Latest Market Research Articles & Ideas

Simple Tests of AMJ as Diversifier

A subscriber suggested testing the diversification power of exchange-traded aggregations of U.S. pipeline Master Limited Partnerships, such as JPMorgan Alerian MLP Index ETN (AMJ), as a distinct asset class. To check, we add AMJ to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for AMJ and the average pairwise correlation of AMJ monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without AMJ. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for AMJ and the above nine asset class proxies from July 2009 (first return available for AMJ) through April 2013 (only 46 monthly returns), we find that: More…

Simple Tests of USO as Diversifier

It is plausible that crude oil as a dominant energy commodity has return characteristics substantially different from those of other commodities and asset classes, and therefore represents a good diversification opportunity. To check, we add the United States Oil Fund (USO) to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for USO and the average pairwise correlation of USO monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without USO. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for USO and the above nine asset class proxies as available from May 2006 (first return available for USO) through April 2013 (84 monthly returns), we find that: More…

Simple Tests of JJC as Diversifier

A subscriber suggested testing the diversification power of iPath DJ-UBS Copper ETN (JJC) as a distinct asset class. To check, we add JJC to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for JJC and the average pairwise correlation of JJC monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without JJC. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for JJC and the above nine asset class proxies from November 2007 (first return available for JJC) through April 2013 (66 monthly returns), we find that: More…

Simple Tests of FRN as Diversifier

Does adding a proxy for the least developed (frontier) equity markets to a diversified portfolio improve its performance? To check, we add Guggenheim Frontier Markets ETF (FRN) to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for FRN and the average pairwise correlation of FRN monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without FRN. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for FRN and the above nine asset class proxies from July 2008 (first return available for FRN) through April 2013 (58 monthly returns), we find that: More…

Simple Tests of VXZ as Diversifier

Market volatility tends to rise as returns fall. Does adding a proxy for intermediate-term U.S. equity market volatility to a diversified portfolio improve its performance? To check, we add iPath S&P 500 VIX Mid-Term Futures (VXZ) to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for VXZ and the average pairwise correlation of VXZ monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without VXZ. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for VXZ and the above nine asset class proxies from March 2009 (first return available for VXZ) through April 2013 (only 50 monthly returns), we find that: More…

Simple Tests of VXX as Diversifier

Market volatility tends to rise as returns fall. Does adding a proxy for short-term U.S. equity market volatility to a diversified portfolio improve its performance? To check, we add iPath S&P 500 VIX Short Term Futures (VXX) to the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

First, per the findings of “Asset Class Diversification Effectiveness Factors”, we measure the average monthly return for VXX and the average pairwise correlation of VXX monthly returns with the monthly returns of the above assets. Then, we compare cumulative returns and basic monthly return statistics for equally weighted (EW), monthly rebalanced portfolios with and without VXX. We ignore rebalancing frictions, which would be about the same for the alternative portfolios. Using adjusted monthly returns for VXX and the above nine asset class proxies from February 2009 (first return available for VXX) through April 2013 (only 51 monthly returns), we find that: More…

Asset Class Diversification Effectiveness Factors

What factors make asset class diversification work? To investigate empirically, we consider the following mix of asset class proxies (the same used in “Simple Asset Class ETF Momentum Strategy”):

PowerShares DB Commodity Index Tracking (DBC)
iShares MSCI Emerging Markets Index (EEM)
iShares MSCI EAFE Index (EFA)
SPDR Gold Shares (GLD)
iShares Russell 1000 Index (IWB)
iShares Russell 2000 Index (IWM)
SPDR Dow Jones REIT (RWR)
iShares Barclays 20+ Year Treasury Bond (TLT)
3-month Treasury bills (Cash)

We calculate the cumulative trajectory for an equally weighted, monthly rebalanced portfolio of all nine asset class proxies. Then we recalculate the trajectory nine times, each time excluding one of them, and relate the resulting terminal values to three individual asset return characteristics: (1) average monthly return; (2) standard deviation of monthly returns; and, (3) average pairwise correlation of returns with the other eight assets. We ignore trading frictions associated with monthly rebalancing, which would be similar for all combinations. Using adjusted monthly returns for the above nine asset class proxies from September 2006 (allowing comparison with the momentum strategy output for the entire set of assets) through April 2013 (80 monthly returns), we find that: More…

Hedging Inflation with Commodities

Can investors rely on commodities to protect against inflation? In their May 2013 paper entitled “Commodities as Inflation Protection”, Andrew Marks, George Crawford and Jim Kyung-Soo Liew examine the belief that commodities represent an intrinsic store of value that hedges against inflation. They use spot prices for commodities because these prices have long histories. They use the U.S. Consumer Price Index (CPI) as the measure of inflation. However, CPI is an aggregate of the prices of many finished goods and services adjusted to reflect a government model of the actual cost of living, so it may not be possible to create a portfolio that tracks its composition. Commodities (such as crops, crude oil and precious metals), as raw inputs to these goods and services, may rise in price with the CPI, and the proliferation of futures contracts and related exchange-traded funds (ETF) makes investing in commodities accessible. Using monthly spot prices for 45 individual commodities and 14 aggregating indexes during January 1960 through December 2012 (53 years), with focus on five subperiods involving relatively high inflation, they find that: More…

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Do Stop Losses Work?

Does systematic use of stop-loss orders (automated position exits based on a cumulative loss threshold) improve net returns? Both the April 2008 paper entitled “Re-examining the Hidden Costs of the Stop-Loss” by Kira Detko, Wilson Ma and Guy Morita and the May 2008 draft paper entitled “When Do Stop-Loss Rules Stop Losses?” by Kathryn Kaminski and Andrew Lo address this question with theory and empi…

Modernizing Equity Return Benchmarks

Does increasingly powerful and more automated trading technology create the need for more sophisticated equity return benchmarks? In the December 2007 version of their paper entitled “130/30: The New Long-Only”, Andrew Lo and Pankaj Patel present a passive but dynamic “plain-vanilla” 130% long/30% short (130/30) benchmark index based on: (1) simple factors (encompassing value, growth, profitability, momentum and technical…

Unfooled by Randomness?

Can people reliably distinguish between actual financial markets time series and randomized data? In the February 2010 draft of their paper entitled “Is It Real, or Is It Randomized?: A Financial Turing Test”, Jasmina Hasanhodzic, Andrew Lo and Emanuele Viola report the results of a web-based experiment designed to test the ability of people to distinguish between time series of returns for eight commonly traded financial assets (inc…

Managing Investment Risk by Parsing Uncertainties

How scientific can economics and finance be? In the March 2010 draft of their paper entitled “WARNING: Physics Envy May Be Hazardous To Your Wealth!”, Andrew Lo and Mark Mueller present a framework to help investors, portfolio managers, regulators and policymakers understand the potential effectiveness and inherent limitations of economics and finance. Focusing on levels of uncertainty (fully reducible, partially…

Adaptive Asset Allocation Policy

Are the relatively placid financial markets of the American Century evolving to a high-volatility regime in a more evenly competitive world? In his December 2011 paper entitled “Adaptive Markets and the New World Order”, Andrew Lo examines the implications of the Adaptive Markets Hypothesis (AMH), wherein “markets are not always efficient, but they are usually highly competitive and adaptive, varying in their degree of efficien…

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