マーケット・ブログ
STRATEGY
17 June 2026

EM debt—What reserve managers should keep in mind

By Robert O. Abad

Large central banks and sovereign wealth funds are increasingly evaluating whether emerging market (EM) debt should play a larger role within their investment portfolios. This interest reflects broader changes taking place across reserve management. Over the last decade, reserve managers have navigated historically low interest rates, rising geopolitical tensions, sanctions risk, greater scrutiny of concentration risk and more recently a meaningful repricing of developed market (DM) bond yields. Alongside increased allocations to gold and greater exploration of non-traditional assets, some institutions have begun reassessing the role EM debt may play within a strategic asset allocation framework.

While EM debt can offer attractive yields, diversification benefits and, in some cases, currency appreciation potential, its practical application is more complicated than it first appears. EM is not a homogeneous asset class, and successful implementation often depends as much on institutional capabilities as on investment views. For reserve managers, particularly those responsible for safeguarding national assets, decisions regarding EM investing require considerations that extend well beyond traditional yield and correlation analysis.

The expanding and complex EM investing universe

Thirty years ago, the argument for investing in EM debt was relatively straightforward. The investable universe was much smaller, information was scarcer and a relatively small number of countries drove the majority of returns. Dedicated EM investors often operated under a simple philosophy: identify a handful of high-conviction opportunities and size positions accordingly. In many respects, it was a “go big or go home” approach. Markets were less efficient, capital flows were less diversified, and the number of investors actively competing for the same opportunities was far smaller than it is today. For skilled investors willing to conduct deep country analysis and tolerate volatility, the rewards could be substantial.

Today, the landscape looks very different. The EM debt universe has expanded dramatically. New sovereign issuers have entered global bond markets; domestic capital markets have matured; corporate issuance has grown significantly; and local currency markets have become deeper and more accessible. At the same time, the investor base has broadened to include pension funds, insurance companies, sovereign wealth funds, exchange-traded funds, quantitative strategies and increasingly sophisticated reserve managers.

This evolution has created an interesting paradox: the EM opportunity set has never been larger, yet building a truly informed view of that opportunity set has arguably never been more difficult. Many of today’s benchmarks contain dozens of sovereign issuers and hundreds of underlying securities spread across multiple regions, political systems, currencies and stages of economic development. Some countries possess investment-grade balance sheets, strong institutions, favorable demographics and growing domestic capital markets. Others face persistent fiscal challenges, political instability, external financing pressures or structural economic constraints. Yet they may all reside within the same benchmark and be classified as “emerging markets,” even though the underlying risks can be fundamentally different.

For reserve managers, this distinction is critical. EM debt should not be viewed as a single asset class. It is a collection of highly diverse countries operating under vastly different political systems, economic models, institutional frameworks, demographic profiles and geopolitical realities. Increasingly, the differences within EM may be more important than the similarities.

Institutional capabilities and the importance of scale

As the opportunity set has expanded, the importance of institutional capabilities has grown in parallel. One of the most overlooked aspects of investing in EM debt is that success often depends as much on institutional scale as it does on investment skill. The decision to allocate to EM is frequently framed as a risk-return trade-off. In reality, it is often a question of whether an institution possesses the resources, governance framework and analytical capabilities necessary to support such an allocation.

Large reserve managers and sovereign wealth funds typically have advantages that smaller institutions may not. They often maintain dedicated research teams, established risk management functions, access to external managers, sophisticated monitoring systems and governance structures capable of supporting longer investment horizons. Just as importantly, they often possess reserve adequacy levels that allow them to separate liquidity objectives from investment objectives. A reserve manager operating with limited excess reserves may not have the luxury of waiting for a fundamentally sound investment thesis to play out. Liquidity requirements, intervention needs or changing market conditions may force decisions that have little to do with long-term fundamentals.

