion in human history”. The company provided guidance for the next quarter at $91.0 billion ±2% and its board authorized an $80 billion share repurchase program.
Microsoft Corporation (MSFT) disclosed its AI business is running at an annualized revenue rate of $37 billion (up 123% year-over-year), with commercial remaining performance obligations reaching $627 billion. Apple Inc. (AAPL) achieved its best March quarter ever with $111.2 billion in revenue, driven by strong demand for the iPhone 17, and announced a new $100 billion share repurchase program. Intel Corporation (INTC) has seen its stock soar 221.14% year-to-date after its Xeon 6 processor was selected as the host CPU for NVIDIA’s DGX Rubin NVL8 systems, emerging as a new beneficiary of AI capital expenditure expansion.
2. IPO Market Reopening: AI Titans Enter to Provide New Investment Targets
IPO plans from SpaceX and OpenAI have injected fresh vitality into the market. SpaceX filed its S-1 with the SEC on May 20, reflecting the retrospective combination of xAI, which was acquired by SpaceX effective February 2, 2026. Sources indicate that OpenAI, the parent company of ChatGPT, could file for an IPO as early as this week. The listing of these two top private AI assets offers new allocation options for institutional funds that have long chased the “Magnificent Seven” tech stocks, potentially encouraging more AI companies (such as Anthropic) to go public and unlocking substantial financing to deepen the bull market.
3. Corporate Earnings Exceeding Expectations: Strong Fundamental Support
S&P 500 companies are on track to report 13% earnings growth for Q1 2026, marking the sixth consecutive quarter of double-digit growth. Among companies that have reported so far, 88% have beaten earnings estimates, well above the five-year average of 78%. The information technology sector has particularly excelled, with projected earnings growth of approximately 45% for the quarter. Taiwan Semiconductor Manufacturing Company (TSMC) reported a 58% jump in Q1 profits and forecast full-year revenue growth exceeding 30%. Notably, tech stock valuations have actually declined, with price-to-earnings ratios compressing from around 32 to about 20, boosting investor confidence.
4. Easing Geopolitical Tensions: Expectations for Swift Resolution of Iran Conflict
De-escalation in the Middle East has provided significant market support. Most investors are betting the Iran conflict will end soon, with President Trump stating the war is “very close to over”. A ceasefire was announced on April 8, and while its duration remains uncertain, the market has already priced in peace prospects. Regarding oil prices, the national average for gasoline in the U.S. reached $4.11 per gallon in mid-April (the highest since 2022), but fell 7 cents to $4.04 within a week after the ceasefire announcement and has since dropped further to $4.02. Energy Secretary Chris Wright stated that if the Strait of Hormuz remains open and tensions ease, gasoline prices could return to below $3 per gallon later this year or in 2027.
5. Broadening Market Breadth: More Solid Foundation for Bull Market
Upward momentum has spread from a handful of tech giants to more companies and sectors, indicating a healthier and more sustainable bull market. Data from U.S. Bank shows that small-cap stocks have risen more than 60% from their April 2025 lows. The S&P 500 Equal Weight Index — which gives every company the same weighting instead of letting Apple and NVIDIA dominate — has outperformed the regular S&P 500 this year. Wall Street has also delivered impressive results, benefiting from strong trading revenues and an active M&A and IPO market.
Conclusion
CNBC host Dominic Chu noted that this bull market has displayed a typical rhythm of “shallow pullbacks and rapid rebounds,” making it difficult for bears to maintain downward pressure. Sustained enthusiasm for AI continues to boost stocks, while institutional demand for new investment targets has jointly driven the S&P 500’s eight-week winning streak. Despite complex global conditions, the stock market has shown an upward trend over the long term, primarily because companies adapt, innovate, and generate profits amid various forms of chaos.