We hear a lot about how stocks perform “on average”, and what to “expect” from stock returns:
“On average, stocks return x%.”
“You can expect stocks to return x% over the long run.”
“We expect stocks to return x% per year.”
But what to expect and what is average are two very different things. In fact, average happens so rarely, that I would almost never expect the average. Let’s take a look at some numbers.
Below is a chart of one-year rolling returns for the S&P 500 since 1936. Every spot on that line represents the prior 12 months of returns. As you can see, it is quite sporadic. The “average” return for this set of data is +11.9%, but it ranges from -50% to more than +61%!
Return data from Morningstar Direct
When it comes to investing, realistic expectations are very important.
They keep us grounded and help us keep emotions out of the decision-making process. Don’t expect average returns every time you look at your stocks. Statistically speaking, since two standard deviations capture ~95% of data, it is safe to say you can expect somewhere between two standard deviations on any given period. If you are looking at one-year returns, that would be between -23% and +47%.
It is also important to remember your time horizon. Expectations over one year should be very different than expectations over 30 years. For reference, the entire range of 30-year returns for the S&P 500 since 1936 is between +9.1% and +14.7%.
S&P 500 TR index, monthly returns, 3/31/1936 to 10/31/2019
Lastly, we need to remember that this is only one asset class. If you have a diversified strategy, there is a good chance that large U.S. companies only make up a small percentage of your strategy. International companies, small and mid-sized companies, various bonds, and alternative strategies all merit different expectations. As financial advisors, it is our job to help you understand what to expect. Not sure what to expect? Give us a call.
Nicholas Boguth is an Investment Research Associate at Center for Financial Planning, Inc.® He performs investment research and assists with the management of client portfolios.
Return data from Morningstar Direct. S&P 500 TR index, monthly returns, 3/31/1936 to 10/31/2019. Any opinions are those of Nicholas Boguth, Investment Research Associate, and not necessarily those of Raymond James. Expressions of opinion are as of this date and are subject to change without notice. There is no guarantee that these statements, opinions or forecasts provided herein will prove to be correct. Investing involves risk and you may incur a profit or loss regardless of strategy selected, including diversification and asset allocation. Keep in mind that individuals cannot invest directly in any index, and index performance does not include transaction costs or other fees, which will affect actual investment performance. Individual investor's results will vary. Past performance does not guarantee future results. Future investment performance cannot be guaranteed, investment yields will fluctuate with market conditions. The S&P 500 is an unmanaged index of 500 widely held stocks that is generally considered representative of the U.S. stock market. International investing involves special risks, including currency fluctuations, differing financial accounting standards, and possible political and economic volatility.