Larger institutions often enjoy greater flexibility. They can tolerate periods of volatility, maintain positions through temporary market dislocations and devote meaningful resources to understanding complex country-specific risks. Scale also matters because the EM opportunity set has become extraordinarily broad. Today’s reserve manager must evaluate sovereigns, quasi-sovereigns, corporates, local currency markets, hard currency markets, geopolitical developments, fiscal trajectories, elections, regulatory changes and structural economic trends across dozens of countries. The challenge is not simply finding opportunities. The challenge is filtering information, identifying what matters and maintaining conviction when markets move against a position. This requires time, expertise and institutional commitment.

For that reason, reserve managers should view EM allocations as both an investment decision and an institutional decision. Before asking whether a particular country or issuer deserves capital, it may be worth asking whether the organization itself possesses the framework necessary to evaluate that opportunity consistently over time. In many cases, the difference between success and disappointment in EM is not the quality of the asset itself; it is the quality of the institution making the allocation decision.

Given the scale and complexity required, it follows that not every institution should pursue this allocation. An often-overlooked reality is that not every reserve manager should invest in EM debt. That conclusion may sound surprising within an industry that frequently focuses on identifying new opportunities, but prudent reserve management has never been about keeping pace with peers or adopting every new allocation trend. It is about aligning investment decisions with institutional objectives, governance frameworks, liquidity requirements and internal capabilities.

For some institutions, particularly those with limited excess reserves, smaller investment teams or a mandate that remains heavily focused on liquidity and capital preservation, the costs and complexities associated with EM debt may outweigh the potential benefits. There is no stigma attached to that conclusion, and recognizing that an investment opportunity falls outside an institution’s current capabilities may be a sign of strong governance rather than excessive conservatism. The ability to clearly define what an institution should not invest in can be just as important as identifying what it should. The objective is not to expand the opportunity set simply because it exists. The objective is to build a portfolio that can be understood, monitored, governed and defended through a variety of market environments. For some reserve managers, that process may ultimately lead to a strategic allocation to EM debt. For others, it may lead to a decision to wait until internal resources, governance structures or reserve levels evolve further. Both outcomes can represent successful reserve management if they are grounded in a disciplined and well-articulated decision-making process.

Mandates, information and resilience

Another important distinction is that reserve managers are not traditional investors. Most asset managers are ultimately judged on their ability to generate risk-adjusted returns. Reserve managers operate under a different mandate. Their objective is to preserve national wealth, maintain liquidity, support financial stability and generate reasonable returns within those constraints. That may sound like a subtle difference, but it has significant implications for portfolio construction. A pension fund or total return manager may be willing to tolerate periods of significant volatility if expected returns justify the risk. Reserve managers often face a different set of considerations. Their decisions are evaluated not only through the lens of performance but also through the lens of prudence, governance, liquidity and institutional credibility. This naturally places greater emphasis on resilience and downside protection than on maximizing yield.

Because reserve managers operate under a different mandate, the information burden has also increased dramatically. Today’s reserve manager must increasingly assess geopolitical realignments, trade fragmentation, demographic transitions, energy security, institutional quality and domestic political developments. They must also evaluate how these factors interact and whether market pricing adequately reflects those risks. This is not simply a data challenge. In many cases it is an information challenge. The modern investor has access to vastly more information than was available thirty years ago. Yet more information does not necessarily produce better decisions. Much of the information available today is incomplete, contradictory, politically motivated or quickly outdated. As a result, successful EM investing increasingly depends not only on gathering information but also on determining which information matters and which information can safely be ignored.

Consequently, the decision to allocate to EM should not begin with yield. Yield is an outcome rather than a starting point. The starting point should be resilience. Reserve managers should first seek to identify countries capable of navigating a variety of economic and geopolitical environments. Fiscal discipline, institutional credibility, external liquidity buffers, policy flexibility, economic competitiveness and political stability often matter far more than a few basis points of incremental yield.

This becomes particularly important in today’s environment because DM yields have increased meaningfully. A decade ago, investors often felt compelled to move further out on the risk spectrum simply to generate acceptable returns. Today, many DM assets offer yields that would have appeared attractive by historical standards. As a result, the hurdle rate for taking additional risk has risen, and not every spread premium is attractive simply because it exists. Reserve managers should continually ask whether the additional compensation offered by a particular EM region adequately reflects the complexity of the risks being assumed.

