Sara Devereux: Bonds Are Still Ballast

Episode Summary

Executive Summary: Sarah Devereaux describes how Vanguard’s fixed income team has expanded actively managed, ETF, and technology-enabled capabilities while keeping costs low and performance strong. She argues bonds are again compelling for income and diversification, sees active management as especially valuable in credit and structured markets, and believes AI, electronification, and rising ETF adoption will reshape bond investing.

Main Topics: Vanguard fixed income strategy and team evolution (Priority: 5/5): Devereaux explains how the team has grown since her 2019 arrival through added talent, technology, product launches, and a stronger emphasis on active management and ETFs, all while preserving Vanguard’s client-first mission and low-cost model. Active fixed income philosophy and 'alpha waterfall' (Priority: 5/5): She outlines Vanguard’s active approach: team-based investing, disciplined process, strong risk controls, patience on valuations, and a hierarchy of alpha sources that prioritizes the most repeatable, high-information-ratio strategies. ETF growth and product design (Priority: 4/5): The discussion highlights the rapid rise of fixed income ETFs and active ETFs, how Vanguard evaluates liquidity/transparency before launch, and why ETFs are increasingly a core wrapper for fixed income access. Market outlook: yields, diversification, and 2025 performance (Priority: 5/5): Devereaux reviews why bonds performed well in 2025—higher starting yields, downside protection, and price gains as rates fell—and argues the higher-rate regime has restored bonds’ role as portfolio ballast. Credit markets, private credit, and security selection (Priority: 4/5): She emphasizes tight spreads, stronger public credit fundamentals, and growing but riskier private credit, arguing that credit selection, up-in-quality positioning, and dry powder matter more when valuations are full. Technology, AI, and trading modernization (Priority: 4/5): Devereaux describes Vanguard’s investment in AI, ML, optimization engines, and electronic trading tools to improve insights, speed decisions, and execution efficiency without replacing portfolio managers. 2026 outlook: policy crosswinds, labor market, and technicals (Priority: 5/5): She expects a generally positive year for fixed income, with income doing more of the work than price appreciation, while monitoring labor-market softness, tariff effects, AI capex, and heavy supply versus strong demand.

Key Arguments: Vanguard’s mission is not just indexing, but lowering cost and complexity so investors can access high-quality fixed income efficiently. Active fixed income can be done at low cost today because of scale, skill, and technology, making Bogle’s low-cost vision still relevant. Vanguard’s active edge comes from a collaborative team, no SMA distractions, and PM incentives tied to alpha rather than asset gathering. The 'alpha waterfall' focuses on the most reliable sources of return first, such as credit security selection and data-driven rate signals, while using lower-conviction levers only opportunistically. ETF growth in fixed income is structural, driven by cost, tax efficiency, and liquidity, but product launches remain disciplined and liquidity/transparency constrained. Bonds have regained their diversification power because starting yields are materially higher than during the zero-rate era. Private credit offers higher return and diversification, but the illiquidity premium has compressed and due diligence remains critical. Technology improves fixed income investing by enhancing research, decision-making, and execution, especially in fragmented markets like credit and municipals. 2026 should be a decent fixed income year, with income as the main return driver and the biggest macro risk coming from labor-market weakening. AI capex is both a growth support and a bond-market supply shock, likely creating opportunities in high-quality issuers when spreads widen on new issuance. Tight spreads mean investors are not being paid much to move down in credit quality, supporting Vanguard’s up-in-quality bias and emphasis on security selection.

