Selling Guide

The Selling Guide is organized into parts that reflect how lenders generally categorize various aspects of their business relationship with Fannie Mae. To begin browsing, select from any of the sections below. You may also download the entire Selling Guide in PDF format.

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C3-5-06, Commingling ARMs in MBS (02/23/2016)

Introduction

This topic provides information on commingling ARMs, including:


ARM Loan Types Lenders May Commingle in the Same Pool

ARMs originated under the same ARM plan may have original terms up to 30 years and may be commingled in the same ARM pool.


ARM Loan Types Lenders May Not Commingle in the Same Pool

ARMs originated under different ARM plans cannot be commingled in the same pool. In certain cases, however, lenders may be permitted to pool seasoned ARMs in ARM plans with shorter initial fixed-rate periods. Interested lenders should contact their Fannie Mae customer account team to determine what flexibility may be available for a specific situation.

ARMs originated under a single ARM plan, but with different post-conversion disposition options (market rate option or take-out option) cannot be included in the same pool.

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C3-5-03, Calculating the Weighted-Average Pool Accrual Rates for ARM Flex Pools Using a Weighted-Average MBS Margin (04/01/2009)

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