The same principle applies when evaluating sovereign, quasi-sovereign and corporate issuers. In some cases, a reserve manager may find that the strongest risk-adjusted opportunity is not the sovereign itself but rather a strategically important corporate or quasi-sovereign with stronger balance-sheet characteristics, diversified revenue streams and access to hard-currency earnings. While these issuers may offer less yield than lower-rated sovereign alternatives, they may also provide greater resilience during periods of market stress.

Practical steps and principles for EM allocations

One lesson repeatedly observed across reserve management is that institutions often benefit from testing before committing. The decision to invest in EM debt does not need to be binary. A modest allocation through an external manager, a limited country universe or a carefully defined risk budget can allow institutions to evaluate operational readiness, governance structures, reporting frameworks, risk management capabilities and internal expertise before committing larger amounts of capital. Perhaps more importantly, pilot programs allow institutions to learn how they will react when markets become difficult. Many investment strategies appear attractive during favorable market environments. The real test comes when spreads widen, headlines deteriorate, volatility rises and investment committees begin asking difficult questions.

For reserve managers considering strategic allocations to EM debt, several practical principles may be useful: focus on selectivity rather than broad exposure; prioritize institutional quality and policy credibility; evaluate resilience across multiple scenarios; be deliberate about currency exposure; distinguish carefully between sovereigns, quasi-sovereigns and corporates; and maintain humility.

The discussion has evolved beyond whether EM debt deserves a place in a portfolio. The more relevant consideration is whether reserve managers possess the framework, resources, governance structure and analytical depth necessary to identify which EM regions deserve capital in the first place.

投資一任契約および金融商品に係る投資顧問料(消費税を含む):
投資一任の場合は運用財産の額に対して、年率1.10%(税抜き1.00%)を上限とする運用手数料を、運用戦略ごとに定めております。また、別途運用成果に応じてお支払いいただく手数料(成功報酬)を設定する場合があります。その料率は、運用成果の評価方法や固定報酬率の設定方法により変動しますので、手数料の金額や計算方法をこの書面に記載することはできません。

投資信託の場合は投資信託ごとに信託報酬が定められておりますので、目論見書または投資信託約款でご確認ください。有価証券の売買又はデリバティブ取引の売買手数料を運用財産の中からお支払い頂きます。投資信託に投資する場合は信託報酬、管理報酬等の手数料が必要となります。これらの手数料には多様な料率が設定されているためこの書面に記載することはできません。デリバティブ取引を利用する場合、運用財産から委託証拠金その他の保証金を預託する場合がありますが、デリバティブ取引の額がそれらの額を上回る可能性があります。その額や計算方法はこの書面に記載することはできません。投資一任契約に基づき運用財産の運用を行った結果、金利、通貨の価格、金融商品市場における相場その他の指標に係る変動により、損失が生ずるおそれがあります。損失の 額が、運用財産から預託された委託証拠金その他の保証金の額を上回る恐れがあります。個別交渉により、一部のお客様とより低い料率で投資一任契約を締結する場合があります。

© Western Asset Management Company Ltd 2026. 本資料の著作権は、ウエスタン・アセット・マネジメント株式会社およびその関連会社(以下「ウエスタン・アセット」という)に帰属するものであり、意図した受取人のみを対象として作成されたものです。本資料に記載の内容は、秘密情報及び専有情報としてお取り扱いください。ウエスタン・アセットの書面による事前の承諾なしに、全部又は一部を無断で複写、複製することや転載することを堅くお断りいたします。

過去の運用実績は将来の運用実績を示すものではありません。また、本資料は、将来の実績を予測または予想するものではありません。

本資料は、適格機関投資家、特定投資家、企業年金基金、公的年金等、豊富な投資経験と高度な専門知識とを備えたプロフェッショナルのお客様のみにご提供するものです。

本資料は情報の提供のみを目的としています。資料作成時点のウエスタン・アセットの見解を掲載したものであり、将来予告なしに変更する場合があります。また、リアルタイムの市場動向や運用に関する見解ではありません。

