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Managing Bond Portfolios. Basic Strategies. Active strategy Trade on interest rate predictions Trade on market inefficiencies Passive strategy Control risk Balance risk and return. Bond Pricing Relationships. Inverse relationship between price and yield.
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Managing Bond Portfolios www.pptmart.com
Basic Strategies • Active strategy • Trade on interest rate predictions • Trade on market inefficiencies • Passive strategy • Control risk • Balance risk and return www.pptmart.com
Bond Pricing Relationships • Inverse relationship between price and yield. • An increase in a bond’s yield to maturity results in a smaller price decline than the gain associated with a decrease in yield. • Long-term bonds tend to be more price sensitive than short-term bonds. www.pptmart.com
Bond Pricing Relationships (cont’d) • As maturity increases, price sensitivity increases at a decreasing rate. • Price sensitivity is inversely related to a bond’s coupon rate. • Price sensitivity is inversely related to the yield to maturity at which the bond is selling. www.pptmart.com
Duration • A measure of the effective maturity of a bond. • The weighted average of the times until each payment is received, with the weights proportional to the present value of the payment. • Duration is shorter than maturity for all bonds except zero coupon bonds. • Duration is equal to maturity for zero coupon bonds. www.pptmart.com
Duration: Calculation www.pptmart.com
Duration Calculation: Spreadsheet 16.1 8% Time Payment PV of CF Weight C1 X Bond years (10%) C4 .5 40 38.095 .0395 .0197 1 40 36.281 .0376 .0376 1.5 40 34.553 .0358 .0537 2.0 1040 855.611 . 8871 1.7742 sum 964.540 1.000 1.8852 www.pptmart.com
Duration/Price Relationship Price change is proportional to duration and not to maturity. P/P = -D x [(1+y) / (1+y) D* = modified duration D* = D / (1+y) P/P = - D* x y www.pptmart.com
Rules for Duration Rule 1 The duration of a zero-coupon bond equals its time to maturity. Rule 2 Holding maturity constant, a bond’s duration is higher when the coupon rate is lower. Rule 3 Holding the coupon rate constant, a bond’s duration generally increases with its time to maturity. Rule 4 Holding other factors constant, the duration of a coupon bond is higher when the bond’s yield to maturity is lower. www.pptmart.com
Rules for Duration (cont’d) Rules 5 The duration of a level perpetuity is equal to: Rule 6 The duration of a level annuity is equal to: www.pptmart.com
Rules for Duration (cont’d) Rule 7 The duration for a corporate bond is equal to: www.pptmart.com
Duration and Convexity Price Pricing Error from convexity Duration Yield www.pptmart.com
Correction for Convexity Correction for Convexity: www.pptmart.com
Passive Management • Bond-Index Funds • Immunization of interest rate risk: • Net worth immunization Duration of assets = Duration of liabilities • Target date immunization Holding Period matches Duration • Cash flow matching and dedication www.pptmart.com
Active Management: Swapping Strategies • Substitution swap • Inter-market swap • Rate anticipation swap • Pure yield pickup • Tax swap www.pptmart.com
Yield Curve Ride Yield to Maturity % 1.5 1.25 .75 Maturity 3 mon 6 mon 9 mon www.pptmart.com
Contingent Immunization • A combination of active and passive management. • The strategy involves active management with a floor rate of return. • As long as the rate earned exceeds the floor, the portfolio is actively managed. • Once the floor rate or trigger rate is reached, the portfolio is immunized. www.pptmart.com
Interest Rate Swaps • Contract between two parties to exchange a series of cash flows • One party pays a fixed rate and receives a variable rate • One party pays a variable rate and receives a fixed rate • Payments based on notional principal www.pptmart.com
Swap Example Figure 16-11 6.95% 7.05% 7% Swap Dealer Company A Company B LIBOR LIBOR LIBOR www.pptmart.com