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SEC Filings

10-K
AGNC INVESTMENT CORP. filed this Form 10-K on 02/23/2012
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underlying collateral on a pro rata basis among holders of the securities. Holders of the securities also receive guarantor advances of principal and interest for delinquent loans in the mortgage pools.  
Agency Collateralized Mortgage Obligations. Agency CMOs are securities that are structured instruments representing interests in agency residential pass-through certificates. Agency CMOs consist of multiple classes of securities, with each class having specified characteristics, including stated maturity dates, weighted average lives and rules governing principal and interest distribution. Monthly payments of interest and principal, including prepayments, are typically returned to different classes based on rules described in the trust documents. Principal and interest payments may also be divided between holders of different securities in the Agency CMO and some securities may only receive interest payments while others receive only principal payments.
The agency mortgage-backed securities that we acquire provide funds for mortgage loans made to residential homeowners. These securities generally represent interests in pools of mortgage loans made by savings and loan institutions, mortgage bankers, commercial banks and other mortgage lenders. These pools of mortgage loans are assembled for sale to investors, such as us, by various government-related or private organizations.  
Agency mortgage-backed securities differ from other forms of traditional debt securities, which normally provide for periodic payments of interest in fixed amounts with principal payments at maturity or on specified call dates. Instead, agency mortgage-backed securities provide for a monthly payment, which may consist of both interest and principal. In effect, these payments are a “pass-through” of the monthly interest and principal payments made by the individual borrower on the mortgage loans, net of any fees paid to the issuer, servicer or guarantor of the securities. In addition, principal may be prepaid, without penalty, at par at any time due to prepayments on the underlying mortgage loans. These differences can result in significantly greater price and yield volatility than is the case with traditional fixed-income securities.  
Various factors affect the rate at which mortgage prepayments occur, including changes in the level of and directional trends in housing prices, interest rates, general economic conditions, defaults on the underlying mortgages, the age of the mortgage loan, the location of the property and social and demographic conditions. Additionally, changes to GSE underwriting practices or programs that may or may not be directed or influenced by the President's Administration or by Congress could also significantly impact prepayment rates or expectations. The recently announced enhancements to the Home Affordable Refinance Program, referred to as HARP 2.0, is an example of such a change. Also the pace at which the loans underlying our securities become seriously delinquent or are modified can materially impact the timing of GSE repurchases of these loans from our securities and, thus, the rate of prepayments. Generally, prepayments on agency mortgage-backed securities increase during periods of falling mortgage interest rates and decrease during periods of rising mortgage interest rates. However, this may not always be the case. We may reinvest principal repayments at a yield that is higher or lower than the yield on the repaid investment, thus affecting our net interest income by altering the average yield on our assets.
 When interest rates are declining, the value of agency mortgage-backed securities with prepayment options may not increase as much as other fixed income securities or could even decrease. The rate of prepayments on underlying mortgages affect the price and volatility of agency mortgage-backed securities and may have the effect of shortening or extending the duration of the security beyond what was anticipated at the time of purchase. When interest rates rise, our holdings of agency mortgage-backed securities may experience reduced returns if the owners of the underlying mortgages pay off their mortgages slower than anticipated. This could cause the prices of our mortgage assets to fall more than we anticipated and for our hedge portfolio to underperform relative to the decline in the value of our mortgage assets, thus reducing our net book value. This is generally referred to as “extension risk”.  
Payments of principal and interest on agency mortgage-backed securities, although not the market value of the securities themselves, are guaranteed either by the full faith and credit of the United States, such as those issued by Ginnie Mae, or by a GSE, such as those issued by Fannie Mae or Freddie Mac.  
Agency mortgage-backed securities are collateralized by pools of fixed-rate mortgage loans, adjustable-rate mortgage loans (“ARMs”) or hybrid ARMs. Hybrid ARMs are mortgage loans that have interest rates that are fixed for an initial period (typically three, five, seven or 10 years) and, thereafter, reset at regular intervals subject to interest rate caps. Our allocation of investments among securities collateralized by fixed-rate mortgage loans, ARMs or hybrid ARMs depends on our Manager's assessment of the relative value of the securities, which is based on numerous factors including, but not limited to, expected future prepayment trends, supply and demand, costs of financing, costs of hedging, expected future interest rate volatility and the overall shape of the U.S. Treasury and interest rate swap yield curves.
The types of agency residential pass-through certificates in which we invest, or which may comprise the CMOs in which we invest, are described below.  


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