本資料で第三者のデータが使用されている場合、ウエスタン・アセットはそのデータが公表時点で正確であると信じていますが、それを保証するものではありません。ウエスタン・アセットの戦略・商品の受賞またはランキングが含まれている場合、これらは独立した第三者または業界出版物により公平な定量・定性情報に基づき決定されたものです。ウエスタン・アセットは、これらの第三者の標準的な業界サービスを利用したり、出版物を購読したりする場合がありますが、それらは、すべてのアセット・マネージャーが利用可能なものであり、ランキングや受賞に影響を与えるものではありません。

本資料に記載の戦略・商品には、元本の一部または全部の損失を含む大きなリスクが伴う場合があります。また、当該戦略や商品に投資することは大きな変動を伴う可能性があり、投資家にはそのようなリスクを受け入れる経済力および意思を持つことが求められます。

特段の注記がない限り、本資料に記載の戦略のパフォーマンスはコンポジットのデータです。コンポジットではないその他のデータについては、当戦略の運用方針に最も近いと考えられる口座を、コンポジットの代表口座として掲載しています。つまり、代表口座は運用結果により選択されるものではありません。代表口座のポートフォリオ特性は、コンポジットやその他のコンポジット構成口座と異なる場合があります。これらの口座についての情報はご依頼に応じてご提供いたします。

本資料に記載している内容は、ウエスタン・アセットの投資家に対する投資助言ではありません。個別銘柄・発行体に関する一般的または具体的に言及する内容は、例としてご提示したものであり、購入または売却を推奨するものでもありません。また、ウエスタン・アセットの役職員及びお客様は、本資料に記載の有価証券を保有している可能性があります。

本資料は、会計、法務、税務、投資またはその他の助言の提供を意図したものではなく、またそれらに依存すべきではありません。お客様は、ウエスタン・アセットが提供する戦略・商品への投資を行うにあたり、経済的リスクやメリットなどについて助言が必要である場合は、ご自身の弁護士、会計士、投資家、税理士、その他のアドバイザーに相談して下さい。お客様は、居住国で適用される法令を遵守する責任を負います。

ウエスタン・アセットは世界有数の運用専門会社です。1971年の設立以来、債券運用に特化したアクティブ運用機関として最大規模の運用資産と運用チームを有しています。拠点は米国カリフォルニア州パサデナ、ニューヨーク、英国ロンドン、シンガポール、東京、豪メルボルン、香港、スイス・チューリッヒにあり、フランクリン・リソーシズIncの完全子会社ですが、経営全般に独立性を保っております。構成法人:米国:ウエスタン・アセット・マネジメント・カンパニーLLC(米証券取引委員会(SEC)登録の投資顧問会社)。オーストラリア・メルボルン:ウエスタン・アセット・マネジメント・カンパニーPty Ltd(事業者番号ABN 41 117 767 923。オーストラリア金融サービスライセンス(AFSL)番号303160(オーストラリア証券投資委員会(ASIC)が規制)。シンガポール:ウエスタン・アセット・マネジメント・カンパニーPte. Ltd.(CMSライセンスCo. Reg. No. 200007692R、シンガポール通貨監督庁が監督)。日本:ウエスタン・アセット・マネジメント株式会社(金融商品取引業者、金融庁が規制)。英国:ウエスタン・アセット・マネジメント・カンパニーLimited(英金融行動監視機構(FCA)が認可(FRN145930)、規制)。本資料は英国ではFCAが定義する「プロフェッショナルな顧客」のみを対象とした宣伝目的に使用されます。許可された欧州経済領域 (EEA)加盟国へ配信する場合もあります。最新の承認済みEEA加盟国のリストは電話(+44 (0)20 7422 3000)にてお問い合わせください。

詳細は当社ウエブサイトwww.westernasset.co.jpをご参照ください。

ウエスタン・アセット・マネジメント株式会社について
業務の種類: 金融商品取引業者(投資運用業、投資助言・代理業、第二種金融商品取引業)
登録番号: 関東財務局長(金商)第427号
加入協会: 一般社団法人資産運用業協会(会員番号011-01319)