Roots: born in Sweden — lived also in Switzerland, USA, UK — mixed up genes from Sweden, Norway, India, Germany
Languages: French, English, Swedish, German, Portuguese, Latin, Ada, Perl, Java, assembly languages, Pascal, C/C++, etc.
Roles: entrepreneur, programme manager, methodology lead, quality and risk manager, writer, director of technology, project lead, solutions architect — as well as gardener, factory worker, farmhand, supermarket cleaner, programmer, student, teacher, language lawyer, traveller, soldier, lecturer, software engineer, philosopher, consultant
2003-May-06
Historical average stock market return
Professor Roger G. Ibbotson (Practice of Finance, Yale School of Management) is a frequently cited source on historical stock market returns, e.g.:
The compound average annual nominal rate of return (including inflation) for common stocks was 10.7 percent over the period 1926-2001. This return exceeded long-term U.S. Treasury yields by over 5 percent per year.
[Note: this refers to returns on the S&P 500 Index in nominal terms --not in real (inflation-adjusted) terms.]
The following paper has a detailed treatment of equity returns and causal factors -- Stock Market Returns in the Long Run: Participating in the Real Economy (Ibbotson and Chen, 2002):
We decompose the 1926-2000 historical equity returns into supply factors including inflation, earnings, dividends, price to earnings ratio, dividend payout ratio, book value, return on equity, and GDP per capita. ...
The historical equity return and earnings data used in this study are obtained from Wilson and Jones (2002) [Wilson, Jack W. and Charles P. Jones. An Analysis of the S&P 500 Index and Cowles' Extensions: Price Indexes and Stock Returns, 1870-1999, Journal of Business 75-3, July 2002.]. The average compounded annual return for stock market over the period 1926-2000 is 10.70%. The arithmetic annual average return is 12.56% and the standard deviation is 19.67%.
Note that Business Week (2002-Apr-15) mentions an average real annual 7% return--i.e. adjusted for inflation--but without citing source or reference:
Since 1982, the total inflation-adjusted return on stocks (including dividends and capital gains) has been about 12% annually. Historically, the real annual return on common stocks has averaged 7%. Since stock prices are set both by profits and by expectations of what other investors will pay for stocks, annual returns can exceed the 7% norm for years and even decades--but not indefinitely. Yale University economist Robert J. Shiller has called this a "naturally occurring Ponzi process." As Shiller has noted, stock prices also can underperform the economy for long periods. Between January, 1966, and January, 1986, annual total returns to stockholders averaged just 1.9%.
There's more from Business Week (2000-Sep-08):
a review of the economic literature related to long-term returns seems to suggest that a nominal 9% to 12% return is a reasonable assumption, or a 6% to 9% return after taking inflation into account. ... [Ibbotson] forecasts a nominal median return of 11.6% for large-capitalization stocks between 1999 and 2025 [and 12.5% for small-cap stocks]. (His inflation forecast over that same time period is 3.1%.)
Of course, such analysis will not predict the stock market return this year or next, but it does give us an educated guess of what trend to expect. The stock market tends to reflect the average rate of profit. If it spends much time above or below that average, we know with certainty that, in a frame of 10-30 years, there must and will be a correction in the opposite direction. Note that I refer to the real rate of profit, which can be difficult to measure, most notably in periods of inflation caused by government intervention.
Some high-level number-crunching for the NASDAQ composite (with comparatively low dividends overall, so we ignore those in the returns): 1971 at 111, 1981 at 212 (about 8% annual return), 1991 at 491 (almost 8%), 1997 at 1441 (over 10%), 2000 at 3817 (13%), and 2003 at 1509 (down to 8.5% return since 1971). [All values rounded on May-06 except 2000-May-05] If the Nasdaq had grown at a regular, compounded 10.7% from its all-time low close of 55 in October 1974, it would be at a mere 1005 today. Hmmm. Also, a Motley Fool article (dated 2000-Nov-27) had an interesting examination of where the Nasdaq would have been at the time, had it steadily returned 12% from various "magical" levels.
See also:
Hybrid cars are not economical (2002-Nov-26)
Inert venture capital (2002-Nov-15)
Penny Black, 1840-May-06
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