A recent analysis frames the AI-driven market rally through a simple yet powerful concept called the 'Gravity Rules'.
At its core, the AI boom is a self-reinforcing loop. It starts with a foundational belief, supported by research like the 'Scaling Laws' papers, that more computing power leads to better AI performance. This belief has sparked an unprecedented spending race among Big Tech companies, who are pouring hundreds of billions into AI infrastructure. This massive spending, or capex, is only possible because capital—from both public bond markets and private credit—has been widely available to fund it.
Interestingly, much of this capital flows in a circle. For instance, Microsoft invests billions in OpenAI, which in turn spends that money on Microsoft's Azure cloud services, boosting its revenue. Similarly, Nvidia invests in a company like CoreWeave, a large customer that then raises debt to buy more of Nvidia's GPUs. This creates a powerful flywheel, where investment directly fuels reported sales, pushing stock prices higher and attracting even more capital.
However, this seemingly perpetual motion machine has two powerful brakes: interest rates and inflation. First, think of interest rates as gravity. Just as gravity pulls objects to the ground, higher interest rates pull asset valuations down by increasing the cost of borrowing and offering safer returns elsewhere. The U.S. 10-year Treasury yield, a key benchmark, is currently below the 5% level considered a 'danger zone', but it's been volatile, reminding everyone that this gravitational pull can strengthen quickly.
Second is sticky inflation. This refers to persistent price increases in services that don't fall easily. Current data shows this measure is hovering near a critical mid-3% threshold. If sticky inflation remains high, it could force the Federal Reserve to keep interest rates elevated for longer, applying constant pressure on the AI flywheel.
For now, the rally continues because these brakes are not fully engaged. Capital is still flowing, and the market is concentrated in a few big winners. But the situation is fragile. If rates and inflation cross their critical thresholds, the 'gravity' that has been held in check could reassert itself, bringing the high-flying AI market back down to earth.
- Capex: Short for capital expenditure, which are funds used by a company to acquire, upgrade, and maintain physical assets like property, buildings, or equipment.
- Sticky Inflation: A type of inflation that is slow to change. It typically applies to the prices of services, which are less volatile than goods like food or energy.
- 10-year Treasury yield: The interest rate the U.S. government pays to borrow money for 10 years. It is a benchmark for interest rates on many other types of loans, such as mortgages.