Sell in May and go away? Historic volatility is crushing investors’ favorite seasonal indicators.

by Chief Editor

The Shifting Dynamics of Market Seasonality

The old investment adage “sell in May and go away” may need reevaluation this year, as current economic factors such as trade wars, tax policies, and debt ceiling negotiations disrupt traditional seasonal trading patterns. According to Business Insider, May tends to outperform in postelection years, but the market’s volatility makes future predictions challenging.

Understanding Market Unpredictability

Whenever the market environment undergoes significant changes, such as during the ongoing trade war and shifts in tax policy, traditional seasonality norms struggle to remain relevant. Market strategists note that policy outcomes, ranging from trade deals to tax legislation, have a greater influence on returns than seasonal patterns might suggest.

For instance, the traditional December “Santa Claus rally” failed to materialize at the start of 2025. Similarly, April witnessed the S&P 500 decline by 1.1% due to increased volatility stemming from tariff escalations.

Revisiting ‘Sell in May’

The proverb “sell in May and go away” traces back to 1776, advising investors to expect slower market performance during summer months. Historically, the May to October period sees a mild gain of about 1.8%. However, this year forecasts are uncertain amid trade tensions and possible recession risk.

Despite these challenges, certain positive factors may impact the May to October period, such as potential trade deals and pro-growth policies expected to gain focus later in the year.

Pro Tips for Investors

Did you know? Recent trends suggest stocks might perform better in the six months between May and October than traditionally expected, with a 10-year return of 4.6%.
Pro tip: Monitoring ultra-bullish market signals like the Zweig Breadth Thrust could offer clues on navigating expected seasonal stagnation.

Future Outlook: Beyond Traditional Seasonal Wisdom

Recent years indicate rising success for “buying in May,” particularly in postelection years, with the S&P 500 showing an average increase of 1.6%. Even amid uncertainties, certain market analysts suggest selling into rallies may remain a prudent strategy this year, given unknowns like future trade deals and economic growth risks.

Frequently Asked Questions

Will ‘sell in May and go away’ apply in 2025?

While market unpredictability and external economic factors play significant roles, current data shows a possibility of positive returns in May to October, suggesting a mixed outlook for the adage’s applicability in 2025.

How should investors adjust their strategies amid policy uncertainty?

Investors should prioritize diversification and consider staying agile to policy shifts. Monitoring reliable economic signals like the Zweig Breadth Thrust can provide deeper insights into market conditions.

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