Government shutdown: What could investors expect from the market?

Originally Posted September 25, 2025 – Government shutdown: What could investors expect from the market?

Key takeaways

Sept. 30 deadline

If Congress doesn’t pass a spending bill or continuing resolution by Sept. 30 at midnight, parts of the government will start to shut down.

Limited market impact?

Many past shutdowns (but not all) led to market volatility, which tended to resolve quickly with limited to no impact.

Think long-term

Don’t let any short-term market volatility from a government shutdown change your long-term investing plan.

The US government’s fifth shutdown of the century is drawing near. If Congress doesn’t pass legislation to fund the government by Sept. 30, 2025, large parts of the federal government will stop operating. What is a government shutdown, and is one imminent? How could a government shutdown affect the stock market? Should investors be concerned?

Shutdowns limit government operations

During a shutdown, essential government functions would continue to operate. This includes, but isn’t limited to, air-traffic control, border patrol, federal prisons, power grid, mail delivery, disaster relief, food-safety inspections, military, and tax collection. Seniors will continue to receive Social Security and Medicare. Veteran benefits, unemployment benefits, and food stamps will still be administered.

Non-essential government activities would cease though. Examples abound, but here are just a few. The Justice Department would suspend civil cases. NASA would pause most projects but continue to support to the International Space Station. National Zoos and Parks would close, though zoo animals will be fed.

A shutdown is no laughing matter for the estimated 3 million federal employees. Non-essential workers would be furloughed. Essential workers will be paid retroactively when Congress funds the government again. In 2019, roughly 800,000 non-essential workers were furloughed, and 1.3 million essential workers received IOUs.

Government shutdowns tend to resolve quickly

Government shutdowns have precedent. Should it happen, this would be the 22^nd since modern Congressional budgeting began in 1976. The longest — 34 days — lasted from December 2018 to January 2019, during the first Trump administration.¹ Most were resolved much more quickly, with an average length of eight days. Five only lasted a day.

Shutdowns typically end when one or both political parties can no longer withstand the public’s ire. During the 2013 government shutdown, Congress’s approval rating fell to a record-low 9%.² For context, at the time, that was below approval ratings for head lice, root canals, traffic jams, and even colonoscopies. Currently, 26% of Americans approve Congress, down from a multi-year high of 36% in March 2021.³

Government shutdowns have had minimal impact on the stock market

The good news is that government shutdowns haven’t really affected the stock market historically. While there have been examples of heightened market volatility, it’s generally been benign. The S&P 500 Index posted positive returns during 12 of the 21 government shutdowns. The average S&P 500 return during shutdowns has been 0.1%.⁴ (Remember, shutdowns have been resolved, on average, within eight days.)

In the 12 months following the December 2018 government shutdown — the most recent — the S&P 500 Index gained 26.2%. It returned 19.72% in the year following the infamous shutdown of 2013. In fact, since 1980, the average S&P 500 return in the 12 months following the government closing is 16.95%.⁵

Extending the timeline even further, a $100,000 investment in the S&P 500 Index in 1957 would’ve been worth $12.6 million by the end of 2024.⁶ That’s despite 21 government shutdowns.

Investors should consider sticking to long-term investing plans

While unnerving, concerns about shutdowns shouldn’t change investors’ long-term investment plans; sticking to the plan may be the best way forward. This wouldn’t be the first government shutdown, and it likely won’t be the last. Ultimately, we expect the spending bill (or bills) to pass without incident and a shutdown to be averted or short-lasting.

In the meantime, the deadline is approaching, and the political gamesmanship is ramping up. Past shutdowns have generally been short with little noticeable impact for most people. Let’s hope history repeats itself. 

• 1 Source: US Treasury, 8/31/23
• 2 Source: Gallup, 2/26/25. The Congressional Approval Rating fell to 5% in the Associated Press poll.  It never got below 9% in the Gallup poll.
• 3 Source: Gallup, 9/16/25
• 4 Source: Bloomberg, L.P. 12/31/22. An investment cannot be made into an index. Past performance does not guarantee future results.
• 5 Source: Bloomberg L.P., 2/26/25, based on the returns of the S&P 500 Index. An investment cannot be made into an index. Past performance does not guarantee future results.
• 6 Source: Bloomberg L.P., 12/19/24. The S&P 500 Index is a market-capitalization-weighted index of the 500 largest domestic US stocks. Performance based on price returns. An investment cannot be made into an index. Past performance does not guarantee future results.