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A Big Argument for Buying and Then Monitoring "Credit News 24"

By Charles Rotblut, CFA, AAII

A study showing that most stocks have failed to outperform one-month Treasury bills has been the topic of some discussion this year. The analysis, conducted by Arizona State University finance professor Hendrick Bessembinder, found that slightly more than four out of seven stocks have realized worse returns than one-month Treasuries. The finding drew attention, but there is far more to the study than just a quick soundbite. His study also reinforces the need to follow a disciplined approach toward investing.


Bessembinder calculated lifetime returns for stocks. He looked at all stocks included in the Center for Research in Security Prices (CRSP) database for the period of 1926 through 2016. A stock’s lifetime was measured as the first month and last month it was included in the database. A stock was removed if it was acquired, merged, liquidated or delisted from an exchange. Out of the nearly 26,000 stocks that Bessembinder analyzed, more than a third (35%) were delisted. Fewer than one of 10 stocks within this subset realized a positive lifetime return, and an even smaller number had lifetime returns in excess of one-month Treasury bills.

Obviously, if the long-term return for stocks in aggregate is positive and a big group of losers exists, then there must be winners. Three out of five stocks (60%) categorized as “Still Trading” have lifetime returns in excess of one-month Treasury bills. A slightly higher proportion (63%) of stocks in the “Merger, Exchange or Liquidation” group beat one-month Treasury bills over their lifetimes.

It’s not just winners versus losers; skewness also plays a role, particularly in terms of big winners. The 50 best-performing stocks accounted for more than 39% of the net stock market’s wealth creation. Furthermore, slightly less than 1,100 stocks “collectively account for all of the net wealth creation in the U.S. stock market since 1926,” wrote Bessembinder. This is possible because while the lowest lifetime return a stock can have is 100% (a drop in price to $0), the highest possible return is infinite on a theoretical basis. As such, big positive returns realized by a small group of stocks can more than offset negative returns by a large number of stocks.

It should be emphasized that Bessembinder looked at lifetime returns for individual stocks. These returns are not representative of the returns investors actually realize. Most investors buy a stock after it has already been listed and sell it before it is delisted. During this interim period, a stock could realize large positive returns even if its lifetime return is negative. The key to catching a stock during its favorable period(s) is to have a disciplined approach for buying and selling. Business, economic and competitive conditions evolve over time. What may have once been a high-flying stock can go on to experience years of disappointing returns or even disappear. It is always better to buy and then monitor, to determine whether or not the stock still meets your investment criteria, than it is to buy and forget. Holding a stock for the remainder of your life may sound like a noble goal, but even low transaction investors like Warren Buffett periodically sell stocks from their portfolios.

The study had two other findings worth paying attention to. The first is the benefits of diversification. Bessembinder found that “rates of underperformance relative to benchmarks decline as more stocks are added to the portfolio,” after looking at portfolios ranging from one stock to 25 stocks in size. The second is the positive impact of companies returning capital to shareholders. General Motors Corp. ranked eighth in Bessembinder’s list of the top 10 wealth-creating stocks. He attributed this to the more than $64 billion the company paid to shareholders as well as its share buybacks prior to filing for bankruptcy in 2009.

Finally, for those of you who are curious, the stocks Bessembinder credits for creating largest amount of wealth are Exxon Mobil Corp. (XOM) ($1.002 trillion in shareholder wealth), Apple Inc. (AAPL) ($745.7 billion), Microsoft Corp. (MSFT) ($629.8 billion), General Electric Co. (GE) ($608.1 billion), International Business Machines (IBM) ($520.2 billion), Altria Group Inc. (MO) ($470.2 billion), Johnson & Johnson (JNJ) ($426.2 billion), General Motors ($425.3 billion), Chevron Corp. (CVX) ($390.4 billion) and Wal-Mart Stores Inc. (WMT) ($368.2 billion).

The Week Ahead 

We’ll see more earnings reports from the early third-quarter reporters. On the calendar are S&P 500 members Lennar Corp. (LEN) and Paychex Inc. (PAYX) on Tuesday; Acuity Brands Inc. (AYI), Monsanto Co. (MON) and PepsiCo Inc. (PEP) on Wednesday; and Constellation Brands Inc. (STZ) and Costco Wholesale Corp. (COST) on Thursday.

The week’s first economic reports will be the September Purchasing Managers’ Manufacturing Index (PMI), the ISM’s September manufacturing index and August construction spending. All three will be released on Monday. September motor vehicle sales will be released on Tuesday. Wednesday will feature the September ADP employment report and the September ISM non-manufacturing index. August international trade data and August factory orders will be released on Thursday. Ending the week, September jobs data—including the unemployment rate and the change in nonfarm payrolls—will be released on Friday. Keep the hurricanes in mind when reviewing economic data.

Eight Federal Reserve officials will make public appearances this week. Dallas president Robert Kaplan will speak on Monday. Federal Reserve chair Janet Yellen and St. Louis president James Bullard will speak on Wednesday. San Francisco president John Williams, Philadelphia president Patrick Harker and Kansas City president Esther George will speak on Thursday. Atlanta president Raphael Bostic, New York president William Dudley and Dallas president Robert Kaplan will speak on Friday.

About The Author - Charles Rotblut, CFA is the VP and Editor for American Association of Individual Investors (AAII). Charles is also the author of Better Good than Lucky. (EconMatters author archive here)