Economic and Investment Principles

Success is achieved by writing down decision-making criteria to identify cause-effect relationships and patterns that recur over time.
Principles translate experience into actionable mechanics that remain valuable across different times and circumstances.
Systemized decision rules should be timeless and universal, tested across multiple eras and countries.

The economy functions as a perpetual motion machine driven by four major forces: productivity, the short-term debt cycle, the long-term debt cycle, and politics (internal and external).
Productivity: The long-term evolution of output per man-hour which raises living standards over time.
Short-Term Debt Cycle: A business cycle typically lasting $7\text{ to }10$ years. It is driven by central banks managing credit to balance economic activity and inflation.
Long-Term Debt Cycle: The accumulation of shorter cycles that eventually reaches a limit when interest rates hit $0$ . This necessitates quantitative easing (printing money and buying financial assets).
Three Equilibriums:
1. Debt growth must stay in line with income growth required to service the debt.
2. Economic activity levels must align with capacity (not too high or too low).
3. The hierarchy of returns must be maintained: Equities > Bonds > Cash, adjusted by appropriate risk premiums.

Wealth Gap and Populism: Stagnant real income growth for the bottom $60\%$ since $1980$ and a wealth gap where the top $0.1\%$ has a net worth nearly equal to the bottom $90\%$ have fueled populism on the left and right.
Global Conflict Cycles: Geopolitics follows a pattern where a rising power (China) challenges an existing power (The United States). Status as a reserve currency is driven by innovation, education, and competitiveness, specifically in technology.
Historical Precedents: Current conditions are comparable to the period between $1929$ and $1932$ and the subsequent tightening in $1937$ .

Theoretical Value: The present value of future cash flows, while actual price is determined by the total spending divided by the quantity of goods sold.
Beta vs. Alpha: Beta represents intrinsic asset class behavior relative to the environment (growth and inflation). Alpha is a zero-sum game of taking value from others.
The Holy Grail of Investing: Finding $15$ or more good uncorrelated return streams. This diversification can reduce portfolio risk by nearly $80\%$ without materially reducing the expected return.
Risk Balancing: Asset allocation must account for volatility differences; for example, equities are approximately twice as volatile as bonds.

Corporate profit margins have more than doubled since $2000$ , partly due to technology, globalization, and declining union membership.
The late-cycle environment features low unemployment, tightening monetary policy, and declining productivity growth in the United States, Japan, and Europe.
Central banks currently have less power to stimulate the economy, with interest rates near zero or negative and quantitative easing reaching technical limits, such as the $33\%$ debt caps in Europe.