Is the Market Ready to Go Back to School?

There is something unique about the back-to-school season. As students head back to the classroom, families transition out of relaxed summer schedules and back into regular routines. Even though the calendar year is far from over, late August always carries the distinct feeling of a fresh start—a “new year” reset.

Interestingly enough, the stock market can reflect this exact rhythm. During the warm summer months, market activity can feel like it takes a break of its own, giving rise to one of Wall Street’s oldest and most persistent adages: “Sell in May and go away.”

The Origins of “Sell in May”

The full traditional phrase actually dates back centuries to English financial history: “Sell in May and go away, and come on back on St. Leger’s Day.” (St. Leger’s Day referred to a famous horse race held in England every mid-September, marking the traditional end of summer for high-society traders who left London for vacation).

In modern market terms, the adage suggests that investors are better off stepping out of equities from May 1 through October 31, assuming that summer trading produces flat or sluggish returns compared to the winter months.

Why It “Feels” Right (and Why It’s Easily Debunked)

In years like this one, it is easy to see why the old saying continues to circulate. Looking at the S&P 500 from the end of May through July 31, the market followed the schoolyear and essentially “took the summer off.” Index returns chopped around sideways in a tight, muted range for two straight months, giving the impression that staying invested through the summer was a waste of time.

While a sideways market might make the “Sell in May” slogan feel intuitive, treating it as an actual investment strategy is easily debunked:

• Market-Timing Friction: Liquidating equity positions every spring to go to cash triggers capital gains taxes and trading costs that quickly erode long-term wealth.
• Arbitrage Patterns Dissipated: While the research papers had at one time proven this market trend true, examining even the last 15 years we can see that the anomaly has been eradicated, whether by a more knowledgeable market or simply a deterrence from happenstance.
• The Risk of Missing the Turn: Staying on the sidelines based on a date means risking missing sudden, sharp rallies that often occur without warning.

How Summer Consolidation Paved the Way for August

Rather than signaling market weakness, we actually view the flat period from late May through July as a healthy consolidation. After a strong start to the year, a two-month pause allowed the market to digest earlier gains, absorb shifting economic reports, and let corporate valuations settle without suffering major pullbacks.

Far from being a reason to “go away,” that quiet summer consolidation built the necessary structural foundation for the strong rally at the beginning of August.

By letting the market digest data beneath the surface, fundamentals took over from summer lull dynamics. As corporate earnings reports rolled in and economic stability was reconfirmed, the market found its footing to start August on solid ground—paving a bright, fundamental runway as we transition into autumn.