How the stock market typically performs during the summer

Historically, the S&P 500 has shown positive median performance (3.7%) during the summer months (Memorial Day to Labor Day) 72% of the time, according to Bespoke Investment Group. However, gains are more pronounced when the S&P 500 is already up year-to-date entering the period, which was not the case this year before Memorial Day, suggesting potentially more challenging summer months for stocks; JPMorgan anticipates the S&P 500 to remain rangebound due to trade uncertainties, while Canaccord Genuity remains neutral, foreseeing potential risk factor dissipation later in the summer.

Analysis

Historical data from Bespoke Investment Group indicates the S&P 500 has typically achieved a median gain of 3.7% during the summer months (Friday before Memorial Day to Friday before Labor Day) over the past 50 years, with positive returns 72% of the time. This performance is notably stronger, with a median gain of 4.3% and positive returns 74% of the time, when the index is already higher year-to-date (YTD) entering this period. Conversely, when the S&P 500 was lower YTD, as it was on May 23rd before this year's Memorial Day weekend, the median gain historically dropped to 1.4% with positive returns only 67% of the time, suggesting potentially more challenging conditions for equities this summer. This cautious outlook is supported by JPMorgan's Fabio Bassi, who anticipates the S&P 500 could "remain rangebound, with limited short-term upside" due to unresolved trade uncertainties ahead of a July tariff deadline. While Canaccord Genuity's Michael Graham maintains a neutral short-term view, he sees "a pathway toward many of these risk factors dissipating later in the summer," provided significant tariff volatility is avoided. The S&P 500's slight move into positive YTD territory on the Tuesday following Memorial Day introduces a slight ambiguity, but the pre-period positioning and prevailing uncertainties, especially regarding trade, remain key considerations for the summer outlook.

Key Decisions for Investors

• Investors should moderate expectations for broad market gains during the summer months, given the S&P 500's negative year-to-date performance leading into the Memorial Day period, which historically correlates with weaker summer returns.
• Monitor developments around U.S. trade policy closely, particularly leading up to the July tariff deadline, as this is cited as a key factor influencing market direction and potentially capping upside.
• Consider a neutral to cautiously optimistic stance, remaining alert for signs of risk factor dissipation later in the summer, such as greater clarity on trade or the U.S. deficit, which could provide a catalyst for market improvement.