Data Points: Time at Vanguard fixed income helm: Nearly 5 years - Devereaux has led Vanguard’s fixed income group since 2019. Assets under management: $2.8 trillion - Current fixed income AUM, up from $1.9 trillion when she took over. Previous fixed income AUM: $1.9 trillion - AUM when Devereaux became head of fixed income. New products launched in past year: 23 - Vanguard launched 23 products in the last year, most of them ETFs. ETF launches among new products: 18 - Of 23 launches, 18 were ETFs. Expense ratio cuts returned to clients: $350 million - Vanguard returned this amount to clients last year through expense ratio cuts. Low-cost positioning of active funds: 98% priced in the lowest decile of category - Devereaux cites this as evidence of Vanguard’s low-cost model. 10-year active bond fund outperformance: 85% - Share of Vanguard bond funds outperforming peers on a 10-year trailing basis. U.S. ETF market size a decade ago: About $2 trillion - Used to illustrate ETF market growth. U.S. ETF market size today: Over $13 trillion - Current U.S. ETF market size. Fixed income share of ETF market: About 20% - Only a fifth of the total ETF market is fixed income. 2025 fixed income ETF cash flows: About $425 billion - Record flows into fixed income ETFs last year. Fixed income ETF share of overall bond market: Less than 5% - Shows room for growth in fixed income ETFs. Fixed income ETF launches in 2025: About 144 - Among those launches, over 75% were active. Active share of 2025 fixed income ETF launches: Over 75% - Most new fixed income ETF launches were active. Active share of 2025 fixed income ETF flows: 40% - Flows into fixed income ETFs that went to active strategies. ETF share of active fixed income flows: 60% - Within active fixed income, ETFs captured most flows. Morningstar U.S. Core Bond Index return in 2025: Just over 7% - Referenced as the benchmark example of strong bond-market performance. Treasury share in Agg index historically: 20% - Devereaux notes the aggregate index used to be about 20% Treasuries. Treasury share in Agg index today: 40%–45% - The index now has a much larger Treasury weight. Treasuries traded electronically: Two-thirds - She says about two-thirds of Treasury trading is electronic. Credit traded electronically: A little over half - Electronic trading adoption in credit markets. ETF basket turnaround time: 10–15 minutes - Down from roughly two hours using new optimization tools. Prior ETF basket turnaround time: About 2 hours - Historical workflow before optimization improvements. Muni quote processing: 4 million quotes/day to about 100 actionable trades/day - Example of liquidity aggregator use on the municipal team. 2025 bond market return drivers: Income, downside protection, and price appreciation - Explained as the main reasons bonds had a good year. High-yield index composition: Double-Bs about 50%; triple-Cs about 11% - Used to show public credit quality is stronger than in prior cycles. High-yield index composition in 2007: Double-Bs about one-third; triple-Cs about 22% - Comparison to today’s higher-quality index composition. Private credit/direct lending market size: About $2 trillion - Approximate size after a decade of growth. Illiquidity premium compression: 500–600 bps historically vs about 200 bps today - Private vs public credit spread advantage has narrowed. Hyperscaler-specific issuance in late 2025: About $100 billion - AI-related debt issuance that increased bond-supply pressure. Hyperscaler issuance in 2024: About $20 billion - Shows how rapidly AI-related issuance has risen. Expected AI-related issuance in 2026: Close to $400 billion - Forecast for broader AI-related debt issuance. AI-related issuance share of total IG issuance in 2026: About 15% - Illustrates the importance of the AI funding wave to investment-grade supply. GDP impact from AI capex: +50 bps - AI capex is expected to add roughly 0.5 percentage points to GDP forecast. Fiscal policy boost from OBBB: +40 bps - Devereaux expects the policy to add about 40 basis points to growth. 2015-2025 fixed income inflow pattern: Over $1 trillion annually in 2023, 2024, 2025 - Used to describe sustained investor demand for fixed income. Money market share of fixed income inflows in 2023: 80% - Investors heavily favored cash-like instruments during the yield inversion. Money market share of fixed income inflows in 2025: About 50% - Flow mix has moved farther out the curve. Vanguard investor/advisor mix in 2025: About 2:5:7? - Transcript appears to indicate a mix shift but the exact wording is garbled; emphasis was on more out-the-curve allocation.

Pivotal Quotes: "“Give investors the best chance of investment success.”" — Sarah Devereaux: She frames Vanguard’s mission and why the firm’s culture and low-cost approach matter. "“People and process result in performance, right? Great people, great processes, great performance.”" — Sarah Devereaux: Her concise summary of Vanguard’s active fixed income philosophy. "“We’re not going to go for that flash in the pan.”" — Sarah Devereaux: She explains Vanguard’s disciplined product-development stance for ETFs and broader fixed income offerings.

Implications: For investors, bonds look more attractive than in the zero-rate era: income is back, diversification is stronger, and active management matters more in tight-spread markets. Fixed income ETFs and AI-enabled workflows should keep expanding, but credit risk and labor-market weakness remain key watch points.