Consumer demand drives the cash flows of consumer-oriented companies. Thus, they should serve as a reliable source of information to predict future fundamentals above and beyond the information contained in financial statements and readily available market data. For example, Jiekun Huang, author of the 2018 study “The Customer Knows Best: The Investment Value of Consumer Opinions,” analyzed abnormal customer ratings from and related them positively to a firm’s revenues and future stock returns; and Kenneth Froot, Namho Kang, Gideon Ozik and Ronnie Sadka, authors of the 2016 study “What Do Measures of Real-Time Corporate Sales Tell Us About Earnings Surprises and Post-Announcement Returns?,” constructed signals using location data from mobile devices as proxies for retail corporate sales and linked them to a firm’s future sales growth and earnings surprises.          

Tarun Gupta, Edward Leung and Viorel Roscovan contribute to the literature with their study “Consumer Spending and the Cross-Section of Stock Returns,” published in the July 2022 issue of The Journal of Portfolio Management, in which they examined a direct measure of consumer demand, daily credit and debit card transactions data for a sample of U.S. consumer-facing firms to identify a link between consumer spending transactions and a firm’s earnings surprises as well as it subsequent stock returns. They began by noting:

Our measure is more timely and available at higher frequency compared with traditional accounting and market data and is less noisy than alternative proxies derived from customer ratings or search patterns. Although typical financial statements are released quarterly with one to two months delays, our data are available at daily frequency and are mostly available within a week after a transaction occurred. As such, credit and debit card transactions-based data can serve as a more timely and reliable source to resolve information asymmetries around earnings announcements.

Their database was aggregated credit and debit card transactions data from 2013 to 2019 for a sample of U.S. consumer-facing firms provided by a leading alternative data, analytics and hosting service vendor with more than 20 years of experience serving more than 900 clients and more than five million consumers across the retail, consumer goods and financial services industries. It contained daily entries on sales volumes, number of consumers and number of transactions for more than 2,000 merchants including public, private and brand levels. Their final sample of public companies included, on average, 171 large-cap companies and 170 small-cap companies.

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.

Following is a summary of their findings:

  • Consumer spending data positively predicted various measures of a company’s future earnings surprises up to three quarters in the future—explaining a statistically significant (at the 1 percent confidence level) 17 percent of the variation of earnings surprises.
  • The predictive power was strong in both large- and small-cap universes of consumer discretionary firms, was robust to the type of transactions data considered (credit card, debit card or both), although the relationship was stronger in the small-cap universe, and was robust to subperiod samples.
  • Taking long-short positions in the top/bottom tercile of stocks ranked on their real-time sales signal generated statistically and economically significant returns of 16 percent per annum net of transaction costs and after controlling for common sources of systematic factor returns (size, value, price momentum, earnings momentum and profitability).
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.
  • Their long-short portfolio had some positive exposure to price momentum and negative exposure to value—an intuitive finding given the negative correlation between momentum and value.

Their findings led Gupta, Leung and Roscovan to conclude:

Our article brings forward substantial evidence that valuable information can be extracted from alternative higher-frequency data source allowing sophisticated investors to construct alternative factors that would provide them with an edge in identifying trading opportunities.

Investor Takeaways

With market efficiency, a company’s sales data should be directly incorporated into a firm’s price. Gupta, Leung and Roscovan showed that the market was not highly efficient, as they were able to predict positive earnings surprises and thus generate positive post-announcement returns. However, before jumping to conclusions, you should consider the evidence on the decaying of anomalies post-publication of findings. For example, David McLean and Jeffrey Pontiff, authors of the 2015 study “Does Academic Research Destroy Stock Return Predictability?,” found that the average characteristic’s return had a “56% post-publication decay.” And Paul Calluzzo, Fabio Moneta and Selim Topaloglu, authors of the October 2019 study “When Anomalies Are Publicized Broadly, Do Institutions Trade Accordingly?” examined the trading behavior of institutional investors in 14 well-documented anomalies and found similar evidence. These findings demonstrate the important role that both academic research and institutional investors (acting as arbitrageurs) play in making markets more efficient.

