FlexShares Disciplined Duration MBS Index Fund (MBSD) seeks to track the Northern Trust Disciplined Duration MBS Index, which measures the performance of U.S. agency mortgage-backed securities with duration risk actively managed to stay within a target range. This fixed-income ETF provides exposure to government-sponsored enterprise mortgage bonds while attempting to reduce interest rate sensitivity.
How It Works
MBSD uses a rules-based approach that dynamically adjusts portfolio duration based on market conditions and yield curve positioning. The fund holds agency MBS from Fannie Mae, Freddie Mac, and Ginnie Mae, with duration typically maintained between 3-7 years through systematic rebalancing. Portfolio composition changes monthly based on the index methodology that considers interest rate volatility, credit spreads, and prepayment risk to optimize risk-adjusted returns.
Key Features
- Disciplined duration management reduces interest rate risk compared to traditional MBS ETFs through systematic rebalancing
- Focuses exclusively on agency MBS, eliminating credit risk while maintaining government backing and liquidity
- Launched in 2020 with 3.11% dividend yield, targeting income investors seeking mortgage market exposure
Risks
- This ETF can lose value when interest rates rise rapidly, as mortgage bonds are sensitive to rate changes despite duration management
- Prepayment risk occurs when homeowners refinance mortgages early during rate declines, reducing the fund's higher-yielding holdings
- Credit spread widening during financial stress can cause temporary price declines even with government-backed securities
Who Should Own This
Best suited for conservative income investors with 2-5 year time horizons seeking steady dividend income with lower interest rate risk than traditional bond funds. Appropriate as a satellite holding (5-15% of fixed-income allocation) for investors with low-to-medium risk tolerance who want mortgage market exposure without credit risk.