Print Page  |  Close Window

SEC Filings

Entire Document
Table of Contents

exposure to the CME or other comparable exchanges or trading facilities, as well as their members, is likely to increase in the future.
See “Note 9, Derivative Instruments” for information on the outstanding notional amount and additional information on our risk management derivative contracts as of June 30, 2011 and December 31, 2010, as well as a discussion of our collateral requirements under our derivatives contracts. See “Risk Factors” for a discussion of the impact of decreases in our credit ratings on our collateral obligations under our derivatives contracts. Also see “Risk Factors” in our 2010 Form 10-K for a discussion of the risks to our business posed by interest rate risk and a discussion of the risks to our business as a result of the concentration of our institutional counterparties.
Market Risk Management, Including Interest Rate Risk Management
We are subject to market risk, which includes interest rate risk, spread risk and liquidity risk. These risks arise from our mortgage asset investments. Interest rate risk is the risk of loss in value or expected future earnings that may result from changes to interest rates. Spread risk is the resulting impact of changes in the spread between our mortgage assets and our debt and derivatives we use to hedge our position. Liquidity risk is the risk that we will not be able to meet our funding obligations in a timely manner. We describe our sources of interest rate risk exposure and our strategy for managing interest rate risk and spread risk in “MD&A—Risk Management—Market Risk Management, Including Interest Rate Risk Management” in our 2010 Form 10-K.
Measurement of Interest Rate Risk
Below we present two quantitative metrics that provide estimates of our interest rate exposure: (1) fair value sensitivity of net portfolio to changes in interest rate levels and slope of yield curve; and (2) duration gap. The metrics presented are calculated using internal models that require standard assumptions regarding interest rates and future prepayments of principal over the remaining life of our securities. These assumptions are derived based on the characteristics of the underlying structure of the securities and historical prepayment rates experienced at specified interest rate levels, taking into account current market conditions, the current mortgage rates of our existing outstanding loans, loan age and other factors. On a continuous basis, management makes judgments about the appropriateness of the risk assessments and will make adjustments as necessary to properly assess our interest rate exposure and manage our interest rate risk. The methodologies used to calculate risk estimates are periodically changed on a prospective basis to reflect improvements in the underlying estimation process.
Interest Rate Sensitivity to Changes in Interest Rate Level and Slope of Yield Curve
As part of our disclosure commitments with FHFA, we disclose on a monthly basis the estimated adverse impact on the fair value of our net portfolio that would result from the following hypothetical situations:
  •  A 50 basis point shift in interest rates.
  •  A 25 basis point change in the slope of the yield curve.
In measuring the estimated impact of changes in the level of interest rates, we assume a parallel shift in all maturities of the U.S. LIBOR interest rate swap curve.
In measuring the estimated impact of changes in the slope of the yield curve, we assume a constant 7-year rate and a shift of 16.7 basis points for the 1-year rate and 8.3 basis points for the 30-year rate. We believe the aforementioned interest rate shocks for our monthly disclosures represent moderate movements in interest rates over a one-month period.
Duration Gap
Duration gap measures the price sensitivity of our assets and liabilities to changes in interest rates by quantifying the difference between the estimated durations of our assets and liabilities. Our duration gap analysis reflects the extent to which the estimated maturity and repricing cash flows for our assets are