The “Sell in May and Go Away” Strategy in the IDX: Myth or Fact?
- 5 days ago
- 3 min read
If you actively invest in the stock market, you have definitely heard the famous Wall Street adage: “Sell in May and Go Away”. As May arrives, the annual investing dilemma resurfaces: Is it time to liquidate your stock portfolio, or is it actually the perfect time to accumulate shares and buy the dip? Does this seasonal phenomenon actually apply to the Jakarta Composite Index (JKSE), aka Indeks Harga Saham Gabungan (IHSG)?
Let’s debunk this stock market myth using hard historical data.
The Origins of “Sell in May and Go Away”
Historically, “Sell in May and Go Away” is a stock market strategy originating from the United States. US investors historically sold their equity holdings in May to prepare for their long summer holidays.
This mass sell-off often caused the stock index to experience a downtrend or severe consolidation until October. The stock market typically only returned to a bullish uptrend between November and April.
However, let's look at the local context: Indonesia does not have a traditional summer holiday season like the US. Despite this, the psychological sentiment of “Sell in May and Go Away” still heavily influences local investors, sometimes triggering unnecessary market panic.
The Reality of the IDX: Defying the Wall Street Myth
If we look at the data objectively, this investing myth shouldn't be blindly followed in the Indonesian stock exchange. According to historical data and market research, the “Sell in May and Go Away” period does not consistently result in a downtrend for the IHSG.
From the data above, we could see that over the last 20 years (2005 - 2024), the IHSG's performance during the May to October period is actually dominated by positive results. The market recorded 13 green years and only 7 red years.
It is true that the majority of foreign investors might sell their shares during this period (triggering foreign net sells). However, that alone does not automatically cause the IHSG to plummet. Stock market movements are driven by macroeconomic factors that are far more significant than the calendar month, such as:
global economic conditions and geopolitical tensions;
domestic monetary policies, particularly Bank Indonesia’s (BI) interest rates; and
fundamental corporate earnings and industrial sector performances.
Why Does May Still Feel “Heavy” in the Stock Market?
Even though the 20-year data is positive, the market from May through July often feels slow, sideways, and full of consolidation. There are two main reasons for this:
The Post-Dividend Hangover: May marks the tail end of the heavy dividend-distribution season. Once the cum-dates for major blue-chip stocks pass, it is normal to see a "dividend trap" where market momentum cools down and trading volumes shrink.
The Sentiment Vacuum: June and July are notoriously "quiet months" in the market. Investors tend to hold back their capital as they wait for the Q2 (Semester 1) corporate earnings reports, which typically aren't released until late July.
Investment Strategy for May
Instead of panic selling and realizing unnecessary losses, apply these tactical steps to protect and grow your portfolio:
Strengthen Fundamental Analysis: Do not sell your stocks just because the calendar says it’s May. Base your trading decisions on solid corporate fundamentals and intrinsic valuations.
Monitor the Macroeconomic Landscape: Keep a close eye on political news, economic updates, and global events that directly influence current market trends.
Focus on a Long-Term Strategy: Maintain the discipline to hold onto high-quality assets in your portfolio. Do not let short-term seasonal volatility shake your investment plan.
Diversify Your Portfolio: Reduce the risk of seasonal market fluctuations by spreading your investments across different sectors, such as defensive consumer staples or healthcare.
Conclusion
The “Sell in May and Go Away” phenomenon in Indonesia is more of a psychological hurdle than a statistical certainty. With a 20-year track record of positive average movements from May to October, the IHSG has proven its strong resilience.
So, will you Sell in May and Go Away, or will you stand your ground? Whatever your strategy is, don't let seasonal myths disrupt your journey.
Disclaimer: This content is created for educational purposes or service promotion, and does not constitute a recommendation to buy or sell any specific Securities. Any risks arising from investment decisions made based on the information in this publication are the sole responsibility of the respective audience. PT KAF Sekuritas Indonesia is licensed and supervised by the Financial Services Authority (Otoritas Jasa Keuangan / OJK).
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