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Categories
Election
Can midterm elections move markets? 5 charts to watch
Matt Miller
Political Economist
Chris Buchbinder
Equity Portfolio Manager

With more than nine months to go, midterm elections are already top of mind for politicians and voters alike. And with good reason. Capital Group political economist Matt Miller believes 2022 could be one of the more consequential midterm elections in U.S. history.


“Make no mistake, every move in Washington right now is being carefully calculated with the midterms in mind,” Miller says.


But while control of Congress may be at stake, do midterm elections have any effect on equity markets?


To find out, we examined more than 90 years of data and found that the answer is yes, markets have behaved differently during midterm election years. Here are the five key lessons you need to know about investing in this political cycle.


1. The president’s party typically loses seats in Congress


The chart shows the net change in House of Representative seats controlled by the president’s party after each midterm election since 1934. In 19 of the 22 elections, the president’s party lost seats. The only years it gained were 1934, 1998 and 2002.

Source: The American Presidency Project, "Seats in Congress Gained/Lost by the President's Party in Mid-Term Elections.”

Midterm elections occur at the midpoint of a four-year presidential term and usually result in the president’s party losing ground in Congress. Over the past 22 midterm elections, the president's party has lost an average 28 seats in the House of Representatives and four in the Senate. Only twice has the president’s party gained seats in both chambers.


“While the election is still nearly a year away — and that’s a lifetime in politics — history suggests we will see a backlash against the party in power that will result in Republicans taking back control of the House and potentially the Senate,” Miller says.


Why is this usually the case? First, supporters of the party not in power usually are more motivated to boost voter turnout. Also, the president’s approval rating typically dips during the first two years in office, which can influence swing voters and frustrated constituents to seek change.


Since losing seats is so common, it’s usually priced into the markets early in the year. But the extent of a political power shift — and the resulting policy impacts — remain uncertain until later in the year, which can explain some of the other trends we’ve uncovered.


2. Market returns tend to be muted until later in midterm years


In midterm election years, the points on the line generally stay within a range of 0% and 2% until around October, when they start to rise. In all other years, the points on the line increase steadily through most of the year.

Sources: Capital Group, RIMES, Standard & Poor’s. The chart shows the average trajectory of equity returns throughout midterm election years compared to non-midterm election years. Each point on the lines represents the average year-to-date return as of that particular month and day and is calculated using daily price returns from 1/1/31–12/31/21.

Our analysis of returns for the Standard & Poor’s 500 Composite Index since 1931 revealed that the path of stocks throughout midterm election years differs noticeably compared to all other years.


Since markets typically rise over long periods of time, the average stock movement during an average year should also steadily increase. But what we found was that in the first several months of years with a midterm election, stocks tend to have lower average returns and often gain little ground until shortly before the election.


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Markets don’t like uncertainty, and that adage seems to apply here. Earlier in the year there is less certainty about the election’s outcome and impact. But markets tend to rally when results are easier to predict in the weeks before an election, and they continue to rise after the polls close.


Knowing that markets may be choppy in 2022 can be helpful, but investors shouldn’t consider this a reason to sit on the sidelines or try to time the market. The path of stocks varies greatly each election cycle, and the overall long-term trend of markets has been positive.


3. Midterm election years have had higher volatility


The chart shows median volatility for the S&P 500 Index for each month since 1970 during midterm election years and for all other years. Midterm election years had higher volatility than non-election years in most months. Most notably, volatility spiked in the months leading up to midterm elections, including August through October.

Sources: Capital Group, RIMES, Standard & Poor's. As of 12/31/21. Volatility is calculated using the standard deviation of daily returns for each individual month. Standard deviation is a measure of how returns over time have varied from the average. A lower number signifies lower volatility. Median volatility for each month is displayed on an annualized basis.

Elections can be tough on the nerves. Candidates often draw attention to the country’s problems, and campaigns regularly amplify negative messages. Policy proposals remain uncertain but often target specific industries or companies.


