A bubble is likely forming when five factors converge: a major invention ('Eureka moment'), cheap credit ('easy money'), favorable government policy ('government largesse'), strong economic conditions, and an external stimulant like a crisis or war.

Bubbles are created when assets like startup equity are valued astronomically, creating immense perceived wealth. However, this "wealth" is not money until it's sold. A crash occurs when events force mass liquidation, revealing a scarcity of actual money to buy the assets.

A practical definition of a bubble is when investor enthusiasm pulls all potential future cash flows and upside into the present-day price. This results in an asset that offers zero forecasted returns over a long period, making it a foolish investment.

A recurring theme in every historical market bubble is the belief that current events are unique, justifying inflated valuations and risky investments. Recognizing this narrative is a key behavioral signal for investors to exercise caution.

A key indicator of a bubble's final stage, observed only four times in U.S. history (1929, 1972, 2000, 2021), is when speculative, high-beta stocks that led the rally start to fall sharply while blue-chip indices continue to grind higher. This market divergence is a 'primal scream' that a crash is imminent.

To understand any market or economic event, view it through the lens of five major forces: 1) the debt/money cycle, 2) internal political order/disorder, 3) the international world order, 4) acts of nature/climate, and 5) technology. Their convergence often creates a "perfect storm."

A market enters a bubble when its price, in real terms, exceeds its long-term trend by two standard deviations. Historically, this signals a period of further gains, but these "in-bubble" profits are almost always given back in the subsequent crash, making it a predictable trap.

Contrary to intuition, widespread fear and discussion of a market bubble often precede a final, insane surge upward. The real crash tends to happen later, when the consensus shifts to believing in a 'new economic model.' This highlights a key psychological dynamic of market cycles where peak anxiety doesn't signal an immediate top.

Market bubbles evolve through predictable psychological stages. Phase one is buying an asset for its fundamental value. Phase two is using debt and leverage to acquire more of the appreciating asset. Phase three is pure speculation where investors, driven by greed, no longer care about the asset itself, only its potential for quick profit.