Skip to main content
main content, press tab to continue
Article

Going Electric: Transitioning from strategic asset allocation (SAA) to total portfolio approach (TPA)

By Simon Barsoum, CFA , Shane R. Dusch, CFA , Christian Eicher, CFA and Michael Spokane | July 16, 2025

Shift from strategic asset allocation (SAA) to total portfolio approach (TPA): dynamic, holistic investment approach. For Wholesale Investors only.
Investments
N/A

Bob Dylan's decision to play an electric guitar at the Newport Folk Festival in 1965 was a pivotal moment that symbolized the resistance to change in the music world. Similarly, the investment community has long been anchored in the traditional SAA model, which is rooted in modern portfolio theory. Strategic asset allocation has been the standard, emphasizing a static and formulaic approach to asset allocation. However, just as Dylan's electric guitar was met with skepticism and criticism, the shift towards TPA has faced its own resistance.

The total portfolio approach represents a more holistic and dynamic approach to investing, one that considers a broader range of factors and allows for more flexible decision making. Despite the initial reluctance, more and more asset allocators are recognizing the benefits of TPA and are beginning to adopt this framework.

In the following Q&A, we delve into the journey from an SAA-dominated landscape to a more dynamic, TPA-driven future, and discuss the steps necessary to make this transition.

Q1: Why was SAA (the board-led approach) considered the “gold standard” for so long, before TPA’s emergence?

From the 1980s through the 2010s, asset owners were primarily governed by boards. The investment world was simpler, and boards were comfortable setting an ‘asset allocation’ (beta), while delegating investment selection and performance (alpha) to managers. SAA worked efficiently for this type of governance. Here are the reasons why SAA was seen as the ‘gold standard’ for so long:

  • Board-driven governance: Most investment decisions are overseen by boards operating on a calendar-based schedule. These boards preferred long-term policy targets and rebalancing rules that could be reviewed at regular intervals. SAA aligned well with this governance model by offering a structured approach to portfolio oversight.
  • Prevailing investment philosophy: The investment world was anchored to Modern Portfolio Theory, which included the efficient frontier and mean-variance, which fed into SAA structure. This was the backbone of investment philosophy at the time.
  • Data and operational practicality: In the late 20th century, technology was limited, and reliable financial data were constrained. Making dynamic, real-time portfolio decisions, as required under TPA, simply wasn’t possible. The SAA’s periodic rebalancing and long-term orientation were more operationally realistic.
  • Stakeholder communication: Stakeholders (sponsors, regulators, committees) can easily understand an SAA portfolio and relate it to expected long-term outcomes.

Q2: How has the market environment changed since SAA was developed?

The investment landscape has evolved significantly since the 1980’s, creating conditions more conducive to the adoption of TPA. Key changes include:

  • Rise of alternatives: There were less available asset classes and alternative investments in the SAA era. Investing in alternatives like hedge funds, private equity and real assets were seen as niche and not easily accessible.
  • Technology advances: There have been huge technological advancements since the SAA era, with financial data and systems improving tremendously. TPA requires a better ability to access financial data to make more complicated and live decisions.
  • Market environment changes: Globalization has led to asset classes having higher correlations; therefore, the need for alternatives has increased.

MSCI ACWI and BBgBarc Global Aggregate Index Return Correlations Used

  • Rise of investment expertise: Expertise within the investment world whose job is to build portfolios based on clients’ overall goals has improved considerably. This has afforded the ability to make real-time decisions and less calendar-based decisions.
  • Mission-oriented objectives: Pension funds became more liability-driven and mission-oriented. Objectives became outcome-focused and less focused on performance relative to an SAA benchmark.

Q3: What is the decision-making process in TPA and how does it differ from SAA?

An early step that asset owners should consider in their transition from SAA to TPA relates to team and governance structures. Creating executive teams or sub-committees with clear goals can be a simple, effective way to free up time for the board or committee. It can also help the committee think more strategically. However, organizational change and a shift in cultural thinking can involve significant disruption and effort to break the inertia and get the buy-in of all stakeholders.

A Board-Executive governance model with a main committee and one or several sub-committees can greatly improve the investment decision-making process. The Board’s job is to define and set the goals for the portfolio and assign a reference portfolio that matches the goals. Then, the Board delegates specific investment decisions (allocations to risk factors, asset classes, dynamic positions) to the Executive team(s). The Executive team(s) are better able to make those decisions by having more capacity and expertise. All investment decisions with TPA should be made on the basis of whether they improve the portfolio’s ability to meet its objectives or outperform its reference portfolio. The Executive team reports regularly to the Board.

Under an SAA framework, Committees often retain ownership for strategic and specific investment decisions. The drawback is that Committees may be slower moving, constrained by time, resources and expertise, ultimately leading to sub-optimal portfolios.

Q4: What are a few simple ways for asset owners to begin the transition from SAA to TPA?

SAA and TPA are not necessarily binary decisions and exist on a spectrum. This lets asset owners who want to transition to TPA change their current SAA framework without having to suddenly dismantle it.

One step to consider could be the introduction of reference portfolio benchmarks into a client’s reporting materials. Presenting longer-term total portfolio performance against a simple equivalent-risk or equivalent-return portfolio can highlight value added from drivers such as diversification, dynamism, and manager alpha. This can complement performance analysis against a traditional SAA benchmark.

