Do Presidents Play a Role in Equity Performance?

September 10, 2020

With market volatility already heightened due to the COVID-19 pandemic, the U.S. presidential election this year poses another layer of uncertainty that investors may view as added risk to their portfolios. In particular, there is inevitable speculation about how the market will react upon which candidate or political party wins the election. This week’s chart illustrates equity performance over the last nine presidents since 1969.

The question most asked is how the stock market will perform under Republican or Democratic leadership in the White House. Based on the data above,¹ the equity markets have averaged 14% annualized total returns when the president has been a Democrat and 8% when a Republican has been president. However, we caution that equity markets are subject to many market forces and most importantly, the sample size from this data set is not large enough to support these trends in a statistically significant manner. The good news is that regardless of political party, the stock market has averaged 10% a year over the time period shown in the chart.

As we look towards the November election, it is critical to understand the platforms of each candidate and how they can broadly impact the economy and by extension, equity markets. Understanding each candidate’s position on a variety of economic and social issues will inform the market’s likely reaction to the election results and help formulate expectations for investors. In the coming weeks, we will release a paper that examines these very topics in greater depth to establish baseline expectations of each candidate’s policies, market impact, and historical market performance of political party leadership in Washington across the White House, Senate, and House of Representatives. If nothing else, we know the election will be contentious and scrutinized, with market participants closely watching the ultimate result.

Print PDF > Do Presidents Play a Role in Equity Performance?

¹ For measuring equity performance, a total return index was used to account for shares that pay dividends and represent more accurate performance by reinvesting dividends back into the index.

 

The opinions expressed herein are those of Marquette Associates, Inc. (“Marquette”), and are subject to change without notice. This material is not financial advice or an offer to purchase or sell any product. Marquette reserves the right to modify its current investment strategies and techniques based on changing market dynamics or client needs.

The opinions expressed herein are those of Marquette Associates, Inc. (“Marquette”), and are subject to change without notice. This material is not financial advice or an offer to purchase or sell any product. Marquette reserves the right to modify its current investment strategies and techniques based on changing market dynamics or client needs.

Related Content

10.22.2026

Will Higher Rates Cramp the Markets?

Anyone who has run a marathon knows the last six miles are brutal — no matter how well the first…

Line chart comparing S&P 500 Index cumulative returns for midterm and non-midterm election years since 1980. The x-axis shows October through December, and the y-axis shows S&P 500 Index cumulative return, ranging from -1% to 8%. For full dataset, please contact marquettemarketing@marquetteassociates.com.

10.19.2026

Divided We Rise?

Since 1980, the S&P 500 Index has generally performed well in the weeks surrounding U.S. midterm elections. Specifically, the index…

Chart #1 - Line chart showing PJM summer peak load estimates in gigawatts (GW) from 2015 to 2045. The chart compares historical peak load, current capacity, and forecasts from 2024, 2025, and 2026, showing projected demand rising above current capacity over time. Chart #2 - Stacked bar chart showing U.S. power demand in terawatt-hours (TWh) for 2025 and estimated demand in 2030. The chart compares data center and non-data center demand, showing total power demand increasing over the period.

10.12.2026

The Power Demand Supercycle

This week’s chart highlights the accelerating growth of electricity demand in the U.S., which has been driven primarily by the…

10.08.2026

3Q 2026 Market Insights Webinar

LIVE WEBINAR — OCTOBER 22 Please join Marquette’s research team for our 3Q 2026 Market Insights Webinar…

Bar chart showing average monthly VIX levels from 1990 through October 2026. The x-axis displays months of the year from January through December, and the y-axis displays VIX level. October has the highest average VIX level among all months, while April has the lowest. The chart also includes a current VIX level and a long-term average VIX level for comparison. Source: Bloomberg as of October 2, 2026. Data series begins in 1990. For full dataset, please contact marquettemarketing@marquetteassociates.com.

10.05.2026

Spooky Season

For investors, the spookiest thing about October might not be the ghosts and monsters that are bound to show up…

Line chart showing 10-year U.S. Treasury rate, 5-year/5-year breakeven inflation rate, and 10-year real yield from December 2025 through September 2026. The left axis shows rates from 3.6% to 5.4%, and the right axis from 1.6% to 3.0%. The Treasury rate and real yield rise notably in late 2026, while the breakeven inflation rate remains relatively range-bound around 2.3%–2.4%. For full dataset, please contact marquettemarketing@marquetteassociates.com.

09.28.2026

Getting Real on Inflation

The phrase “expectations of higher inflation” has become a staple in financial news to explain the increase in nominal U.S….

More articles

Subscribe to Research Email Alerts

Research Email Alert Subscription

Research alerts keep you updated on our latest research publications. Simply enter your contact information, choose the research alerts you would like to receive and click Subscribe. Alerts will be sent as research is published.

We respect your privacy. We will never share or sell your information.

Thank You

We appreciate your interest in Marquette Associates.

If you have questions or need further information, please contact us directly and we will respond to your inquiry within 24 hours.

Contact Us >