I can only guess that the reasons for items:
Item 3: 1-4 family instead of multi-family may be because of the differences in underwriting for rent rolls vs. income. However, purchases of LMI multi-family pools can still qualify for CRA credit - but perhaps because the analysis and underwriting of those pools is so different from 1-4, no one wants to try and explain them to a Safety and Soundness examiner. Don't forget that your CRA investments will also be reviewed by Safety and Soundnss for liquidity and interest rate risk, etc.
Item 4: This may be an attempt to avoid predatory loans where all of the equity is stripped during the refi. Again, there may be a Safety and Soundness component that a pool of loans that have some borrower equity would be more stable than underwater deals.
Item 5: Again, staying away from predatory loans and for Safety and Soundness concerns that your MBS pool might be comprised of NINJA loans. (No income, no job, applicants)
When I used to review MBS pools, my biggest frustration was the lack of information that was provided with respect to points, APR and overall DTI. When I tried to get the information, I was told time and again, "we don't capture that data and there is no way to do so."
And not long after the market collapsed.
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CRCM,CAMS
Regulations are a poor substitute for ethics.
Just sayin'