Asset owners could also revisit SAA targets more frequently to increase flexibility. This creates the opportunity to practice a TPA mindset. Over time, asset owners can build upon simple steps like these examples to drive that continued evolution toward TPA.

Q5: What are the limitations with the SAA approach within this new environment?

The table depicts the limitations with the SAA approach and how TPA approaches the same limitation.
Category Problem TPA Advantage
Interest Rate Volatility SAA traditionally relies on bonds to provide stability and income. With central banks hiking rates aggressively, bond prices have declined sharply, undercutting their role as safe assets. TPA flexibly reallocates away from underperforming bonds by focusing on total portfolio objectives rather than fixed asset buckets. It emphasizes risk-adjusted returns and diversifiers that better fulfill the portfolio’s defensive role.
Inflation Uncertainty Persistent inflation driven by supply shocks, labor market tightness, and deglobalization, complicates return expectations, especially for fixed income and traditional 60/40 portfolios. TPA can prioritize real return objectives, allowing increased allocation to inflation-sensitive assets like commodities and real assets. It adapts to inflationary regimes by avoiding rigid reliance on 60/40 structures.
Geopolitical Risk Rising geopolitical tensions introduce volatility and shift global capital flows. TPA integrates scenario analysis and dynamic risk management across the entire portfolio, enabling better response to geopolitical shocks. It uses overlays and tactical shifts to adjust exposures without disrupting long-term strategy.
Liability Hedging SAA traditionally uses a mix of long government and credit bonds to hedge the interest rate risk of the liability with physical bonds. The hedge ratio is constrained by the capital allocated to liability hedging (per the SAA), and credit bonds can be expensive to trade. In TPA, derivatives and overlays can boost the hedge ratio while conserving capital. A treasury-based liability hedging portfolio can also function as a tail risk hedge. Additionally, asset owners can use their return-seeking assets as an indirect hedge to the liability’s credit spread risk, given the positive correlation between credit bonds and these assets.

Q6: Is there a real-life example of an asset owner progressing on the path from SAA to TPA?

The Endowment Model, popularized in the mid- to late-1980’s by David Swensen at Yale University, represented the first large-scale evolutionary breakthrough from the traditional SAA model. Rather than relying only on traditional, liquid public market assets, the Endowment Model embraced significant allocations to alternatives such as private equity, hedge funds, and real assets. This capitalized on the illiquidity premium and diversified away from conventional market beta.

By accessing different types of risk premia, particularly manager skill (alpha) and illiquidity, the Endowment Model broke through the rigidity of the SAA framework. This innovation laid important groundwork for the development of TPA. TPA builds on the idea of managing portfolios holistically and dynamically across asset classes and strategies.

Q7: Can TPA completely replace SAA for all types of investors?

TPA cannot completely replace SAA for all types of investors. TPA involves active, short- to medium-term shifts based on market conditions, which require constant monitoring, skill, and often, higher costs. For many investors, especially those seeking to navigate uncertainty and capture short- to medium-term opportunities, TPA can be complementary and in some cases, a more effective core strategy than traditional SAA.

Conclusion

The shift from SAA to TPA reflects the evolution in investment thinking, from a static board-driven model to a more dynamic, integrated approach. As markets become more complex and interconnected, the need for flexibility, real-time decision making, and alignment with long-term goals has never been greater. While TPA provides the tools and structure to meet these demands, the transition from SAA doesn’t need to be abrupt. It can be gradual and customized to each investor’s needs and governance structure.

If you're currently on board with a SAA mindset, we hope this paper provides the insight and inspiration to embark on the journey towards TPA, and to experience your own ‘Dylan going electric’ moment.

Disclaimer

Towers Watson Australia Pty Ltd ABN 45 002 415 349 AFSL 229921 (“WTW”) has prepared this material for general information purposes only and it should not be considered a substitute for specific professional advice. In particular, its contents are not intended by WTW to be construed as the provision of investment, legal, accounting, tax or other professional advice or recommendations of any kind, or to form the basis of any decision to do or to refrain from doing anything. As such, this material should not be relied upon for investment or other financial decisions and no such decisions should be taken based on its contents without seeking specific advice.

This material is based on information available to WTW at the date of this material and takes no account of developments after that date. In preparing this material we have relied upon data supplied to us or our affiliates by third parties. Whilst reasonable care has been taken to gauge the reliability of this data, we provide no guarantee as to the accuracy or completeness of this data and WTW and its affiliates and their respective directors, officers and employees accept no responsibility and will not be liable for any errors, omissions or misrepresentations by any third party in respect of such data.

This material may not be reproduced or distributed to any other party, whether in whole or in part, without WTW’s prior written permission, except as may be required by law. In the absence of our express written agreement to the contrary, WTW and its affiliates and their respective directors, officers and employees accept no responsibility and will not be liable for any consequences howsoever arising from any use of or reliance on this material or any of its contents.

WTW may enter into transactions with, and use the services of, any of our related bodies corporate. Such arrangements will be based on arm's length commercial terms.

Authors


Associate Director, Investments
email Email

Director, Investments
email Email

Director, Investments
email Email

Investment Analyst
email Email

Contact


Co-Head of Credit and Chief Investment Officer, U.S.
email Email

Related content tags, list of links Article Investments
Contact us