Mortgage Backed Sector of the Bond Market LOS

Hello,

Reading 51 in the CFA book includes the topics such as Floating-Rate Tranches and Structured Interest-Only Tranches and these are not mentioned in the LOS for this reading. Do we need to know these?

Also, Would we need to know the formula for calculating the average life?

Thanks in advance!

Never mind. I found more information on this topic by searching the forum history.