Biography

David Rittner is an Investment Strategist for the Structured Finance Team at Loomis, Sayles & Company. He is responsible for aiding the fixed income product teams in constructing and implementing optimal strategies across all segments on securitized assets.

David joined Loomis Sayles in 2021 as a Senior Investment Analyst and was promoted to Investment Strategist in 2023. He has 15 years of investment industry experience. Previously, David was an assistant vice president and fixed income portfolio analyst at Wellington Management, where he helped manage structured finance securities across core, core plus and unconstrained bond funds, generating strategic relative value trades across the capital stack in ABS, CMBS and RMBS. Prior to this, he was an investment associate at JP Morgan Asset Management, where he performed research, traded and managed structured finance bonds for the firm’s absolute return fixed income strategy.

David earned a BS in Economics from the Wharton School of the University of Pennsylvania. He is a CFAĀ® charterholder.

CFAĀ® and Chartered Financial AnalystĀ® are registered trademarks owned by the CFA Institute.

Latest Insights by David Rittner, CFA

Alpha Engine Perspectives
March 19, 2026 • 7 min read

Securitized Credit Exposure to the Middle East Conflict

As geopolitical risk rises, spillover effects on securitized assets are anything but uniform. The Loomis Sayles Structured Finance team examines the implications[…]
Structured Finance
Alpha Engine Perspectives
January 22, 2026 • 6 min read

Three Questions on GSEs’ $200 Billion Agency MBS Purchase Program

Loomis Sayles' Structured Finance Team dissects a new policy initiative directing government-sponsored enterprises (GSEs) to increase their purchases of agency mortgage-backed securities[…]
Structured Finance
Market Commentary & Outlook
January 8, 2026 • 5 min read

2026 Outlook for Structured Finance: Q&A

Investment Strategist David Rittner discusses potential diamonds and landmines within structured finance in 2026.
Structured Finance