Role of equities in the overall portfolio • Equity represents a significant source of wealth • Equity can be found in both individual and institutional portfolios • Equities offer supe
Trang 1Level III
Equity Portfolio Management
Summary
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Trang 2Role of equities in the overall portfolio
• Equity represents a significant source of wealth
• Equity can be found in both individual and institutional portfolios
• Equities offer superior protection against unanticipated inflation
• Equities have provided high returns over the long term relative to other asset classes
Passive, active and semiactive approaches
• Passive Management: Equity market is efficient indexing is the best strategy
– Lower turnover, lower transaction costs and lower taxes relative to active management
• Active Management: Outperform benchmark portfolio by investing in underpriced securities
• Semiactive Management
– Also called enhanced indexing or risk-controlled active management
– Variant of active management
– Outperform benchmark but keep tracking risk in control
On average active management will give the same return as passive management; but active
Trang 3Passive investment vehicles
1) indexed portfolios, 2) equity index futures and 3) equity total return swaps
Indexed portfolio categories
Conventional index mutual funds, exchange-traded funds (ETFs) and separate accounts or pooled accounts
Conventional (Open End) Index Mutual Funds Exchange Traded Funds
Buy/sell shares at market close at NAV Buy/sell any time during trading day
Shareholder accounting at the fund level can be a
significant expense
No fund level shareholder accounting
Low index license fees Higher index license fees
Less tax efficient (because selling shares results in
higher capital gains taxes)
More tax efficient (because in-kind redemption process results in fewer taxable events)
Cost associated with providing liquidity to shareholders
who are selling fund shares
Transaction costs for those buying/selling ETF but those holding shares have protection
Short trades not allowed Short trades allowed
Separate accounts or pooled accounts: When a portfolio is large, the use of separate or pooled accounts is more cost
effective compared to both conventional index mutual funds and exchange traded funds
Trang 4Equity index futures
These are low cost vehicles for obtaining equity market exposure
They have finite lives, and must be rolled over to maintain a long term position
In a portfolio trade, a basket of stocks are traded together
A basket cannot be shorted if any of the components violate the uptick rule This makes trading cumbersome
Because of these reasons ETFs are more popular compared to index futures
Equity total return swaps
They are a relatively low cost way of obtaining long term exposure to an equity market
They major applications are:
o Receive total return of a non-domestic equity index in return for an interest payment to a counterparty that holds underlying equities more tax efficiently
o Use equity swaps to rebalance portfolios because trading securities might be more costly
Passive investment vehicles
Trang 5Approaches to creating a indexed portfolio
Full replication: all stocks in the index are included in the portfolio
o Tracking risk is low and the portfolio only needs to be rebalanced when the index constituents change
o The portfolio return is lower than index return due to: administrative fee, transaction costs, cash drag
Stratified sampling: retain basic characteristics of the index without having to buy all stocks in the index
o Compared to full replication it has lower transaction costs but higher tracking error
Optimization: mathematical approach to index fund creation involving the use of a multifactor risk model
Process
o Risk exposures of the index and individual securities are measured
o An objective function that specifies that securities and weights that minimize expected tracking risk
Advantage:
o Lower tracking risk than stratified sampling
Drawbacks:
o Even the best models can be imperfectly specified
o There can be false signals due to overfitting of data
o Even in the absence of index changes and dividend flows, optimization requires periodic trading to keep the risk characteristics of the portfolio aligned with the risk characteristics of the index being tracked
Trang 6Price weighted:
Each stock is weighted according to absolute share price
The index is biased towards the highest price share
The performance of the index represents the performance of a portfolio that simply bought and held one share of each index component
It is simple to construct The index is the sum of the share prices divided by the number of shares
The DJIA is the most prominent example of a price weighted index
Value weighted:
Each stock is weighted according to its market cap; sub category is float-weighted index
