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Experts

Marc Seidner

CIO Non-traditional Strategies

Mr. Seidner is CIO Non-traditional Strategies and a managing director in the Newport Beach office. He is also a generalist portfolio manager and a member of the Investment Committee. He rejoined PIMCO in November 2014 after serving as head of fixed income at GMO LLC, and previously he was a PIMCO managing director, generalist portfolio manager and member of the Investment Committee until January 2014. Prior to joining PIMCO in 2009, he was a managing director and domestic fixed income portfolio manager at Harvard Management Company. Previously, he was director of active core strategies at Standish Mellon Asset Management and a senior portfolio manager at Fidelity Management and Research. He has 39 years of investment experience and holds an undergraduate degree in economics from Boston College.

Latest Insights

PIMCO Perspectives

Old-Fashioned Bond Math for a New-Fashioned Fed

In the Warsh Fed's new era of two-way risk, bonds offer something rare: potential downside risk mitigation that investors get paid to hold.

Economic and Market Commentary

Three Cyclical Forces Shaping Markets

Energy shocks, private credit stress, and AI disruption are changing expectations for rates and risk. Marc Seidner, CIO non-traditional strategies, explains how we’re approaching portfolio construction now.

PIMCO Perspectives

When Geopolitics Becomes an Economic Input

Strategies to strengthen and diversify portfolios need to adapt to a world where geopolitical risk is a feature rather than a bug.

Economic and Market Commentary

Iran, Oil, and Rates: What We’re Watching

In this brief update, Marc Seidner, CIO of non-traditional strategies, shares how we're managing risk amid rising geopolitical uncertainty, and why today's higher yields and active management can help bonds serve as a cushion against volatility.

PIMCO Perspectives

Expect the Unexpected

Surprise, rather than stability, may be the defining feature of 2026 as policy volatility reshapes markets and investment opportunities.

Economic and Market Commentary

Compounding Opportunity in Bonds

Marc Seidner, CIO non-traditional strategies, explains why it isn’t “too late” for bonds.

Economic and Market Commentary

Calculating the Active Advantage in Fixed Income

Reevaluating passive bond allocations – which have historically underperformed active strategies – may open the door to improved investment outcomes.

Economic and Market Commentary

Charting the Year Ahead: Investment Ideas for 2026

Marc Seidner, CIO of Non-traditional Strategies, explores opportunities across equities, bonds, credit, and commodities that have the potential to offer investors resilience and diversification.

Cyclical Outlook

Fixed Income: Strong Starting Point, Stronger Potential

Bond returns have been strong – and the opportunity is far from over. With compelling yields and excess return potential across public and private markets, Marc Seidner, CIO non-traditional strategies, shares why fixed income remains a powerful tool for generating durable income and managing risk.