While markets are not perfectly efficient, as Andrew Berkin and I discuss in “The Incredible Shrinking Alpha,” they persistently move toward greater efficiency as researchers uncover and publish findings of anomalies, and sophisticated investors exploit those anomalies, causing them to shrink or even disappear—the adaptive markets hypothesis. Thus, for investors, the important question is whether the publication of this research can impact the future returns of the strategy employed by Gupta, Leung and Roscovan. Asking it is crucial on two fronts.

First, if anomalies are the result of behavioral errors, or even investor preferences, and the publication of research into them draws the attention of sophisticated investors, it’s possible that post-publication arbitrage would cause the premiums to disappear. Those seeking to capture these identified premiums could quickly move prices in a manner that reduces the return spread between assets with high and low exposure to the characteristic. However, limits to arbitrage, such as aversion to shorting, and its high cost, can prevent arbitrageurs from fully correcting behavioral pricing mistakes. And the research shows that this tends to be the case when mispricing exists in less-liquid stocks where trading costs are high. Second, even if the premium is fully explained by economic risks (risks which cannot be arbitraged away), as more cash flows into the funds acting to capture the premium, the size of the premium is affected.

As you consider that Gupta, Leung and Roscovan’s findings of the large return premium for stocks of companies with the strongest consumer sales cannot be related to risk (stronger sales intuitively are related to less risk), keep the following in mind: The knowledge of the anomaly is now in the public domain, and sophisticated investors like hedge funds and high-frequency traders have access to the same data. Thus, it seems highly likely that sophisticated institutional investors would act on that knowledge and arbitrage away the premium, especially in the highly liquid large-cap universe where limits to arbitrage do not present hurdles. Even in the small-cap universe, the size of the premium found should attract capital and cause it to shrink dramatically, if not entirely disappear.

The bottom line is that while Gupta, Leung and Roscovan’s research provided new insights into the cross-section of returns, investors should be skeptical of their claim that “valuable information can be extracted from alternative higher-frequency data source allowing sophisticated investors to construct alternative factors that would provide them with an edge in identifying trading opportunities.” Forewarned is forearmed.


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About the Author: Larry Swedroe

Larry Swedroe
As Chief Research Officer for Buckingham Strategic Wealth and Buckingham Strategic Partners, Larry Swedroe spends his time, talent and energy educating investors on the benefits of evidence-based investing with enthusiasm few can match. Larry was among the first authors to publish a book that explained the science of investing in layman’s terms, “The Only Guide to a Winning Investment Strategy You’ll Ever Need.” He has since authored seven more books: “What Wall Street Doesn’t Want You to Know” (2001), “Rational Investing in Irrational Times” (2002), “The Successful Investor Today” (2003), “Wise Investing Made Simple” (2007), “Wise Investing Made Simpler” (2010), “The Quest for Alpha” (2011) and “Think, Act, and Invest Like Warren Buffett” (2012). He has also co-authored eight books about investing. His latest work, “Your Complete Guide to a Successful and Secure Retirement was co-authored with Kevin Grogan and published in January 2019. In his role as chief research officer and as a member of Buckingham’s Investment Policy Committee, Larry, who joined the firm in 1996, regularly reviews the findings published in dozens of peer-reviewed financial journals, evaluates the outcomes and uses the result to inform the organization’s formal investment strategy recommendations. He has had his own articles published in the Journal of Accountancy, Journal of Investing, AAII Journal, Personal Financial Planning Monthly, Journal of Indexing, and The Journal of Portfolio Management. Larry’s dedication to helping others has made him a sought-after national speaker. He has made appearances on national television shows airing on NBC, CNBC, CNN, and Bloomberg Personal Finance. Larry is a prolific writer and contributes regularly to multiple outlets, including Advisor Perspective, Evidence Based Investing, and Alpha Architect. Before joining Buckingham Wealth Partners, Larry was vice chairman of Prudential Home Mortgage. He has held positions at Citicorp as senior vice president and regional treasurer, responsible for treasury, foreign exchange and investment banking activities, including risk management strategies. Larry holds an MBA in finance and investment from New York University and a bachelor’s degree in finance from Baruch College in New York.