“Sell in May and Go Away” is Dead

By Michael Ruger, CFP®
Partner and Chief Investment Officer at Greenbush Financial Group

One of the most well-known Wall Street adages is the “Sell in May and go away” strategy. The idea is simple: sell your stock holdings in May, avoid the typically slower summer months, and then re-enter the market in the fall when trading activity and returns supposedly pick back up. On the surface, this strategy sounds appealing—who wouldn’t want to avoid risk and still capture the best gains of the year?

But here’s the problem: if you had followed this strategy over the past six years, you would have missed out on some very strong returns. In fact, staying on the sidelines from June through August would have cost you real money.

In this article, we’ll cover:

• A look at the actual S&P 500 returns from June–August over the past few years

• Why investors would have been “right” only 1 out of 6 times

• The real risk of following catchy headlines instead of hard data.

• Why discipline through volatility has historically paid off.

What the Data Really Says

Below is a breakdown of the S&P 500 Index returns from June through August for each year since 2020.

When we look at the data:

• Five out of six years, the June – August months produced positive returns.

• The average return over this period was 6.91%.

• Investors would have only been correct in sitting out one year (2022), when the S&P fell by –3.37%.

Put simply, investors who followed the Sell In May and Go Away strategy for the past 6 years cost themselves about 7% PER YEAR in investment returns. 

Why the Temptation is Strong

It’s easy to see how investors get drawn into these types of strategies. A headline or article points out that summer months are historically weaker, or that volatility spikes during this period. On paper, it can sound logical: avoid risk, re-enter later, and come out ahead.

But as the table shows, the reality doesn’t line up with the theory. By relying on the “Sell in May” strategy, investors risk leaving money on the table. That’s the danger of market timing—you need to be right not once, but twice (when to sell, and when to buy back in).

Volatility vs. Discipline

There’s no denying that the summer months often bring more volatility to the stock market. Thinner trading volumes and seasonal economic patterns can cause choppier price action. But investors who have had the discipline to ride through those bumps have been rewarded.

The past six years make this clear: while the S&P 500 had its ups and downs from June to August, the overall trend was solidly positive. That’s why sticking to a long-term investment plan often beats trying to time the market.

About Michael……...

Hi, I’m Michael Ruger. I’m the managing partner of Greenbush Financial Group and the creator of the nationally recognized Money Smart Board blog . I created the blog because there are a lot of events in life that require important financial decisions. The goal is to help our readers avoid big financial missteps, discover financial solutions that they were not aware of, and to optimize their financial future.

Frequently Asked Questions (FAQs)

What does “Sell in May and go away” mean in investing?
“Sell in May and go away” is a market adage suggesting that investors should sell their stock holdings in May, avoid the summer months when returns are thought to be weaker, and reinvest in the fall. The strategy is based on historical seasonal trends but often oversimplifies how markets actually perform.

Has the “Sell in May” strategy worked in recent years?
Recent data shows that this strategy has largely underperformed. Over the past several years, the S&P 500 has delivered positive returns during the summer months more often than not, meaning investors who exited in May would have missed out on gains.

Why can following seasonal market sayings be risky?
Relying on old adages or headlines instead of data can lead to missed opportunities or poorly timed decisions. Markets are influenced by a range of factors—economic trends, interest rates, and company performance—not just the calendar.

What’s the downside of sitting out of the market during the summer?
Missing even a few strong market days can significantly reduce long-term investment returns. Staying invested allows you to participate in rebounds and compounding growth that can happen unexpectedly throughout the year.

Why is discipline so important for investors?
A disciplined, long-term investment approach helps smooth out volatility and avoid emotional decision-making. Sticking with a consistent strategy based on goals and time horizon has historically produced better outcomes than trying to time the market.

What’s a more effective alternative to timing seasonal trends?
Instead of trying to predict short-term market movements, investors can focus on maintaining a diversified portfolio aligned with their risk tolerance and financial objectives. This approach emphasizes consistency and adaptability rather than reacting to temporary patterns.