Instead of simply owning different stocks and bonds, a more robust strategy is to hold assets that perform differently under various economic conditions like high risk, instability, or inflation. This involves balancing high-volatility assets with stores of value like gold to protect against an unpredictable future.

Owning ten different tech stocks is not diversification; it's a concentrated bet on one economic outcome. A resilient portfolio includes assets that react differently to the same major stressors, like inflation, deflation, or a credit crunch. This requires holding a mix of equities, hard assets, commodities, and liquidity.

A robust alternative investment portfolio isn't just about adding a new asset class. Goldman Sachs emphasizes a three-pronged diversification approach: across different strategies (buyout, venture), multiple managers (GPs), and different vintage years to smooth out market cycles.

Systematic models don't attempt to forecast unpredictable shocks like policy changes. Instead, they build portfolios with 'guardrails'—diversifying away concentrated macro risks like sector or country bets—to ensure resilience and avoid being badly damaged by any single event.

The 60/40 portfolio is obsolete because bonds, laden with credit risk, no longer offer safety. A resilient modern portfolio requires a broader mix of uncorrelated assets: cash, gold, currencies, commodities like oil and food, and short-term government debt, while actively avoiding corporate credit.

Owning multiple stocks or ETFs does not create a genuinely diversified portfolio. True diversification involves owning assets that react differently to various economic conditions like inflation, recession, and liquidity shifts. This means spreading capital across productive equities, real assets, commodities, hard money like gold, and one's own earning power.

A more robust diversification strategy involves spreading exposure across assets that behave differently under various macroeconomic environments like inflation, deflation, growth, and contraction. This provides better protection against uncertainty than simply mixing asset classes.

Beyond its primary role of reducing drawdowns, trend following acts as a premier diversifier that can solve several portfolio construction flaws at once. It can dynamically allocate to foreign markets (solving home bias), value stocks (when they're trending), and real assets like gold and silver, providing exposure that traditional portfolios often neglect.

Investor Mark Ein argues against sector-specific focus, viewing his broad portfolio (prop tech, sports, etc.) as a key advantage. It enables him to transfer insights and best practices from one industry to another, uncovering opportunities that specialists might miss.