The Rosh Hashanah Market Myth: Should You Sell Everything Before the High Holidays?

By Yogurt · 2026-09-11 · Market Analysis

For decades, a persistent myth has circulated in the financial world: sell your stocks before Rosh Hashanah and buy them back after Yom Kippur. But does this strategy actually hold water? We dive into 54 years of S&P 500 data to find out.

A well-worn piece of market folklore claims that investors should sell their entire portfolio before the Jewish New Year, Rosh Hashanah, and jump back in after the Day of Atonement, Yom Kippur. This "Sell in Rosh Hashanah, Buy in Yom Kippur" strategy is one of the most widely known adages in finance, but is it a profitable one or just a quirky myth?

The Origins of the Myth

The theory seems to have originated from an observable drop in trading volume between the two holidays. Historically, this was attributed to many Jewish traders and financiers being away from their desks for religious observance. This lower liquidity, the thinking goes, leads to higher volatility and a downward trend.

The idea gained significant traction after two major events coincided with this period: President Eisenhower's heart attack in September 1955, which caused a 6% drop in the Dow Jones, and the collapse of Lehman Brothers in 2008. These dramatic events cemented the holiday period's reputation as a bearish one.

54 Years of Data Tell a Different Story

To test the theory, we analyzed 54 years of S&P 500 data for the six-day trading window between Rosh Hashanah and Yom Kippur.

At first glance, the myth appears to have some merit.

  • Over the past 54 years, the S&P 500 has had more negative periods (31) than positive ones (23) during this specific window.
  • The average return for the period is a negative 0.4%.
This seems to suggest a slight, but consistent, downward bias. However, the devil is in the details.

The 2008 Anomaly

The data is heavily skewed by one catastrophic event: the 2008 financial crisis, which saw the Lehman Brothers bankruptcy unfold during this exact holiday window. That year, the market plummeted dramatically.

What happens if we treat 2008 as the outlier it was and remove it from the calculation?

Without 2008, the average return for the Rosh Hashanah-Yom Kippur period flips from -0.4% to slightly positive.

The entire myth, it turns out, hinges on one of the largest financial collapses in modern history. Since 2015, the performance has been a coin toss, with five positive years and five negative years, and the average return has actually been positive.

A Better Holiday Strategy?

While the Rosh Hashanah sale appears to be a bust, the data reveals a potentially more interesting seasonal trend: Buy on Yom Kippur and sell on Passover.

Analyzing this longer-term holiday strategy yields far more compelling results:

  • Average potential return: +6.4%
  • Positive years: 38
  • Negative years: 16
This strategy is significantly more statistically robust than the short-term Rosh Hashanah gimmick.

The Verdict

Basing your investment decisions on religious holidays or market folklore is rarely a sound strategy. While the "Sell in Rosh Hashanah" adage is a fun story rooted in a sliver of historical data, its predictive power dissolves under scrutiny. The market's direction this year will be driven by concrete economic data like the upcoming CPI and PPI reports and the Fed's interest rate decisions, not by ancient superstitions.

Instead of clearing out your portfolio, it's wiser to stay focused on the fundamentals. And if you are looking for a seasonal play, the data suggests waiting until after Yom Kippur might be the better bet.