Micron and South Korean chipmaker SK Hynix have become the latest trillion-dollar companies as investor appetite for memory chips drives the AI rally. Goldman Sachs raised its S&P 500 year-end target to 8,000, citing semiconductor profit growth. The focus has shifted from AI processors to high-bandwidth memory chips essential for advanced AI models.

Micron shares have risen roughly threefold this year after a 20 percent rally, while SK Hynix jumped over 1,000 percent in the past twelve months. The Trump administration has embraced Micron, with Trade Representative Jamieson Greer visiting its Virginia plant and President Trump calling the company great after its pledge to invest up to $100 billion in U.S. operations. Officials are considering tariffs on chips to bolster domestic production.

However, corporate enthusiasm for AI spending faces reality checks. Companies' AI token expenditures have increased 13 times since January 2025, creating sticker shock. Uber's chief technology officer admitted blowing through their annual AI budget in months. This 'tokenmaxxing' trend, encouraged by executives like Nvidia's Jensen Huang, sees engineers competing to maximize token usage.

Geopolitical tensions threaten the chip boom. China is investing heavily to close the manufacturing gap with South Korea, while Samsung narrowly avoided supply chain disruption after workers threatened strikes. Employees in Samsung's chip division secured roughly $400,000 bonuses tied to AI chip profits, highlighting the sector's intense competition and labor demands.

The memory chip surge reflects genuine demand for AI infrastructure, but sustainability depends on managing costs and navigating geopolitical headwinds.