Yihai Yu

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Yihai Yu

Yihai Yu
Global Head of Mortgage Research

About the Contributor

Yihai Yu is an Executive Director and Global Head of Mortgage Research, focusing on development of mortgage models and research strategies. Previously, Yihai was a Director at Credit Suisse and Head of Agency MBS Modeling. Yihai received his Ph.D. in Physics and an M.S. in Computer Science from the University of Georgia.

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Blog posts by Yihai Yu


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  1. Aligning prepayment speeds of Fannie Mae and Freddie Mac securities presents a major challenge to the success of uniform mortgage-backed securities (UMBS), which the two government-sponsored enterprises will launch on June 3.

  2. Fannie & Freddie will conclude Single Security Initiative (SSI) June 3, 2019, creating a single to-be-announced (TBA) market & a new TBA security: the uniform mortgage-backed security (UMBS)

  3. How could potential changes in U.S. mortgage policy and possible long-term industry trends affect mortgage-related fees and rate spreads?

  4. Will U.S. homeowners slow down the heady prepayment rate on their mortgages — even if interest rates remain unchanged, thus potentially harming returns of mortgage-backed securities (MBS) and extending the duration of these securities?

  5. Bond investors lost $1 trillion during “the great bond massacre”1 of 1994, which was triggered by the Federal Reserve’s aggressive tightening of interest rates. Many U.S. mortgage-backed securities (MBS) investors and broker-dealers misjudged the risk that fixed-rate prime mortgage borrowers would defer prepayments due to market conditions. This risk — known as “extension risk” — means that borrowers may hold onto mortgages longer than previously expected.