NDR Signals

NDR: Do bubbles end when rates rise?

Written by Ned Davis Research | Aug 21, 2026, 12:34:01 PM

During NDR's recent webinar, "AI Debate: Bubble, Correction, or Opportunity?", Joe Kalish, Chief Global Macro Strategist, was asked a straightforward question: "Do bubbles end when rates rise?" While rising interest rates have frequently coincided with the final stages of major market bubbles, history suggests the relationship is more nuanced.

An examination of five significant bubbles over the past 100 years shows that rates and yields generally moved higher into the peak, and in some instances continued rising even after the bubble had burst.

Looking across several decades of market history, there have been numerous examples where a relatively small group of stocks drove a disproportionate share of market returns. The Nifty Fifty stocks of the early 1970s, Japanese equities in the late 1980s, technology stocks during the dot-com boom, and large-cap U.S. growth companies following the Global Financial Crisis each enjoyed extended periods of dominance. In some cases, leadership persisted much longer than investors expected; in others, elevated valuations and changing economic conditions ultimately led to a shift in market leadership.

The key lesson is that leadership rarely disappears overnight. Companies that consistently deliver superior earnings growth and maintain strong competitive positions can remain market leaders for extended periods. However, history also demonstrates that no leadership trend lasts indefinitely. Rather than focusing solely on the market's current winners, investors may benefit from assessing whether the underlying fundamentals continue to support prevailing expectations and whether signs of broader market participation are beginning to emerge.
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