Indonesian stocks fell more than 11% on October 16. That was their steepest one-day drop since January 1998. The fall came one day after MSCI announced a proposal on October 15. MSCI is a company that builds stock market indexes. Many global funds copy those indexes. MSCI proposed moving Indonesia out of its emerging-market group. Indonesia would go into a "standalone" category of its own.
If MSCI makes that change, funds that track its emerging-market indexes could have to sell their Indonesian shares. To track an index means to copy its holdings. MSCI will take feedback until April 30, 2027. Its final decision is due by June 30, 2027. Investors sold on the first trading day after the announcement.
The index provider's role
An index is a list of stocks with a rule for how much of each to hold. The S&P 500 is one example. MSCI runs many other indexes. It groups them by country and by how developed each stock market is.
A large share of investment money sits in passive funds, known as index funds. A passive fund buys whatever an index holds, in the same proportions. It changes its holdings when the index changes. An exchange-traded fund, or ETF, is a common form. Its shares trade on a stock exchange like a single company's stock.
This setup gives MSCI a strong say over where the money goes. MSCI decides which countries belong in its indexes, using its published rules. A manager of a fund that tracks an MSCI index has no vote on that list. If MSCI removes a country, the tracking fund removes it as well, on the date the index changes.
The emerging-market label
MSCI sorts countries into tiers. Developed markets include the US, Japan and Germany. Emerging markets are large economies with stock markets that are open to foreign buyers but less mature. Korea and Brazil sit in this group. Frontier markets are smaller, and investors find them harder to trade.
A standalone market sits outside these tiers. MSCI calculates an index for it. MSCI leaves it out of its main emerging-market and frontier indexes.
Most global money for these countries sits in the emerging-market tier. Many funds track an MSCI emerging-market index. Others measure their results against one. Investors call that yardstick a benchmark. These funds hold Indonesian shares because the index holds them. A move to standalone status would take Indonesia out of the index. Funds that copy the index would then have to sell.
The case MSCI made
MSCI cited "persistent concerns over transparency, ownership structures and suspected coordinated trading." Transparency here means how much investors can see about who owns a company. Ownership structures are the ways owners hold and control companies. Coordinated trading means groups of traders acting together to push a price. MSCI said Indonesia's reforms "had not yet delivered sufficient evidence of meaningful improvements in market governance and enforcement." Market governance means the rules for how a market runs. Enforcement means regulators acting on those rules.
MSCI warned of this step in June. It said it might open a consultation if Indonesia did not show enough progress by the November 2026 index review. An index review is MSCI's scheduled check of its indexes. A consultation is a formal comment period. Investors and other market users send their views before MSCI makes a final call. MSCI announced the consultation on October 15. It said it expects to proceed unless the feedback contains clear evidence of substantial improvements.
MSCI had a smaller step available. It could have moved Indonesia down one tier, from emerging to frontier. MSCI rejected that option. "A reclassification to Frontier Markets would not properly recognise the depth of the market problems," MSCI said. Reclassification means moving a country to a different group. In MSCI's words, keeping Indonesia in the emerging-market group is "no longer appropriate."
MSCI will keep an existing freeze on Indonesian stocks. Under the freeze, MSCI blocks certain index changes for those stocks. These include additions and upward migrations. An addition is a company entering the index for the first time. An upward migration is a growing company moving from MSCI's small-company index into its main index. Under the freeze, Indonesian companies cannot take either step.
The reaction on October 16
Investors sold from the opening bell. The Jakarta index fell 8% early in the session. The exchange halted trading for 30 minutes. A trading halt is a pause the exchange orders to stop buying and selling. The index closed down more than 11%. That was its worst day since January 1998, during the Asian financial crisis. The index has lost nearly 40% this year.
The Jakarta index fell more than 11% on October 16, its steepest one-day drop since January 1998
Indonesia's currency, the rupiah, fell with the stocks. It lost about 0.8% against the dollar on October 16, to around 18,060 per dollar. In June it hit 18,209, its weakest level on record. A foreign investor loses twice when the rupiah weakens. The share price falls, and each rupiah from the sale buys fewer dollars.
Moody's and Fitch, two credit-rating firms, lowered Indonesia's credit-rating outlook to negative. They cited policymaking credibility, meaning how far investors can trust the government's decisions. A credit rating grades how likely a borrower is to repay its debts. A negative outlook is a formal warning that the firm could cut the rating later. For a government, a lower rating can raise the interest rate it pays to borrow.
Stock indexes in the rest of Asia rose. Korea's main index, the KOSPI, rose 4.23% on October 16. Japan's Nikkei 225 gained 1.97%. Hong Kong's Hang Seng added 1.07%. The Shanghai Composite rose 0.70%, and India's Nifty 50 gained 0.37%. Indonesia fell on its own news while the region rose.
Major Asian stock indexes rose on October 16 while Indonesian stocks fell
Selling before the decision
MSCI's final decision is due by June 30, 2027. Investors began selling on the first day. The reason lies in the way index funds trade.
Index funds follow a calendar. They sell on the day an index change takes effect. MSCI publishes that date in advance. Other investors can read the same calendar. An investor who sells before that date avoids trading at the same moment as a large group of forced sellers. Early sellers push the price down before any index fund has to act.
Active managers face a second problem. Active managers choose their own stocks. Many of them measure their results against an MSCI emerging-market index. If Indonesia leaves that benchmark, a manager who keeps Indonesian shares holds stocks the benchmark no longer holds. Those holdings can pull the fund's results away from its benchmark, up or down.
The freeze adds to the pressure. While it lasts, no Indonesian company can enter the index or move up a tier. Indonesian shares lose a source of new index buying during the consultation.
Dates to watch
- November 2026: MSCI's index review, the checkpoint MSCI named in June.
- April 30, 2027: MSCI stops taking feedback on the consultation.
- June 30, 2027: MSCI's final decision is due.
MSCI has said it expects to proceed unless the consultation turns up clear evidence of substantial improvements. On these dates, MSCI will publish the documents that tracking funds must follow.
Owning an emerging-markets fund
An emerging-markets index fund holds the countries its index provider says belong there. A country can enter or leave because of the provider's rules on ownership data, trading conduct and enforcement.
Index providers can move prices faster with a rule change than companies can with their news. Indonesian companies reported no results that explain an 11% one-day fall on October 16. MSCI's label proposal on October 15 came first.
For a holder of a broad emerging-markets fund, the country mix comes from a rulebook. The index methodology is the provider's written set of rules. From the methodology and the provider's review calendar, a fund holder can see which changes could reach the fund. In Indonesia's case, investors sold on a proposal from that calendar within one trading day.
Sources
Not investment advice.