The “missing middle”—bringing EM official investors into focus

Official-sector investing is often described in simple terms, with central banks on one side and sovereign wealth funds on the other. Central banks focus their reserve portfolios on liquidity, safety and confidence while sovereign wealth funds are viewed as long-term, return-seeking investors with broad risk budgets and professional governance structures. This framing is convenient, but incomplete because between these two poles sits a large and increasingly influential group of official institutions.

This “missing middle” includes finance ministries, debt-management offices, stabilization funds, treasury cash managers, public pension plans, national development funds and other state-owned investment vehicles. Together they manage substantial public balance sheets, yet are often overlooked when official-sector investors are analyzed.

In emerging markets (EMs) especially, these institutions can play an outsized role because their assets and liabilities are often large relative to the size of domestic capital markets. They also operate in more volatile macroeconomic environments, so their investment decisions can have a direct impact on currency movements, funding conditions and local bond markets.

These institutions do not fit neatly into either a reserves or endowment category because their mandates are inherently mixed. They are expected to preserve liquidity, smooth fiscal volatility, support debt-management goals and earn returns, often simultaneously. Unlike central banks, they do not operate within a clearly defined lender-of-last-resort framework, and unlike sovereign wealth funds, they are rarely shielded from short-term political scrutiny. The result is an investor operating under tight constraints and constant visibility, with limited room for error.

In practice, their portfolios are far from static. Across parts of Asia, many official institutions outsource mandates in global aggregate bonds, US and global credit, mortgage-backed securities (MBS), EM debt and core fixed-income. In Latin America, interest in US investment-grade credit and agency MBS has grown steadily, sectors that often require specialized risk systems and technical expertise and are therefore frequently managed externally. At the same time, some institutions are building internal analytical capacity alongside these outsourced allocations while certain sovereign vehicles with more flexible mandates have increased their allocations to EM assets themselves. This development is notable in regions already exposed to EM risk and reflects a gradual shift away from purely traditional reserve-style allocations.

Strategic asset allocation (SAA) frameworks increasingly reflect this hybrid mandate. In parts of Asia, institutions review their SAAs annually, but actual changes tend to be incremental, with more significant shifts typically reserved for major market disruptions or broader multi-year reviews. In Latin America, the process is generally less frequent, with SAA exercises conducted every three to five years. These exercises are usually led internally by investment and research teams, with boards or ministries making the final decisions.

Across both regions, some institutions are moving toward versions of a Total Portfolio Approach. Under this structure, assets are grouped into broad “safe” and “risky” buckets within a long-term policy portfolio, rather than being managed strictly against benchmarks within individual asset classes. The aim is to create more flexibility across public and alternative assets and to shift the focus from benchmark tracking toward overall portfolio outcomes.

Governance realities place clear limits on investment decisions, which are judged not only by volatility or expected return but also through the lens of political visibility, audit scrutiny, legislative oversight and potential public criticism. Benchmarks often provide institutional protection as much as investment guidance. Even when diversification is permitted on paper, moving away from familiar assets can create political or reputational risks that outweigh potential financial benefits, and these pressures shape behavior in important ways.

These constraints help explain a recurring paradox in which many EM official investors appear conservative based on long-term policy documents, yet their actions can become pro-cyclical in practice. During extended periods of stability and low yields, pressure to generate returns may lead to gradual extensions into longer-duration or higher-spread sectors. During stress episodes, liquidity needs and political scrutiny can force rapid retrenchment even when long-term fundamentals would support staying invested. The COVID-19 shock illustrated this dynamic, as several fiscal authorities reduced externally managed portfolios to help finance widening budget deficits while markets were under strain. From a sovereign perspective, these decisions were often necessary, yet from a market perspective they tightened dollar funding conditions and amplified volatility in local bond and foreign-exchange (FX) markets. In EMs, where domestic markets are smaller and foreign participation is high, such balance-sheet shifts can have a significant impact because withdrawals of capital during periods of thin liquidity and rising borrowing costs can magnify price movements.

Institutional memory also plays a meaningful role. Ministries of finance and fiscal agencies often experience higher staff turnover than central banks because of political cycles, compensation limits and civil-service rotations. Over time, institutional knowledge about past crises, portfolio decisions and risk trade-offs can fade. In several Asian institutions, long staff tenures and structured rotations help preserve continuity; investment management is treated as a core institutional skill. In parts of Latin America, turnover among junior staff can be higher, although larger institutions tend to maintain stronger governance frameworks and specialized teams. The bottom line is that when institutional knowledge is not well documented or is transmitted informally, crisis responses can vary significantly across cycles—even within the same country. This means institutional memory affects financial outcomes rather than simply organizational culture.

External managers are central to this ecosystem, and their role often extends beyond portfolio management to include idea generation, access to specialized sectors and capacity building. In Asia, more sophisticated institutions may seek differentiated market insights, while others prioritize training and knowledge transfer. In Latin America, larger institutions typically use formal request for proposal (RFP) processes and require structured education on risk management, benchmarks, operations, reporting and FX hedging. Effective knowledge transfer, however, is not automatic because language barriers, time-zone differences, compliance rules and budget constraints can limit engagement. Generic research that mirrors market consensus is rarely valuable, and institutions consistently place greater value on timely, practical analysis that directly supports day-to-day decision-making.

Small externally managed allocations often function as informal pilot programs in which institutions test new asset classes at limited scale to assess operational readiness and internal comfort before expanding exposure. Performance alone is rarely decisive; a central question is whether a strategy would meaningfully affect the total portfolio if scaled and whether it would remain defensible under public scrutiny.

More structured pilot programs can strengthen this process. Central banks and multilateral institutions have increasingly used formal pilots to test new tools and frameworks, including experimentation with tokenized money-market instruments, climate scenario analysis exercises and multi-CBDC (central bank digital currency) trials. Well-designed pilots create internal evidence, test operational systems, surface governance concerns before exposures become systemically relevant and generate documentation that preserves institutional memory across staff transitions. Over time, a sequence of pilots becomes a record of what worked, what did not and why.

The presence of the “missing middle” also highlights the broader challenge of fragmented sovereign balance-sheet management. Central banks manage reserves, debt offices manage liabilities, treasuries oversee cash buffers and pension or stabilization funds manage long-term assets, with each institution optimizing within its own mandate. Few countries maintain a consolidated view of sovereign risk and trade-offs across these silos are often made implicitly rather than explicitly. Official institutions frequently absorb these inconsistencies, suggesting that better coordination or jointly designed pilot initiatives could serve as practical steps toward more integrated sovereign balance-sheet management.

The limited attention given to these official investors reflects both practical and political realities because data is less standardized, mandates are often opaque and portfolio decisions are rarely disclosed in detail. Many fiscal authorities do not describe themselves as investors, preferring to frame activities as prudent fiscal administration, which does not eliminate risk but makes it harder to see.

As global financial conditions become more volatile and fiscal buffers come under pressure, we believe the role of official institutions is likely to expand. For EM institutions in particular, their decisions can materially influence currencies, funding conditions and domestic capital markets, which makes bringing them into clearer focus essential for assessing sovereign resilience and interpreting market behavior in both calm and crisis.