Global Bond Yields Surge Suddenly, Pushing the JCI and the Rupiah at Risk
Indonesia’s stock market came under renewed pressure on Monday, with the Jakarta Composite Index (JCI) closing down 1.85% or 124.08 points at 6,599.24. The index traded in a range of 6,398.79 to 6,631.28, opening with a drop of more than 2% and briefly sliding more than 4% in the first session.
Trading activity was fairly brisk, with turnover at Rp20.47 trillion, involving 29.72 billion shares in 2.54 million trades. Market capitalisation declined to Rp11,539 trillion. Foreign investors were net sellers to the tune of Rp463.9 billion.
Pressure came primarily from stocks recently removed from MSCI indices. Dian Swastatika Sentosa Tbk (DSSA) and Chandra Asri Pacific Tbk (TPIA) were the main drag on the JCI, contributing around 13.67 points and 13.23 points respectively. Since the morning, both DSSA and TPIA had fallen to their lower auto-reject limit (ARB), down about 15%.
Besides those two, heavyweight banks also weighed on the JCI. Bank Rakyat Indonesia (Persero) Tbk (BBRI) contributed about 12.55 points, while Bank Mandiri (Persero) Tbk (BMRI) subtracted around 6.26 points.
From the currency market, the rupiah closed sharply weaker against the US dollar. It breached the psychological level above Rp17,600 per US$, marking the weakest close on record.
The rupiah weakness occurred in the first session after the long religious holiday weekend. Domestic market sentiment, alongside global factors, pressured the rupiah.
One of the main concerns was changes in the MSCI index composition. In the May 2026 review, MSCI formally removed six Indonesian stocks from the Global Standard Index. The removal drew attention as it could reduce Indonesia’s weight in the emerging markets index. DBS economist Radhika Rao noted the weight could fall to around 0.5-0.6% from nearly 0.8%.
“Lower Indonesia weight would push investors to rebalance portfolios, potentially triggering additional moderate foreign outflows,” Rao wrote in Indonesia markets: MSCI rebalances index, slippery rupiah, cited Monday (18 May 2026).
Global investors following MSCI indices could rebalance. As Indonesia’s weight falls, demand to hold Indonesian stocks would ease. This pressure could open space for further foreign fund outflows from the domestic stock market. Ultimately, demand for the rupiah would also weaken because foreign inflows into equities are not yet strong enough.
From the bond market, the 10-year government bond yield closed up sharply by 2.12% to 6.851% on Monday. The rise in yields shows that bond prices are falling due to selling pressure. The situation demonstrates that pressure is not limited to equities and the rupiah but is spreading to the government bond market.
From the US stock market, Wall Street closed mixed on Monday or early Tuesday in Indonesia. Nasdaq Composite and S&P 500 closed lower, pressured by declines in technology shares. Investors tracked oil prices and yields while awaiting further developments on the Middle East conflict. The S&P 500 fell 0.07% to 7,403.05, while Nasdaq dropped 0.51% to 26,090.73. Dow Jones rose 159.95 points or 0.32% to 49,686.12.
Seagate Technology led the sell-off in the memory chip sector after the company’s CEO said at a JP Morgan conference that building a new plant would take too long. Seagate shares fell almost 7% and pulled Micron Technology down almost 6%. The statements reinforced concerns that the memory-chip industry still lacks the capacity to meet surging demand. Western Digital fell 4.8% and SanDisk declined 5.3%.
In addition, AI-related stocks such as NVIDIA and Broadcom fell about 1% each.
This movement comes at a delicate time for markets. Last week, the S&P 500 and Nasdaq had reached new highs, while the Dow briefly breached the 50,000 level.
Market participants should watch a number of key cues today. Domestically, attention focuses on the start of Bank Indonesia’s Board of Governors meeting amid heavy pressure on the rupiah and stock market. Internationally, China’s economic data drew attention after retail sales slowed sharply, even as unemployment began to ease.
Surge in global sovereign yields has also become a new ‘ghost’ haunting global financial markets, including Indonesia.
Additionally, the results of a meeting between the DPR and BI remain in focus as they show the central bank is under pressure to maintain rupiah stability, especially after the US dollar breached Rp17,600 per US$.
- Bank Indonesia Board of Governors Meeting Begins
Bank Indonesia (BI) will begin the Board of Governors’ Meeting (RDG) today, Tuesday (19/5/2026). The meeting will run for two days, until Wednesday (20/5/2026), and is one of the main focal points for market participants this week. In the RDG, BI will announce the latest decisions on the direction of the policy rate (the sentence in the original is truncated).