The index is biased towards large companies that have high market-cap and towards overvalued stocks
Equal weighted:
All stocks are weighted equally
The index has a small company bias, because it includes many more small companies
It requires frequent rebalancing because varying stock returns will cause stock weights to drift from the calculated equal weights
Index weighting choices
Trang 7Value investment style: buy stocks that are relatively cheap in terms of purchase price of earnings or assets
The belief is that most investors over-pay for glamor (growth) stocks So it is best to avoid them and look
for value in the not-so-glamorous stocks
Empirical studies show that value style may earn positive return premium relative to market
The main risk of this strategy is that a stock’s cheapness can be misinterpreted A stock may be cheap
because of a good reason, and a value investor may fail to factor this reason
The main sub styles are: low price multiple, high dividend yield, contrarian (low price to book)
Growth investment style: buy stocks which have high earnings growth
The belief is that if earnings go up and P/E stays the same, then stock prices will go up
Growth stocks have high sales growth relative to the market and tend to trade at high P/Es, P/Bs and
P/Ss ratios
If a stock is trading at a premium, growth investors expects this premium to remain
The main risk for a growth investor is that the expected growth does not materialize
The main sub styles are: consistent growth, earnings momentum
Market oriented style falls between value and growth; buy a if the market value is less than intrinsic value
Market capitalization based style: favor stocks based on market capitalization
Investment styles
Trang 8Techniques for identify investment styles
Returns-Based Style Analysis (RBSA)
Focus on characteristics of overall portfolio as revealed by portfolio’s realized returns
Regress the portfolio returns against the return series of a set of security indices
The indices should be 1) mutually exclusive, 2) exhaustive with respect to manager’s investment
universe, and 3) should have distinct sources of risk
The regression coefficients or betas should be non-negative and sum to 1
Holdings-Based Style Analysis
Here we categorize individual securities by their characteristics and aggregate results to reach a conclusion
about the overall style of the portfolio
An analyst may examine the following variables:
o Valuation levels: A value oriented portfolio will have companies with low P/E, P/B ratios
o Forecast EPS growth rate: A growth oriented portfolio will have companies with high forecasted EPS
growth rate
o Earnings variability: A value-oriented portfolio will hold companies with greater earnings variability
because of the willingness to hold companies with cyclical earnings
o Industry sector weighting: Growth oriented portfolios tend to have higher weights for industries such
as IT and healthcare Value oriented portfolios tend to have higher weights for industries such as
Trang 9Advantages Disadvantages Returns-based
style analysis
Characterizes entire portfolio
Facilitates comparisons of portfolios
Aggregates the effect of the investment process
Different models usually give broadly similar results and portfolio characterizations
Clear theoretical basis for portfolio categorization
Requires minimal information
Can be executed quickly; cost effective
May be ineffective in characterizing current style
Error in specifying indices in the model may lead
to inaccurate conclusions
Holdings-based
style analysis
Characterizes each position
Facilitates comparisons of individual positions
In looking at present, may capture changes
in style more quickly than returns-based analysis
Does not reflect the way many portfolio managers approach security selection
Requires specification of classification attributes for style; different specifications may give
different results
More data intensive than returns-based analysis
Trang 10Methodologies to construct indices
A security may be assigned:
to value exclusively or to growth exclusively in all instances
to value exclusively or to growth exclusively but only if the value of some characteristic exceeds
or is less than a specified threshold value
in part to growth and in part to value
The style box is a popular method of characterising a portfolio’s style The most widely
recognized version of the style box is the Morningstar style box
Style drift occurs when a portfolio manager deviates from his original stated style objective Professional investors view inconsistency in style, or style drift, as an obstacle to investment planning and risk control because:
Investor does not get the desired exposure to a particular style
The manager may be operating in an area outside his expertise
Morningstar Style Box for Vanguard Mid-Cap Growth Fund
