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It’s almost Election Day in the US once again. For those who need a brief civics refresher, every two years the full US House of Representatives and one-third of the Senate are up for reelection. Midterm elections are so-called because they come nearly two years into a president’s term.
While the outcomes of the elections are uncertain, one thing we can count on during this 2022 midterm election cycle is that plenty of opinions and prognostications will be floated in the days to come. In financial circles, this will almost assuredly include any potential for perceived impact on markets. But should we focus too much on midterm elections?
Of course, we always advise against making short-term changes to a long-term plan to try to profit or avoid losses from changes in the political winds. For context, it is helpful to think of markets as a powerful information-processing machine. The combined impact of millions of investors placing billions of dollars’ worth of trades each day results in market prices that incorporate the aggregate expectations of those investors. This makes outguessing market prices consistently very difficult.1 While surprises can and do happen in elections, the surprises don’t always lead to clear-cut outcomes for investors.
The 2016 presidential election serves as a recent example of this. There were a variety of opinions about how the election would impact markets, but many articles at the time posited that stocks would fall if Trump were elected.2 The day following President Trump’s win, however, the S&P 500 Index closed 1.1% higher. So even if an investor would have correctly predicted the election outcome (which was not apparent in pre-election polling), there is no guarantee that they would have predicted the correct directional move, especially given the narrative at the time.
But what about congressional elections? For the upcoming 2022 midterms, market strategists and news outlets are still likely to offer opinions on who will win and what impact it will have on markets. However, data for the stock market going back to 1926 shows that returns in months when midterm elections took place did not tend to be that different from returns in any other month.
Exhibit 1 shows the frequency of monthly returns (expressed in 1% increments) for the S&P 500 Index from January 1926–June 2022. Each horizontal dash represents one month, and each vertical bar shows the cumulative number of months for which returns were within a given 1% range (e.g., the tallest bar shows all months where returns were between 1% and 2%).
The blue and red horizontal lines represent months during which a midterm election was held, with red meaning Republicans won or maintained majorities in both chambers of Congress, and blue representing the same for Democrats. Striped boxes indicate mixed control, where one party controls the House of Representatives, and the other controls the Senate, while gray boxes represent non-election months.
This graphic illustrates that election month returns were well within the typical range of returns, regardless of which party won the election. Results similarly appeared random when looking at all Congressional elections (midterm and presidential) and for annual returns (both the year of the election and the year after).
While it can be easy to get distracted by month-to-month or even one-year returns, what really matters for long-term investors is how their wealth grows over longer periods of time. Exhibit 2 shows the hypothetical growth of wealth for an investor who put $1 in the S&P 500 Index in January 1926. Again, the chart lays out party control of Congress over time. And again, both parties have periods of significant growth and significant declines during their time of majority rule.
However, there does not appear to be a pattern of stronger returns when any specific party is in control of Congress, or when there is mixed control for that matter. Markets have historically continued to provide returns over the long run irrespective of (and perhaps for those who are tired of hearing political ads, even in spite of) which party is in power at any given time.
Equity markets help investors grow their assets, and we believe investing is a long-term endeavor. Trying to make investment decisions based on the outcome of elections is unlikely to result in reliable excess returns. At best, any positive outcome based on such a strategy will likely be the result of random luck. At worst, it can lead to costly mistakes. Accordingly, there is a strong case for investors to rely on patience and portfolio structure, rather than trying to outguess the market, to pursue investment returns.
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