Quantitative Allocation Strategies: Risk Budgeting, Risk Parity, and TAA

You see a 60/40 portfolio and assume balance. In risk terms, it is roughly 90% equity. Bridgewater's All Weather Fund argued that equalizing risk (not dollars) was the real diversification. When 2008 arrived, equities fell 37% and All Weather lost 3.9%.

Mean-variance optimization treats the portfolio as a single quadratic problem. Quantitative allocation strategies decompose that problem into pieces that map to how institutions actually organize capital and talent.

Strategic Asset Allocation (SAA) and the Total Portfolio Approach (TPA). Strategic Asset Allocation (SAA) is the long-horizon policy mix across asset classes (e.g., 60% equity, 30% FI, 10% alternatives). SAA exists because asset-class labels match how trustees think, how managers are hired, and how returns are attributed. Because siloed asset-class decisions can hide duplicate factor bets and miss liquidity interactions (a private equity allocation and a small-cap equity allocation may duplicate the same underlying factor), some funds evaluate every position portfolio-wide; that philosophy is the Total Portfolio Approach (TPA).

Core-satellite. The core-satellite approach structures the portfolio as a layered pyramid. The well-diversified core sits at the bottom layer and provides downside protection (risk aversion).

Common mistakes

• Confusing dollar weights with risk weights. Candidates see 60/40 and call it "balanced." In PCR terms it is 92/8. The trap answer on an exam stem asking for the "risk contribution of equity in a 60/40 portfolio" is often 60% (echoing the dollar weight).
• Computing PCR without normalizing by portfolio vol. MCR gives the dollar sensitivity; PCR is MCR divided by ${\sigma }_p$. A common trap is to report an MCR value (e.g., 0.092) as the PCR. The correct PCR for that number in a 10% vol portfolio is 0.92, not 0.092.
• Treating unlevered risk parity as the "safer" option. Unlevered risk parity has lower volatility than 60/40, but it also has lower expected return because it is dominated by FI, and it performs poorly when high-risk assets do well. It fails the return target for most pensions and endowments.

Bottom line

• Core-satellite layers a diversified, defensive core (risk aversion, downside protection) beneath a concentrated, aggressive satellite (risk seeking, upside); its goals are more risk control, lower costs, and added value
• Implementation styles differ: bottom-up screens and ranks the best securities (robust but can miss macro shifts), top-down allocates on political, economic, and currency risks, and mixed allocates by fund strategy
• Risk budgeting sets a risk measure (volatility, tracking-error vol, VaR, or beta), fills risk buckets, and only constrains; pair it with an objective function to get a unique portfolio
• An asset's risk contribution equals ${\rho }_i\times {\sigma }_i\times w_i$ (correlation with the portfolio times its volatility times its weight); a factor's contribution swaps weight for loading

Exam shortcut

The one dial that separates the quantitative methods is what the manager equalizes. Risk parity equalizes marginal risk contribution and uses correlations. Inverse volatility weights by standalone volatility and ignores correlation. Minimum volatility minimizes total vol. Equally weighted ignores both volatility and correlation. When the stem says assets are equally volatile with equal correlations, all four coincide; with unequal correlations, only equal-weight and inverse-vol match.

The full lesson (about 5,297 words, 35 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.

Learning objectives

• mvo process
• mvo implementation
• mvo multiple risky
• mvo issues
• mvo adjustments
• mvo estimation error
• tpa overview
• tpa defining
• tpa governance
• tpa factor lens
• tpa competition capital
• tpa culture
• tpa implementing
• core satellite
• top down bottom up
• risk budgeting
• factor risk budgeting
• risk parity
• other quant strategies
• taa
• taa process
• cash commitments illiquidity
• liquid alternatives
• lp direct investment
• co investments
• co investment returns
• secondary market pe
• gp led secondaries
• rebal buy hold constant mix
• rebal directional
• rebal cppi
• rebal obpi
• rebal dynamic illiquid
• rebal costs

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