So it may not be surprising that market volatility is higher in midterm election years, especially in the months leading up to Election Day. Since 1970, midterm years have had a median standard deviation of returns of nearly 16%, compared with 13% in all other years.


“I don’t think this year will be any different,” says equity portfolio manager Chris Buchbinder. “There may be a few bumps in the road, and investors should brace for short-term volatility, but I don’t expect the election results to be a huge driver of investment outcomes one way or the other.”


4. Market returns after midterm elections have been strong


The chart shows the S&P 500 Index price return one year after each midterm election since 1950. The returns were positive in every period and ranged from 1% to 33%. The average for all periods was 15.1%. By comparison, the average return for the same period after non-election years was 7.1%.

Sources: Capital Group, RIMES, Standard & Poor's. Calculations use Election Day as the starting date in all election years and November 5th as a proxy for the starting date in other years. Only midterm election years are shown in the chart. As of 12/31/21.

The silver lining for investors is that after such bouts of volatility, markets tend to rebound strongly in subsequent months. And the rally that often starts shortly before Election Day isn’t just a short-term blip. Above-average returns are typical for the full year following the election cycle. Since 1950, the average one-year return following a midterm election is 15%. That’s more than twice the return of all other years during a similar period.


5. Stocks have done well regardless of the makeup of Washington


The image shows the average annual total return for the S&P 500 Index from 1933 to December 31, 2021, under a unified U.S. government (10.4%), a unified Congress with the president in another party (7.4%) and a split Congress (10.8%).

Sources: Capital Group, Strategas. As of December 31, 2021. Unified government indicates control of the White House, House and Senate by the same political party. Unified Congress indicates control of the House and Senate by the same party, but control of the White House by a different party. Split Congress indicates control of the House and Senate by different parties, regardless of White House control.

There’s nothing wrong with wanting your preferred candidate to win, but investors can run into trouble when they place too much importance on election results. That’s because, historically, elections have had very little impact on long-term investment returns.


In 2020, many investors feared the “blue wave” scenario, or Democratic sweep. But despite these concerns, the S&P 500 Index has risen 38% following the 2020 election (from November 4, 2020, through January 18, 2022).


Going back to 1933, markets have averaged double-digit returns in all years that a single party controlled the White House and both chambers of Congress. This is just below the average gains in years with a split Congress, a scenario which many believe is a strong possibility in 2022. Even the “least good” outcome — when the president’s opposing party controls Congress — notched a solid 7.4% average price return.


What’s the bottom line for investors?


Midterm elections — and politics as a whole — generate a lot of noise and uncertainty. While midterm election years have exhibited these five trends in aggregate over long periods, it is important to remember that each year is different and follows its own path.


There is a good chance of higher volatility in 2022, but no need to fear it. The reality is that long-term equity returns come from the value of individual companies over time. Smart investors would be wise to look past the short-term highs and lows and maintain a long-term focus.



Matt Miller is a political economist at Capital Group. He has 33 years of industry experience and has been with Capital since 2014. He has a law degree from Columbia and a bachelor's from Brown.

Chris Buchbinder is an equity portfolio manager with 26 years of investment experience (as of 12/31/2021). He holds bachelor's degrees in economics and international relations from Brown. 


Standard & Poor‘s 500 Composite Index is a market capitalization-weighted index based on the results of approximately 500 widely held common stocks. The market index is unmanaged and, therefore, has no expenses. Investors cannot invest directly in an index.


Standard & Poor’s 500 Composite Index (“Index”) is a product of S&P Dow Jones Indices LLC and/or its affiliates and has been licensed for use by Capital Group. Copyright © 2022 S&P Dow Jones Indices LLC, a division of S&P Global, and/or its affiliates. All rights reserved. Redistribution or reproduction in whole or in part is prohibited without written permission of S&P Dow Jones Indices LLC.

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