Trang 11Socially responsible investing (SRI), also called ethical investing, integrates ethical values and social concerns
with investment decisions SRI criteria may include:
industry classification, reflecting concern for sources of revenue judged to be ethically questionable
(tobacco, gaming, alcohol, and armaments are common focuses); and
corporate practices (for example, practices relating to environmental pollution, human rights, labor
standards, animal welfare, and integrity in corporate governance)
Negative screen example: investor refuses to invest in an alcohol, tobacco or armaments company
Positive screen example: investor only wishes to invest in companies that have good corporate practices
Long-short investing: exploit constraint that many investors face related to short sales The belief is that since
many investors cannot take short positions, stocks may become overvalued
Pair’s trade: long an undervalued stock and short an overvalued stock from the same industry
Price inefficiency on the short side The reasons for price inefficiencies can be:
Many investors only look for undervalued stocks
Management fraud, window dressing, negligence
Bias towards ‘buy’ recommendations
Sell-side analysts may be reluctant to issue negative opinions
Investment strategies
Trang 12Equitized long-short strategy: Market-neutral portfolio can be equitized (given equity market exposure) by
taking a long position in equity futures contracts Appropriate when investor wants to add an equity beta to
skill-based active returns from a short investment manager Overall return: active return from
long-short portfolio + gain/loss from futures position + interest on cash from long-shorting securities
Short extension strategy: Long-only constraint limits an investor’s ability to benefit from an extreme
negative view on a stock Extension strategies partially relax the long-only constraint by specifying the level
of short selling allowed For example 130/30 means an investor can short 30% of the portfolio value and use
the proceeds to go long on 130% of the portfolio value Advantages:
• Does not need a liquid futures, swaps or ETF market
• Increase in the proportion of a manger’s investment insight that is incorporated in the portfolio
• Gain market return and earn alpha from the same source
Investment strategies
Strategies for when to sell:
Substitution: replace existing holding when another stock offers higher risk-adjusted return
Rule based: Sell when a certain rule or criteria is met For example a value investor might sell if the P/E ratio rises above a certain level
Implications of sell discipline need to be evaluated on an after-tax and after-transaction cost basis
Trang 13Semi-active equity strategies
Derivatives based
Manager obtains exposure to the desired equity market through a derivative
The enhanced return is obtained through something other than equity
For example, if a manager is equitizing cash i.e holding cash and an long position in an equity futures
contract, then he can enhance his returns by altering the duration of the underlying cash If the yield
curve is upward sloping, he would invest in 3 year notes instead of 90 day bills to get additional returns
Stock based
Manager tries to generate alpha by identifying stocks that are underpriced or overpriced
If manager has no opinion on a stock then it will be kept at benchmark weight
Risk is controlled by limiting the degree to which a stock can be underweighted or overweighted
Strategies can be compared using the information ratio
IR = Active Return / Active Risk ≈ IC Breadth
Trang 14Optimal portfolio allocations to a group of investment managers
The combination of equity mangers that will maximize the active returns for a given level of active risk (determined by the investor’s level of aversion to active risk) is obtained by the following objective function
Maximize by choice of managers UA = rA − λ𝐴σA2
where,
UA = expected utility of the active return of the manager mix
rA= expected active return of the manager mix
λ𝐴 = the investor’s trade-off between active risk and active return; measures risk aversion in active risk terms
σ𝐴2 = variance of the active return
Manager selection
• Develop universe of suitable manager candidates
• Study past results
• Evaluate investment process and strength of manager’s organization
• Evaluate fee structure (ad valorem fees, performance fees)
Trang 15Active risk and return
Portfolio active return = hAirAi
n
i=1
Portfolio active risk = hAi2 σAi2
n
i=1
Information ratio = active risk / active return
True active return = Manager’s return − Manager’s normal benchmark
Misfit return = Manager’s normal benchmark − Investor’s benchmark
Manager’s total active risk = *(Manager’s “true” active risk)2 + (Manager’s “misfit” active risk)2]½
Where,
h Ai = the weight assigned to the ith manager
σAi = the active risk of the ith manager
Assuming no correlation between active returns