Never Buy Expensive Stocks. Period. by Wesley R. Gray, Ph.D., Alpha Architect Author, Quantitative Value: A Practitioner’s Guide to Automating Intelligent Investment and Eliminating Behavioral Errors
We looked at all our favorites from our JPM paper “Analyzing Valuation Measures: A Performance Horse Race over the Past 40 Years:”
- Gross Profits / TEV
- FCF / TEV
This research is part of a larger academic paper, but I did want to highlight one aspect of our study that we thought more practitioner-minded readers would find fascinating.
Note: We focus our results on EBIT/TEV because it is our preferred measure for identifying “cheapness.” The results for other valuation metrics are quantitatively similar.
How Does Our Simulation Work?
- First, break stocks down into different valuation deciles from 1963 to 2013 based on EBIT/TEV (we only focus on US mid/large cap to avoid weird micro/small cap outlier effects).
For example, if there are 1000 stocks, stocks 1-100 go in the first decile; stocks 101-200 go in the second decile, etc.
- Next, do 1000 simulations of random 30 stock portfolios drawn from the cheap stock decile or the expensive stock decile.
For example, simulation #1 draws 30 random stocks each month from the top and bottom decile from 1963 to 2013. This is the rough equivalent of saying, “we are going to have a monkey throw 30 darts,” every month during the 50 year period, to establish in each month separate 30 stock portfolios. Once our monkey has thrown his 30 darts in each month, we will then have 600 separate monthly portfolios (12 months * 50 years) and will have made 18,000 (30 stocks * 600 months) individual stock picks. This represents one simulation. We do 1000 simulations for the top decile and 1000 simulations for the lowest decile.
- Calculate the performance statistics for each simulated strategy from 1963 to 2013.
Each simulated strategy represents the returns a value-investing monkey (cheap stock buyer) or growth-investing monkey (expensive stock buyer) would achieve over the full time period. We calculate compound annual growth rates (CAGR), standard deviation, and maximum drawdown.
- Tabulate the performance statistics for all 1000 simulations.
We compile the results in the charts/tables below.
What Do the Returns to Value and Growth Look Like?
First, let’s look at the distribution of CAGRs. Notice that there isn’t even a POSSIBILITY of a 30 stock portfolio of expensive stocks beating a portfolio of 30 cheap stocks. This is actually amazing if you ask me. Typically when you run a simulation with 1000 runs you get overlap in the “tails,” or extreme ends of the distribution.
The results are hypothetical results and are NOT an indicator of future results and do NOT represent returns that any investor actually attained. Indexes are unmanaged, do not reflect management or trading fees, and one cannot invest directly in an index. Additional information regarding the construction of these results is available upon request.Below is the table that outlines the simulation details. Take note of the difference in the distributions. Clearly, buying expensive stocks is dangerous to one’s absolute returns.
What Do the Risks to Value and Growth Look Like?
Clearly, cheap beats expensive. But let’s look at standard deviations of the portfolios from our dart-throwing monkeys. First, you’ll notice that standard deviations are tightly bound, even across 1000 simulations. The histograms show another remarkable finding. No matter how you cut it, holding baskets of expensive stocks means more volatility–at least historically.
The results are hypothetical results and are NOT an indicator of future results and do NOT represent returns that any investor actually attained. Indexes are unmanaged, do not reflect management or trading fees, and one cannot invest directly in an index. Additional information regarding the construction of these results is available upon request.Below is the table outlining the standard deviations.
Finally, what about maximum drawdowns associated with cheap and expensive stocks? The evidence below suggests that cheap stocks protect the downside better than expensive stocks. The big drawdowns for value come in the 2008 Financial Crisis, whereas for growth, the largest drawdowns can come from the Internet Bubble burst or the 2008 Financial Crisis.
Important to note, all strategies involve some massive volatility and stomach churning losses. Equity investing is NOT FOR THE FAINT OF HEART!
There is simply no way to “avoid drawdowns” when investing in equity.
The results are hypothetical results and are NOT an indicator of future results and do NOT represent returns that any investor actually attained. Indexes are unmanaged, do not reflect management or trading fees, and one cannot invest directly in an index. Additional information regarding the construction of these results is available upon request.Here is the table of observations:
One can’t even simulate a scenario where a diversified portfolio of 30 expensive stocks can beat the worst performing portfolio of 30 cheap stocks. Why investors allocate to expensive, or “growth,” stocks is beyond me.
Margin of safety IS THE ONLY INVESTING RULE THAT REALLY MATTERS!
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