Sergey Losyev serves as Co-Chief Investment Officer at ARMOUR Residential REIT, Inc. (NYSE: ARR), where he plays a pivotal role in shaping the company's investment strategy and portfolio management. With over two decades of experience in fixed-income markets, particularly in agency mortgage-backed securities (MBS), Losyev joined ARMOUR in 2012 after a distinguished career at leading financial institutions. His expertise has been instrumental in navigating complex interest rate environments and optimizing the REIT's high-quality, leveraged portfolio of residential mortgage investments. Prior to ARMOUR, Losyev was a Senior Portfolio Manager at Pine River Capital Management, where he managed multi-billion-dollar MBS portfolios and developed sophisticated trading strategies. Earlier, he held senior positions at Deutsche Bank as Head of Agency MBS Trading and at Bear Stearns as a Vice President in Structured Products, honing his skills in pricing, hedging, and risk management for mortgage securities. Losyev's achievements include pioneering quantitative models for MBS valuation and contributing to high-performing funds during volatile market periods, earning recognition for his analytical rigor and market foresight. Holding a Master of Science in Financial Engineering from Columbia University and a Bachelor of Science in Applied Mathematics from the Moscow Institute of Physics and Technology, Losyev combines advanced technical knowledge with practical trading acumen. At ARMOUR, he collaborates with Co-CIO Gordon Henderson to drive dynamic hedging techniques, enhance book value stability, and deliver consistent shareholder returns through disciplined capital allocation in the agency MBS space.