May’s Market Meltdown: Why the IHSG and Rupiah Are Facing Their Worst Performance in Decades

The Indonesian financial market found itself in a sea of red this past Tuesday, as both the stock market and the national currency took a significant hit. For investors watching the screens, it was a sobering reminder of the volatility currently gripping the domestic economy. The Jakarta Composite Index (IHSG) and the Rupiah are not just experiencing a minor correction; they are navigating one of the most turbulent periods in recent history.

A Brutal Session for the IHSG

On Tuesday, May 26, 2026, the IHSG plummeted by 76.16 points, or approximately 1.23%, closing at the 6,130.19 level. This decline effectively wiped out the modest gains seen just a day prior. The scale of the sell-off was evident in the trading data: a massive transaction value of Rp 18.1 trillion was recorded, involving over 24 billion shares.

Market breadth was overwhelmingly negative, with 447 stocks declining compared to only 241 gainers. Foreign investors were seen exiting the market in droves, recording a net sell of Rp 1.6 trillion. The pressure was felt most acutely in the consumer primary, property, and financial sectors. Heavyweight blue-chip stocks acted as the primary anchors dragging the index down, with Astra International (ASII) contributing 18.95 points to the decline, followed by Bank Rakyat Indonesia (BBRI) at 15.68 points and Bank Central Asia (BBCA) at 11.71 points.

The Rupiah Under Siege

The story in the currency market was equally grim. The Rupiah ended the day at Rp 17,775 per US Dollar, marking a 0.25% depreciation. This marked the fourth consecutive day of losses, bringing the total decline for the week to 1%. However, the situation looks even more precarious in the non-deliverable forward (NDF) market, where the exchange rate has already breached the psychological barrier of Rp 18,000. For one-year tenors, the NDF rate has surged to the Rp 18,228–Rp 18,245 range, signaling deep-seated market anxiety about the currency's future stability. Meanwhile, the bond market reflected this stress, with the 10-year State Sovereign Bond (SBN) yield rising to 6.709%.

The Wall Street Divergence

Interestingly, while Indonesia struggled, Wall Street was celebrating. US markets closed at record highs, fueled by an AI-driven tech rally and optimism over geopolitical developments. The S&P 500 rose 0.58%, while the Nasdaq Composite jumped nearly 1%. The star of the show was Snowflake, which saw its stock price skyrocket by 36.5%—its largest single-day gain ever—after posting strong earnings forecasts. This optimism spilled over into the semiconductor space, lifting names like Qualcomm and AMD.

Adding to the global positive sentiment was a report from Axios suggesting that US and Iranian negotiators had reached a 60-day memorandum to extend a ceasefire. While US President Donald Trump has yet to give final approval, the prospect of easing tensions in the Middle East led to a slight dip in oil prices, with Brent crude falling to US$93.71 per barrel.

Historical Shadows and the May Curse

For the IHSG, May 2026 has been nothing short of a catastrophe. The index has dropped 11.8% this month alone, making it the worst May performance since the year 2000. Even more concerning is the year-to-date trend: the IHSG has fallen 29% so far in 2026, ranking it as the worst-performing major index in the world. The Rupiah isn't faring much better, with a 2.7% drop in May—its worst monthly performance since late 2024.

US Inflation and the Fed’s Next Move

Macroeconomic data from the United States continues to provide a mixed bag for global emerging markets. The PCE price index—the Federal Reserve's preferred inflation gauge—rose 3.8% year-on-year in April. While this was in line with expectations and showed a monthly deceleration to 0.4%, it remains significantly above the Fed's 2% target.

Furthermore, despite a slight uptick in jobless claims to 215,000, the US labor market remains historically tight. This strength gives the Federal Reserve ample room to maintain its restrictive monetary policy for longer, keeping the US Dollar strong and placing continued pressure on emerging market assets like the Rupiah.

Local Agenda and Corporate Actions

As the domestic market reopens after a two-day break, investors are keeping a close eye on several key events. On the government side, the Director of BULOG is overseeing the distribution of sacrificial meat for Eid al-Adha, and the Ministry of Agriculture is holding briefings on plantation downstreaming.

In the corporate world, the calendar is packed with General Meetings of Shareholders (RUPS) for companies like PT First Media Tbk and PT Jasuindo Tiga Perkasa Tbk. Additionally, a long list of companies, including Golden Energy Mines Tbk and Mandom Indonesia Tbk, are approaching their dividend "cum" dates, which may provide some localized support for specific stock prices amidst the broader market gloom.