Why Do Stocks Fall When Bond Yields Rise? — The Brake on AI Stock Prices

What's the Connection Between Interest Rates and Stocks?

Whenever news breaks that bond yields have risen, stocks — especially AI and growth stocks — almost always fall. Why? Understanding this relationship makes financial news much easier to follow.

First, Let's Understand What a Treasury Bond Is

A Treasury bond is essentially an IOU the U.S. government issues when it borrows money. For example, the government might promise: "In 10 years, we'll pay back your principal plus 4.5% interest." That interest rate is the Treasury yield. U.S. Treasuries are considered the safest investment in the world.

The Present Value of 'Future Earnings' Shrinks

AI companies may not earn much money right now, but their stock prices are high because of expectations of enormous future profits. When interest rates rise, those future earnings are worth less in today's money. For example, at a 2% rate, ₩1,000,000 three years from now is worth about ₩940,000 today. At 5%, that same ₩1,000,000 drops to roughly ₩860,000 in today's terms. The same logic applies to the projected future earnings of AI companies.

Why Do AI Stocks Fall the Hardest?

Companies like Samsung Electronics earn solid profits right now. So even when rates rise, their current earnings cushion the blow. But AI startups and highly valued big-tech firms have most of their earnings projected far into the future. The higher interest rates go, the more that future value gets discounted — which is why they fall harder.

What Can You Do When Rates Rise?

Experts often suggest focusing on companies that earn money right now when rates are high — firms with strong dividends, stable consumer-goods businesses, or bonds themselves. Conversely, when rates start to fall, AI and growth stocks tend to rebound strongly.

Why AI Stocks Fell Today

Strategist Ed Yardeni cut his Nasdaq outlook because of rising Treasury yields. If the Fed raises rates again soon, yields could face additional upward pressure. That's why AI stock investors are holding their breath waiting for the next FOMC decision.