Combining Low Volatility and Dividend Yield in U.S ...
RESEARCH Smart Beta
CONTRIBUTORS
Hong Xie, CFA Director Global Research & Design hong.xie@
Aye M. Soe, CFA Managing Director Global Research & Design aye.soe@
Rachel Du Senior Analyst Global Research & Design rachel.du@
Combining Low Volatility and Dividend Yield in U.S. Preferred Stocks
INTRODUCTION
Preferred stocks are hybrid securities that sit between common stocks and bonds in a company's capital structure, therefore exhibiting blended characteristics of both asset classes. They have been favored by incomeseeking investors due to the higher yields they offer in comparison with common stocks and corporate bonds.
Historically, dividends have been a dominating driver for the total return of preferred stocks. Therefore, many preferred strategies seek to capture the benefit of higher-dividend-yielding preferred stocks.
However, as with any income-oriented strategy, it is important to avoid falling into a yield trap. In particular, our research in equity dividends has shown that securities in the top quintile of the yield-ranked universe have higher volatility and lower risk-adjusted returns than those in other quintiles.1 Similarly, this paper shows that higher-dividend-yielding preferred stocks also tend to exhibit higher volatility, and therefore an income strategy may require some form of volatility management for prudent portfolio construction.
Against that backdrop, we applied the low volatility factor, which is popular in equity investing, to preferred stocks. The low volatility effect refers to the finding that, historically, stocks with low volatility have tended to outperform their high volatility peers on a risk-adjusted basis. It has been extensively studied in equities by academics and practitioners alike and stock investment vehicles linked to low volatility strategies have grown significantly. Our analysis shows that the low volatility factor can be overlaid with a high-dividend strategy in preferred stocks to manage volatility while maintaining attractive yield levels.
The remainder of this paper is organized as follows. The first section explores a high-dividend investment strategy and extends the study of the low volatility effect in U.S. preferred stocks. The second section introduces the methodology of the S&P U.S. Preferred Stock Low Volatility High
1 Luk, Priscilla. "The Beauty of Simplicity: The S&P 500 Low Volatility High Dividend Index." S&P Dow Jones Indices LLC. November 2017.
Combining Low Volatility and Dividend Yield in U.S. Preferred Stocks
August 2018
Historically, dividend income contributes significantly to the total return of preferred stocks.
Dividend Index. The third and fourth sections present back-tested performance and characteristics of the index, respectively.
HIGH-DIVIDEND INVESTING AND LOW VOLATILITY EFFECT IN PREFERRED STOCKS
Preferred Stock Total Return Analysis
Preferred stocks exhibit blended characteristics of stocks and bonds. They represent ownership in companies, but they do not come with voting rights. Given their junior position to bonds in capital structure, preferred stocks generally offer higher yield than senior bonds, and higher stable dividends than common stocks, and therefore are popular instruments for incomeseeking investors.
Historically, dividend income contributes significantly to preferred stock total return. To illustrate, Exhibit 1 compares the price returns and total returns of the S&P U.S. Preferred Stock Index and S&P 500?. From its inception in 2003 until May 31, 2018, the S&P U.S. Preferred Stock Index generated a cumulative total return of 114.8%, while its price return was -22%. This is in contrast with the S&P 500, for which total return followed price return closely, and price return contributed 64% of the total return since 2003.
Exhibit 1: Price Return and Total Return of Preferred Stocks and Common
Stocks
S&P U.S. Preferred Stock Index 250
Price Return
Total Return 200
S&P 500
400
Price Return
350
Total Return
300
150
250
Return (%) Return (%)
100
200
150
50 100
0
50
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
AVERAGE MONTHLY RETURN (%)
CUMULATIVE RETURN (%)
INDEX
PRICE RETURN
TOTAL RETURN
PRICE RETURN CONTRIBUTION TO
TOTAL RETURN
PRICE RETURN
TOTAL RETURN
PRICE RETURN CONTRIBUTION TO
TOTAL RETURN
S&P U.S. Preferred Stock Index
-0.03
0.5
-6 -22.4 114.8
-20
S&P 500
0.6
0.8
79 171.6 267.6
64
Source: S&P Dow Jones Indices LLC. Data from Sept. 30, 2003, to May 31, 2018. Past performance is no guarantee of future results. Charts and table are provided for illustrative purposes and reflect hypothetical historical performance. Please see the Performance Disclosure at the end of this document for more information regarding the inherent limitations associated with back-tested performance.
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Combining Low Volatility and Dividend Yield in U.S. Preferred Stocks
August 2018
The highest-dividendyielding quartile showed the highest total return, but it also exhibited the highest return volatility.
Preferred stocks pay fixed or floating dividends with a preset schedule. Given the fact that dividends drive preferred stock total return, it makes sense that most preferred strategies seek to capture the income benefit of selecting high-dividend-yielding securities.
For the purpose of this paper, we used the S&P U.S. Preferred Stock Index to represent the U.S. preferred stock universe, or the opportunity set. The index's first value date was in September 2003, and its universe expanded significantly in October 2010 due to the methodology change that removed the limit to the number of lines of a single company's preferred stock that were allowed in the index. Therefore, we present our analysis for pre-2010, post-2010, and the full period separately, emphasizing the post-2010 period due to the increase in the size of the universe.
High-Dividend Strategy in Preferred Stocks
To compare the performance of high-dividend-yielding and low-dividendyielding preferred stocks, we constructed quartile portfolios by dividing the preferred stock universe into quartiles ranked by current dividend yield. The quartile portfolios were rebalanced on a monthly basis and equally weighted.
