Alexander Campbell
· Campbell Ramble
· April 21, 2026 at 12:09
· ⏱ 19 min read
| Read on Substack ↗
Summary
The article argues that most investors misdiagnose their portfolio problem: they chase expensive or dangerous 'alpha' that is actually levered beta, while failing to understand and properly construct their beta exposure. The solution is to build a diversified, risk-parity style beta portfolio (80-90% of assets) and only allocate a small slice to genuine alpha, which requires demonstrated skill and low correlation to existing holdings.
•The author distinguishes beta (market risk premium) from alpha (return from deviating from market) and argues most 'alpha' is levered beta dressed up with fees.
•Retail investors often concentrate in high-beta stocks or 3x daily-reset ETFs to synthesize leverage, which introduces idiosyncratic risk and decay costs.
•Adding more than 12-14 stocks provides negligible diversification benefit; by 30 stocks the marginal benefit is flat — most portfolios are just one bet (equity beta).
•The author recommends an 80-90% beta / 10-20% alpha allocation, with the beta book built using equal-risk-contribution across 12+ macro asset classes.
•The 'All Beta' portfolio historically benefited from the 40-year bond bull market; the current conflict-inflation regime may require trimming duration and adding gold and commodities.
•Institutions with leverage should prioritize low-correlation managers (even if lower Sharpe) over high-Sharpe but high-correlation funds.
•Retail without leverage can use return-stacked ETFs (NTSX, RSSB) or overlay futures on an ETF portfolio to achieve 2x leverage without daily reset decay.
•The author discloses a personal regime tilt: reducing TLT from 20% to 15%, adding 2.5% each to GLD and DBC, acknowledging this is an alpha call on top of beta.