Longtime lead manager Michael Sais plans to retire in April 2026 but will remain on the fund until then. That plus J.P. Morgan's depth of talent and a thoughtful transition plan here keeps the fund's appeal intact.
Sais, the lead manager on the fund since 1997, announced his April 2026 retirement a year in advance, providing time to facilitate a smooth transition to Ed Fitzpatrick, whom the firm named as a comanager on the fund on April 1, 2025. The choice is interesting given Fitzpatrick's macro focus compared with Sais' deep expertise within securitized sectors; Fitzpatrick comes with solid credentials, though, as J.P. Morgan's US rates head; he joined the firm in 2013 and has more than 25 years in the industry. However, his management experience at the firm is limited. For Fitzpatrick, getting up to speed will be paramount. He will have the help of Sais and comanager Bob Manning, who's been on the fund since 2013 and has more than 25 years of industry experience.
These team changes should not affect the fund's disciplined security selection process and stable approach to keeping the portfolio's interest rate sensitivity, as measured by duration, within a narrow range. The fund prominently features agency-backed residential mortgage-backed securities and commercial mortgage-backed securities, typically about two-thirds of assets, compared with the Bloomberg US Government Bond Index, which only features Treasuries and agency debt. The fund's MBS stakes are not run-of-the-mill; instead, these securities are prone to losing less in rising interest rate environments and gaining more in falling ones than plain-vanilla pass-throughs, which are included in some competitors' portfolios. This style results in a more predictable portfolio and stable duration profile, limiting extension, or increased sensitivity to changing yields, in periods of rising yields, for example. While the process considers macro themes, bottom-up security selection drives portfolio construction. Agency-backed RMBS and CMBS and collateralized-mortgage obligations typically constitute 45% to 65% of assets, while Treasuries (15%-30%) and agencies (3%-20%) take a supporting role. The fund's approach to interest rate risk stands out, too, normally keeping duration between 5.0 and 5.5 years.
While all bonds in the portfolio carry a US government guarantee, the team’s constant relative value assessments produce subtle portfolio shifts over time. The June 2025 portfolio held Treasuries and agencies (33% of assets), agency CMBS (16.4%), agency CMOs (25.6%), residential pass-throughs (22.1%), and cash. This approach enables the fund to outyield its 100% Treasury and agency debt index. Recently, these relative value calls led to a reduction in Treasuries and agencies while upping residential MBS pass-throughs and CMOs to nearly 48% of assets, about 9 percentage points higher than two years prior. The fund's 5.8-year duration was little changed over the past year, which is slightly longer than its upper band.
Long-term performance is competitive. Since January 1997, Sais' first full month on the fund, the R6 shares’ 4.07% annualized return through August 2025 beat its distinct intermediate government peer median and the Bloomberg US Government Index by 45 and 26 basis points, respectively. This top-quintile result and its lower-than-peer volatility led to strong risk-adjusted results. The fund's typical longer-duration profile can cause it to lag when long-term yields rise; otherwise, though, its more stable MBS investments make for a compelling ride.