MIP Ch 6: Fixed Income Portfolio Management Flashcards
What are the 4 key activities in the investment management process?
- Setting the investment objective (return, risk, and constraints)
- Developing and implementing a portfolio strategy
- Monitoring the portfolio
- Adjusting the portfolio
List and describe the 5 strategies for managing against a bond market index, from the
least tracking error to most (i.e. passive vs active strategies).
- Pure bond indexing (or full replication)
Attempts perfect match (own all bonds in index)
Rare: expensive and inefficient - Enhanced indexing by matching primary risk factors
Primary risk factors: interest rate level, yield curve twists, and spreads
Cheaper than pure indexing and allows opportunity for higher yield - Enhanced indexing by small risk factor mismatches
Match duration, while actively managing smaller risk factors (sector, quality, etc.) - Active management by larger risk factor mismatches
- Full-blown active management (most aggressive mismatches)
List the 3 reasons for using indexing
- Lower fees than managed accounts
- Outperforming an index (after costs) is difficult to do consistently
- Excellent diversification
Describe the risk factors to consider when choosing an index.
- Market value risk of portfolio should be similar to benchmark
Longer portfolios tend to have higher MV risk - Income risk should be similar to benchmark
Longer portfolios tend to have less income risk - Liability framework risk – should match A/L investment characteristics
Use longer bonds for longer liabilities
Describe the 3 risks that a manager should consider when assessing an index’s
sensitivity.
- Interest rate risk – changes in level of interest rates (parallel shifts)
Largest risk source (90%) - Yield curve risk – changes in yield curve shape (twists, curvature)
- Spread risk – changes in spread over Treasuries (credit risk)
List the primary bond risk factors.
- Duration and convexity – price sensitivity to parallel yield shifts
- Key rate duration and present value distribution of cash flows
- Sector and quality percent
- Sector duration and contribution
- Quality (credit) spread duration contribution
- Sector/coupon/maturity cell weights
- Issuer exposure (manage event risk)
Describe tracking risk and its formula components
Tracking risk = standard deviation of the portfolio’s active return over time
T = total number of time periods (or final time period)
ARt = active return for period t = PortfolioReturnt BenchmarkReturnt
AR = average AR for all time periods
Describe the main disadvantage of using enhanced bond management strategies
Enhanced strategies add costs , must be earned on top of a passive return
Describe strategies to overcome the high costs of enhanced indexing.
- Lower cost enhancements – reduce trading costs and management fees
- Issue selection enhancements – attempt to find undervalued securities
- Yield curve positioning – find consistently mispriced maturities
- Sector and quality positioning (2 forms)
Tilt toward short corporates (high yield spread per unit of duration risk)
Periodic over- or under-weighting of sectors or qualities - Call exposure positioning – e.g. under-weight in callable bonds if you expect
falling interest rates
Describe some additional activities that are carried out by active managers
- Exploit index mismatches (based on manager’s expertise)
- Extrapolate market expectations from market data (e.g. analyze forward rates)
- Independently forecast inputs and compare with market’s expectations
Example: manager may believe forward rates are too high ñ increases duration
mismatch by increasing portfolio duration - Estimate relative values of securities to identify areas of under- or over-valuation
Define total return with respect to bond returns
Total return accounts for coupon income, reinvestment income, and change in price
Semiannual Total Return
Total Future Dollars
Full Price of Bond
1{n
1
n = total semiannual periods in investment horizon
Describe the benefits of scenario analysis
- Assess distribution of possible outcomes (wider distribution = more risk)
- Reverse scenario analysis: determine the IR movements that would trigger
acceptable outcomes - Calculate contribution of individual components (e.g. impact of a yield twist)
- Evaluate merits of entire trading strategy
Describe 2 types of dedication strategies
- Immunization – classical single period and 4 extensions
1.1 Extensions for non-parallel shifts
1.2 Relax the fixed horizon requirement
1.3 Return maximization (risk and return trade-offs)
1.4 Contingent immunization - Cash flow matching
Exact (basic) cash flow matching
2 extensions: symmetric and combination (horizon) matching
List the 2 requirements for classical single period immunization
- Portfolio duration = liability horizon (duration)
- PV of portfolio cash flows = PV of liability cash flows
List the important characteristics of immunization.
- Specified time horizon
- Assured rate of return over a fixed holding period
- Portfolio value at the horizon date is insulated from interest rate changes
Describe 2 ways that a portfolio’s duration can change.
- As market yields change (convexity effects)
- With the passage of time (as the bond approaches maturity)
Define the immunized target rate of return.
Immunized target rate of return = total portfolio return assuming no change in the
term structure
Will only equal YTM if the yield curve is flat
If yield curve is positively sloped, total return < YTM
If yield curve is negatively sloped, total return > YTM
Define portfolio duration and dollar duration
Portfolio Duration
°ni
1 Di Vi
VP
Dollar Duration Portfolio Duration Portfolio Value 0.01
Describe the steps required for rebalancing to the desired level of dollar duration
- Calculate the new (or current) portfolio DD
- Calculate the rebalancing ratio:
Target DD
New DD - Calculate amount of cash needed for rebalancing:
pRebalancing Ratio 1q MV of Portfolio
Define spread duration
Spread duration = change in price if the yield spread changes by 100 bps
Describe how classical immunization can be extended for non-parallel interest rate
shifts
Key rate duration (a.k.a. “multi-functional duration”)
Arbitrary interest rate changes
Set portfolio duration = investment horizon
Changes in portfolio value depend on:
1. Structure of investment portfolio
2. M2 = immunization risk measure (“maturity variance”)
If M2 is small, immunization risk is small
Describe the steps under multiple liability immunization
- Set DA DL
- Asset cash flows must “bracket” liability cash flows
Shortest asset < shortest liability; longest asset > longest liability
Describe the steps for immunizing general cash flows
- Assume future assets are a hypothetical investment
- Invest available funds to mature beyond liability horizon
Portfolio duration should match liability horizon - When the future assets become available:
Invest new funds in assets that will mature at the liability horizon
Sell existing longer assets and reinvest at the liability horizon