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All About Asset Allocation, in detail
All About Asset Allocation is Richard Ferri's systematic guide to building and maintaining a diversified investment portfolio. Ferri is a fee-only financial advisor and a longtime advocate of low-cost index investing in the Bogle tradition. The book is neither philosophy nor polemic — it is a practical, data-heavy manual that walks through each major asset class, explains the historical return and risk characteristics of each, and shows how combining imperfectly correlated assets reduces portfolio volatility without sacrificing expected return.
The central argument is that asset allocation — how you divide a portfolio among stocks, bonds, real estate, and other assets — is the primary driver of long-run investment outcomes. Security selection and market timing, which dominate most investment conversation, are far less important. Ferri backs this with the standard academic literature on portfolio theory: work by Markowitz, Fama, and French that has been replicated consistently for decades. The practical implication is that most investors should spend their time choosing an allocation that matches their risk tolerance and time horizon, then automate the rest.
The book covers domestic equity in detail — large versus small cap, growth versus value — and then extends to international developed markets, emerging markets, REITs, commodities, Treasury Inflation-Protected Securities, and bonds across different maturities. Each chapter explains what each asset class offers, what risks it carries, and how it correlates with the others. The second edition expanded coverage of international diversification as evidence for higher correlations during crises mounted.
The limitation is that the book is dense. This is reference material, not a quick read. Ferri writes clearly, but the density of data tables and asset class breakdowns means the book rewards a reader who wants to build a portfolio from scratch, not one looking for a quick motivational overview. For investors who prefer a high-level framework, The Four Pillars of Investing or The Little Book of Common Sense Investing cover similar terrain in fewer pages.
The big ideas
- 1.
Asset allocation — the split between asset classes — explains more of long-run portfolio performance than security selection or market timing.
- 2.
Combining assets with low or negative correlations reduces portfolio volatility without reducing expected return, the core benefit of diversification.
- 3.
Low-cost index funds are the most reliable implementation vehicle for any asset allocation strategy, because costs compound against returns over decades.
