Have you ever watched a stock price shoot up like a rocket, feeling a mix of excitement and fear? Excitement because everyone around you seems to be making quick money, and fear because you worry you are missing out on a lifetime opportunity. This emotional roller coaster is the classic trap of a market bubble.

Market bubbles are not new. From tulip bulbs centuries ago to the early days of internet startups, human psychology never changes. Economist Hyman Minsky mapped out a timeless template for how every bubble forms, peaks, and inevitably pops. By understanding these phases, you can protect your hard-earned savings from sudden crashes.

The Five Phases of a Bubble

Every major market bubble in history moves through the exact same five stages. Recognizing which stage you are in is the ultimate defense mechanism for a retail investor.

• Displacement: A genuine new technology, policy, or business model arrives and changes the world (like the birth of the internet or solar power).
• Boom: Smart, early investors enter the space. Prices begin to rise steadily as real business profits start trickling in.
• Euphoria: Rational thinking stops. Everyone from your neighbor to your driver is talking about the asset. Valuations no longer matter because 'this time is different.'
• Profit-Taking: Institutional investors quietly sell their shares and exit. They realize that the market prices have completely decoupled from economic reality.
• Panic: A minor trigger starts a sell-off. Because the exit door is incredibly small, everyone rushes to sell at once, and the price crashes back to earth.

How to Spot the Euphoria Phase Numerically

During the Euphoria phase, buyers justify absurd prices by pointing to future potential. But you can easily calculate how much of a stock's price rise is due to actual business growth versus pure speculative hype. This is known as analyzing multiple expansion.

Let us take a fictional Indian company, Bharat Solar Systems, and compare its normal phase to its euphoria phase to see where the price appreciation is actually coming from.

Why This Matters for Your Portfolio

When 90% or more of a stock's price rise is driven by multiple expansion rather than earnings growth, you are in the danger zone. You are relying on the 'Greater Fool Theory'—the hope that someone else will buy the stock from you at an even more absurd price tomorrow.

When market sentiment shifts, P/E multiples compress much faster than earnings can grow. A stock with a P/E of 150 can easily crash by 80% just by returning to its historical average P/E of 15, even if the underlying business remains highly profitable.

You can easily spot these warning signs on stock-analyze.com by checking the historical P/E chart on any stock's analysis page to see if the current valuation multiple has decoupled from its long-term average.