Exhibit 2 presents back-tested performance for the quartile portfolios in three data periods. The highest-dividend-yielding quartile showed the highest total return, but it also exhibited the highest return volatility. Interestingly, the lowest-dividend-yielding quartile posted the lowest return but was not the least volatile. Consequently, its ratio of return to volatility was significantly lower than the other three quartiles, indicating its inefficiency in generating return for the volatility it exhibited. The lowestdividend-yielding quartile was also the only quartile that consistently showed much lower return than the universe.
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Combining Low Volatility and Dividend Yield in U.S. Preferred Stocks
August 2018
Return/Volatility
Return/Volatility Return and Volatility
Return and Volatility
Exhibit 2: Risk/Return Profile for Quartile Portfolios by Current Dividend Yield
50%
October 2003-October 2010
0.8
15%
November 2010-May 2018
38.3%
40%
0.6
30%
22.4%
20%
10%
0%
26.5%
17.4%
5.1%
6.8%
25.7%
0.4
24.0%
0.2
6.2%
0.0
-0.2
10% 8.9%8.3% 5%
7.5% 5.4%
6.7%
6.2%
4.9% 4.3%
2.0
6.9%
1.0
5.7%
-10%
-0.4
-10.8%
-20%
-0.6
Highest Second- Third- Lowest S&P U.S.
Dividend Highest Highest Dividend Preferred
Yield Dividend Dividend Yield Yield Yield
Stock Index
0%
0.0
Highest Second- Third- Lowest S&P U.S.
Dividend Highest Highest Dividend Preferred
Yield Dividend Dividend Yield Stock
Yield Yield
Index
Return
Volatility
Return/Volatility
Full Period: October 2003 - May 2018
30%
27.2%
0.6
Return/Volatility
Return and Volatility
20%
15.2%
10%
18.7% 6.3%
12.5% 6.8%
18.4%
0.4 17.1%
0.2
6.5% 0.0
0% -0.2
-3.3%
Highest Dividend Yield Second-Highest Third-Highest Dividend Lowest Dividend Yield S&P U.S. Preferred
Dividend Yield
Yield
Stock Index
-10%
-0.4
Dividend yield quartile portfolios are hypothetical portfolios.
Source: S&P Dow Jones Indices LLC and FactSet. Data as of May 31, 2018. Past performance is no guarantee of future results. Charts are
provided for illustrative purposes and reflect hypothetical historical performance. Please see the Performance Disclosure at the end of this
document for more information regarding the inherent limitations associated with back-tested performance.
This quartile analysis demonstrates the potential of applying a high-dividend investment strategy to preferred stocks, but it also exposes the cost of owning the most volatile preferred stocks. To construct a risk-efficient portfolio while capturing the benefit of high-dividend-yielding preferred stocks, it is important that the portfolio construction process take extra steps to manage volatility. It is for this purpose that we applied the low volatility effect analysis to the preferred stock universe.
The Low Volatility Effect in Preferred Stocks
The low volatility effect in equities refers to the finding that stocks that previously exhibited lower realized volatility tend to outperform those with higher volatility and the broad-based market on a riskadjusted basis over the long-term investment horizon. It has been well documented in academic and practitioner research and widely adopted in investment product offerings in the market.
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Combining Low Volatility and Dividend Yield in U.S. Preferred Stocks
August 2018
The highest volatility quartile consistently did not compensate for that higher risk with extra return, therefore resulting in significantly lower risk-adjusted return.
Our research in the equity dividend space shows that securities in the top quintile of the yield-ranked universe had higher volatility and lower riskadjusted returns than those in other quintiles. After screening out the most volatile stocks from the high-yielding universe, the resulting portfolio had higher risk-adjusted returns than a simple highest-yielding portfolio and the broad market.2
Adapting that framework, we extended the low volatility analysis to U.S. preferred stocks to examine whether overlaying the volatility signal improved risk-adjusted returns and provided better downside protection.
To do so, we divided the index universe into quartiles by the preferred stocks' realized volatility over the past one-year period.3 The quartile portfolios were rebalanced on a monthly basis and equally weighted.
Exhibit 3 shows the risk/return profile for the quartile portfolios over the three time periods. As expected, the least volatile quartile had the lowest volatility across all three time periods, with the opposite observed for the most volatile quartile. Similar to the findings in equities, the results confirmed that ex-ante ranking of preferred securities by realized volatility can be effective in predicting ex-post volatility.
On the other hand, return variation among the quartiles was not as linear or monotonic. For example, in the post-2010 period, return increased from the lowest volatility quartile to the second and third quartiles but then decreased for the highest volatility quartile. This means the incremental volatility of the highest volatility quartile from the third quartile is not compensated with return. Consequently, the risk-adjusted return, calculated as the ratio of return to volatility, was lowered from 1.12 for the third quartile to 0.60 for the most volatile quartile. The top two least volatile quartiles outperformed the investment universe as a whole in terms of riskadjusted return.
Our quartile analysis indicates the potential of a low volatility factor strategy to reduce return volatility of a U.S. preferred stock portfolio. In particular, the most volatile quartile consistently did not compensate for that higher risk with extra return, therefore resulting in significantly lower risk-adjusted return.
2 Luk, Priscilla. "The Beauty of Simplicity: the S&P 500 Low Volatility High Dividend Index." S&P Dow Jones Indices. November 2017.
3 For empirical evidence on why realized volatility was used, please refer to "Can Realized Volatility Predict Future Volatility for Preferred Securities?"
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