How bond ETFs are powering a portfolio evolution and fixed income revolution
Bond ETFs: A durable foundation for modern portfolios
Key takeaways
Fixed Income ETFs are playing an important role in modern portfolio construction; to date in 2026, inflows into bond ETFs are up 50% vs. year-ago levels.
We believe bond ETFs can help investors navigate the market’s defining trends including elevated cash balances, the demand for income, and the rise of both private market exposures and digital assets in portfolios.
iShares offers a wide range of fixed income ETFs – including active, systematic and outcome-oriented funds – designed to help serve as an anchor in portfolios by providing income, diversification, and stability.
How ETFs are helping reshape fixed income investing
Fixed income ETFs are off to a record start to 2026, with global inflows of over US$175 billion as of March 31, outpacing inflows in the same timeframe last year by nearly US$40 billion.1
We believe these flows reflect the evolved role bond ETFs are playing in portfolios, and how they’re helping investors navigate the defining trends shaping the market today, as detailed in A durable foundation: How bond ETFs are powering a portfolio revolution.
These trends include:
- Elevated cash balances
- The demand for income, helping drive the rise of active and systematic fixed income ETF strategies
- Expanding private market allocations
- Accelerating digital asset exposure
How are elevated cash balances impacting fixed income investing? One of the most visible trends in recent years has been the rise in cash balances. By year-end 2025, global money market balances climbed to nearly US$12 trillion.2 Higher short‑term rates have made cash feel more attractive, especially during periods of uncertainty.
But as interest rates eventually move lower, cash yields tend to reset quickly.3
Bond ETFs: Helping investors pursue income while managing risk
Income remains a top priority for many investors, but reaching for yield can come with tradeoffs. Extending duration or moving lower in credit quality can increase sensitivity to rate changes or economic stress.
Bond ETFs now offer a wider toolkit to help address this challenge. Beyond traditional index exposure, investors can access:
- Active bond ETFs, which offer investors access to harder-to-reach fixed income sectors through the convenience of an ETF wrapper.
- Systematic Fixed Income ETFs, which combine human expertise with quantitative, data-driven techniques to refine risk and income.
- Outcome‑oriented ETFs, such as covered call BuyWrite strategies, which are designed to target specific objectives such as enhanced income or reduced rate sensitivity.
Used together, these approaches allow investors to pursue income in a more diversified and risk‑aware way, while maintaining transparency, scalability, and operational efficiency.
With the income toolkit available today, a diversified, 6% yielding portfolio can be built by blending a combination of ETFs, without having to go too far down the credit quality spectrum or taking on excessive duration.
What role can bond ETFs play alongside private markets?
We estimate investible opportunities across private equity, private credit and privately held infrastructure and real estate will expand to US$32 trillion by 2030, up from US$19 trillion today.4
While private markets offer potential diversification and return opportunities, they also require careful liquidity planning. Capital commitments, irregular cash flows, and longer investment horizons can make flexibility especially important.
Bond ETFs can help balance these characteristics. Their ability to trade throughout the day — even during periods of market stress — makes them a useful complement to less liquid investments. For many investors, bond ETFs provide a way to maintain flexibility while seeking potential longer‑term opportunities.
Did you know? Bond ETFs trade an average of US$60B a day, up from US$20B in 2020.
How do bond ETFs support digital asset exposures?
The total crypto market cap is now US$2.4T5 and digital assets have become a larger part of investor portfolios:
- ETPs providing access to cryptocurrency have grown from US$4 billion to US$120 billion in just 3 years, with now 300+ listed ETPs.6
- >75% of institutional investors are expected to increase allocations while 59% planned to allocate >5% of AUM to cryptocurrencies.7
Allocations to cryptocurrencies may introduce more volatility in portfolios, which bond ETFs may help offset.
High‑quality fixed income can help serve as an anchor in portfolios by providing income, diversification, and stability. Bond ETFs can help mitigate drawdown and tail risk by ensuring diversified duration/credit exposure and consolidating exposure into a single vehicle to simplify implementation, and the ability to efficiently rebalance.
A durable foundation: How bond ETFs are powering a portfolio revolution
Today’s portfolios look very different than they did a decade ago. Investors now have access to a broader range of opportunities— from digital assets and thematic strategies to private markets. While this expanded toolkit offers new ways to seek growth and income, it also may introduce greater complexity, different liquidity profiles, and new sources of volatility.
We believe innovation in investing will continue. New asset classes, strategies, and technologies may reshape portfolios in the years ahead. But as portfolios evolve, the importance of a durable foundation only grows.
Fixed income has moved beyond its traditional role as a ballast to equity allocations. And bond ETFs have become a central way investors access, manage, and rely on bonds in a modern portfolio.
In the modern allocation framework, fixed income ETFs are not simply a component of the portfolio — we believe they will continue to evolve to support the revolution to come for portfolios and the assets within them.
Learn more
A durable foundation
How bond ETFs are powering a portfolio revolution
Fixed income ETFs
Learn how iShares fixed income ETFs can help you manage risk, enhance yield, and navigate Asia’s evolving markets.
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1 Source: BlackRock Global Business Intelligence as of March 31, 2026.
2 Source: BlackRock Global Market Intelligence, as of December 31, 2026. Money market balances reached US$11.8T in 2026.
3 In prior rate-cutting cycles, the one-year average return on cash after cuts began again after a pause of 3 months of longer was approximately 2.8%, reflecting the rapid repricing of short-term yields. By contrast, bonds have historically delivered 6–8% over the same period. Source: BlackRock, Bloomberg. Cash represented by Bloomberg US T-Bills 1-3 Month Index; USD Govt represented by Bloomberg US Treasury Index; USD Agg represented by Bloomberg USD Aggregate Index; Global Agg represented by Bloomberg Global Aggregate Bond Index (USD Hedged). Average 1yr total returns for the post-rate hike periods: 30/10/1990-30/10/1991, 10/04/1992-10/04/1993, 20/12/1995 – 19/12/1996, 26/06/2003 – 25/06/2004, 19/10/2008 – 19/10/2009, 04/03/2020 – 04/03/2021. Index performance is for illustrative purposes only. Index performance does not reflect any management fees or expenses. Indexes are unmanaged and one cannot invest directly in an index. Past performance does not guarantee future results.
4 Source: Preqin data, as published in “Private Markets in 2030" in October 2026. Private equity is inclusive of venture capital. The model has leveraged Preqin’s closed-end fund dataset. Given that Preqin coverage of the open-ended fund universe is not yet suitable for modelling, BlackRock provided a top-down estimate of the private credit Business Development Company (BDC) universe. Preqin added that estimate to the overall forecast to provide better context for the growth of the overall asset class. Although Preqin acknowledges that other fund structures, such as European long-term investment funds (ELTIFs) and long-term asset funds (LTAFs), are an important part of the growth story, Preqin is not yet incorporating these vehicles into forecasts – which may represent additional upside risk to our view. Note that, as a result, Preqin does not have corresponding forecasts for BDC fundraising and performance. There is no guarantee that any forecasts made will come to pass.
5 Source: TradingView, as of March 31, 2026.
6 Source: BlackRock Global Business Intelligence, as of March 31, 2026.
7 Source: Coinbase & EY Parthenon Institutional Investor Digital Assets Survey, Jan 2026. Survey findings are based on responses from 352 institutional investors. https://www.ey.com/content/dam/ey-unified-site/ey-com/en-us/insights/financial-services/documents/ey-growing-enthusiasm-propels-digital-assets-into-the-mainstream.pdf
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