US Fund Flows Hold Strong in May as Bond Demand Surges

Long-term US funds gathered $116 billion in May, continuing a strong run of inflows and underscoring the durability of investor demand despite market volatility.  

However, the composition of those flows shifted meaningfully from April. Rather than equities driving the market higher, May was defined by a renewed preference for fixed income, as investors recalibrated portfolios in response to persistent inflation pressures and uncertainty around rates. This rotation highlights a more balanced, and somewhat cautious, market stance – one where investors remain engaged but increasingly selective about where they deploy capital. 

For a complete view of fund flows in May, download the free US Monthly Fund Flows Report. 

After leading the recovery in April, equity funds lost momentum in May. US equity flows were effectively flat, as strong inflows into passive funds were offset by continued outflows from active strategies.  

This shift suggests that while investors have not abandoned equities altogether, they are becoming more measured in their exposure. The cooling follows April’s more risk-on sentiment and may reflect a reassessment of valuations and macro risks as volatility persists. 

Rather than broad-based enthusiasm, equity positioning in May appeared more targeted and disciplined, with investors maintaining core exposures while reallocating incremental capital elsewhere – particularly into fixed income. 

Within equities, the divide between passive and active strategies remained pronounced. Passive vehicles – particularly S&P 500 index trackers – continued to attract strong inflows, extending a streak that dates back more than two years without aggregate redemptions.  

Active strategies, by contrast, continued to bleed assets, reinforcing a structural shift in investor preference toward lower-cost, beta-driven exposures. Even in a more uncertain environment, investors appear reluctant to re-engage with active management at scale. 

One of the most notable shifts in May came from international equity. After 12 consecutive months of inflows, the category saw nearly $16 billion in outflows, marking a clear turning point.  

The reversal was broad-based and suggests a meaningful change in sentiment toward non-US markets. Several segments contributed to the decline: 

• Emerging-markets funds experienced more than $3 billion in outflows 
• Focused-region funds shed nearly $4 billion
• Foreign large-growth funds continued a prolonged stretch of redemptions  

Fixed income was the clear beneficiary of May’s rotation. Taxable-bond funds brought in a record $96 billion, marking one of the strongest inflow months ever recorded for the category.  

This surge reflects a decisive shift in investor behavior. With inflation still elevated and rate expectations evolving, investors appear to be seeking both income and stability, reallocating toward bonds after a more equity-heavy positioning in April. 

Within taxable bonds, demand was both broad and concentrated: 

• Intermediate core bond funds: $25 billion in inflows 
• Intermediate core-plus bond funds: $12 billion 
• Strong interest in short-term and inflation-protected segments  

Municipal bonds also saw a meaningful resurgence, gathering $15 billion in May, their second-largest inflow on record.  

Strong issuance, combined with attractive tax-equivalent yields, helped drive demand – particularly within national intermediate and long-duration categories. The pickup in flows suggests that investors are increasingly factoring in after-tax income considerations as part of their allocation decisions. 

Even as broader equity flows slowed, technology remained a standout theme. Sector equity funds gathered more than $19 billion in May, with technology accounting for the bulk of those inflows.  

This marks the second consecutive month of strong demand for the sector and reinforces its position at the center of investor growth narratives. Flows were not limited to a single niche but spanned: 

• Semiconductors 
• Artificial intelligence 
• Software and diversified tech strategies 

A notable contributor was a memory-chip-focused ETF, which drew more than $8 billion in just its second month – highlighting how quickly capital can concentrate around emerging innovation themes.  

Taken together, the data suggests that while investors are moderating overall equity exposure, they remain willing to lean into high-conviction sectors with long-term structural tailwinds. 

ESG-intentional funds extended their recovery in May, bringing in nearly $3 billion, following April’s modest inflows.  

While still early, this marks a meaningful shift:

• Second consecutive month of inflows 
• Largest inflow since March 2022  

Much of the growth has been driven by a single dominant strategy focused on clean energy infrastructure, which has captured a disproportionate share of new assets. This dynamic highlights both the potential for renewed interest in ESG themes and the concentration risk within the category. 

Overall, the trend suggests ESG flows may be stabilizing after a prolonged period of outflows, though broader participation across strategies remains limited. 

Fund flows data offers a real-time window into how investors are positioning portfolios in response to changing market conditions. 

In May, the data points to a clear rebalancing toward fixed income, alongside more selective equity exposure and reduced appetite for international markets. At the same time, persistent interest in passive strategies and technology sectors highlights where conviction remains strongest. 

Advisors can use these insights to:

• Evaluate whether portfolios are overly tilted toward equities after recent rotations 
• Reassess duration and credit exposure within fixed income 
• Identify where client portfolios may diverge from broader market positioning 

Asset flows data in Morningstar Direct enables you to stay current with market trends. It offers a comprehensive, timely picture of the total net assets and estimated net flows across multiple geographical markets as well as organic growth rates for specific markets. 

With trusted, comprehensive flows data, you can:

• Monitor broad investor trends
• Perform competitive analysis
• Develop new products
• Market managed investment products