Fixed-Income Portfolio Management, Liability-Driven and Index-Based Strategies Flashcards
Immunization
- Is the process of structuring and managing a fixed-income portfolio to minimize the variance in the realized rate of return and to lock in the cash flow yield (internal rate of return) on the portfolio
- The cash flow yield is not the weighted average of the yields to maturity on the bonds that constitute the portfolio
- Asset–liability management
- Liability-driven investing
- Asset-driven liabilities
- Asset–liability management strategies consider both assets and liabilities
- Liability-driven investing takes the liabilities as given and builds the asset portfolio in accordance with the interest rate risk characteristics of the liabilities
- Asset-driven liabilities take the assets as given and structures debt liabilities in accordance with the interest rate characteristics of the assets
Approaches to liability-based mandates
- Cash flow matching
- Duration matching
- Contingent immunization
- Horizon matching (also called combination matching)
- Derivative overlay
Liability-based approaches - key features
Total return approaches - key features
Zero replication
In reference to a zero-coupon bond, means that a liability has been immunized
Contingent immunization
Combines immunization with an active management approach when the asset portfolio’s value exceeds the present value of the liability portfolio
Horizon matching (also called combination matching)
Short-term liabilities are covered by a cash flow matching approach while long-term liabilities are covered by a duration matching approach
Symmetric cash flow matching
- A cash flow matching technique that allows cash flows occurring both before and after the liability date to be used to meet a liability
- Allows for the short-term borrowing of funds to satisfy a liability prior to the liability due date
Expected fixed-income return
E(R) ≈
- Yield income +
- Rolldown return +
- E(Change in price based on investor’s views of yields and yield spreads) −
- E(Credit losses) +
- E(Currency gains or losses)
Yield income (or Current yield)
= Annual coupon payment/Current bond price
Rolldown return
The expected change in price based on investor’s views of yields and yield spreads
- ∆Yield input (55 bps is to be input as 0.0055)
Rolling yield
= yield income + rolldown return
Leveraged portfolio return
- VE = value of the portfolio’s equity
- VB = borrowed funds
- rB = borrowing rate (cost of borrowing)
- rI = return on the invested funds (investment returns)
- rp = return on the levered portfolio
The futures leverage
REPO dollar interest
Rebate rate on securities lending
Convexity and duration with and without embedded options
- With embedded options ⇒ use effective duration and effective convexity
- Without embedded options ⇒ use modified duration and convexity
Types of fixed-income risks
- Non MBS securities
- Interest rate
- Yield curve
- Spread
- Credit
- Optionality
- MBS securities
- Sector
- Prepayment
- Convexity
Tracking risk (also called active risk or tracking error)
- The standard deviation of the portfolio’s active return
- Active return = Portfolio’s return – Benchmark index’s return
- Tracking risk = Standard deviation of the active returns
Total return
The rate of return that equates the future value of the bond’s cash flows with the full price of the bond. The total return takes into account all three sources of potential return: coupon income, reinvestment income, and change in price
The bond equivalent yield (BEY)
- The BEY is a calculation for restating semi-annual, quarterly or monthly discount bond or note yields into an annual yield
- Example: 7.5% on a BEY is 3.75% every six months
Effective duration definition
Measures the sensitivity of the price to a relatively small parallel shift in interest rates (interest rate risk)
Key rate duration definition (also called multifunctional or functional duration)
Measures the sensitivity of the price to nonparallel shift in interest rates. Takes into account rate changes in a specific maturity along the yield curve (yield curve risk)
Macaulay duration formula
- t = the number of days from the last coupon payment to the settlement date
- T = the number of days in the coupon period
- t/T = the fraction of the coupon period that has gone by since the last payment
- PMT = the coupon payment per period
- FV = the future value paid at maturity, or the par value of the bond
- r = the yield-to-maturity, or the market discount rate, per period
- N = the number of evenly spaced periods to maturity as of the beginning of the current period
Macaulay duration for a zero-coupon bond
Is equal to its maturity
Modified duration
= Macaulay duration / (1 + cash flow yield)
Effective duration formula
- PV0 is the initial value
- PV– is the new value after the yield curve is lowered by ΔCurve
- PV+ is the value after the yield curve is raised by ΔCurve
Dollar duration (also called money duration)
= price * modified duration
Spread duration
Refers to the change in a non-Treasury security’s price given a widening or narrowing of the spread compared with the benchmark
Basis Point Value (BPV)
Is a measure of money duration calculated by multiplying the money duration by 0.0001
Portfolio modified adjusted duration
Takes into account option-adjusted duration
Convexity relation to the Macaulay duration
Annualizing Macaulay duration, dipersion and convexity
- Macaulay duration ⇒ divide by the periodicity of the bond
- Dispersion and convexity ⇒ divide by the periodicity2 of the bond