I have put together a few ideas, links to make mortgage real estate investment trust (aka mMREITs) easier to understand.
1. Recommended technical Mortgage Backed Securities book:
Mortgage-Backed Securities: Products, Structuring, and Analytical Techniques (Frank J. Fabozzi Series) [Hardcover]
2. mREIT Definitions
3. Hedging mREITs
4. Recommended Option Books
5. SEC Definition of Ex-Dividend Dates
6. Hedging mREITS with Options