# AI-Driven Bull Market Hits 4-Year Mark

> US stock market nears 4-year bull run fueled by AI spending but faces rising risks.
- Title: AI-Driven Bull Market Hits 4-Year Mark · New York Post
- Summary: US stock market nears 4-year bull run fueled by AI spending but faces rising risks. The S&P 500 approaches its four-year bull market high driven by AI…
- Keywords: s&p 500, ai spending, federal reserve, treasury yields, tech concentration, bull market, nvidia, market capitalization, news, entertainment, AI-Driven, Bull
- Source: New York Post — https://nypost.com/2026/10/09/business/stock-bull-market-nears-4-year-anniversary-thanks-to-ai-spending
- Published: 2026-10-09T15:13:20+00:00
- Read time: 1 min
- Topics: s&p 500, ai spending, federal reserve, treasury yields, tech concentration, bull market, nvidia, market capitalization, news, entertainment
## US Bull Market Nears 4-Year Anniversary
The S&P 500 trades near record highs ahead of Oct 12, marking four years since the index’s closing low for this cycle.
## AI Spending Powers Market Growth
Corporate profit growth is lifted by AI expansion spending and a solid economic backdrop, driving investor optimism.
## Bull Market Ranks Eighth Longest Since WWII
The current S&P 500 bull run ranks as the eighth-longest since World War Two, with an 117% gain.
## AI Dominates Market Performance
The launch of ChatGPT occurred about a month after the bull market began, with tech and AI stocks driving gains.
## Nvidia Market Capitalization Soars
Nvidia’s market value has surged from $286 billion to $5.8 trillion since Oct 12, 2022, making it the world’s largest company.
## Tech Concentration Risks Rise
The top 10 S&P 500 companies now weigh 40% of the index, up from 28% in October 2022, creating concentration risk.
## Fed Rate Hikes Threaten Market Momentum
Rising US Treasury yields and Federal Reserve rate hikes could slow economic growth and trigger market volatility.
## Key takeaway

The S&P 500 approaches its four-year bull market high driven by AI spending, with risks from Fed rate hikes and tech concentration.