How Redefining Free Float MSCI Can Distort the Dynamics of the Indonesian Stock Market

Changes to MSCI’s index regulation being considered could create a major wave in Southeast Asian financial markets. If this leading global index provider enforces stricter standards for calculating free float—the proportion of shares truly available for public trading—Indonesian stock markets face a real threat of large-scale foreign fund withdrawals.

This concern is not mere speculation. Analysts estimate that international passive funds could withdraw over $2 billion from Indonesian exchanges if the methodology changes are implemented. For context, this is a significant portion of the $971 billion equity market.

Reassessing MSCI Methodology and Potential Impact of Fund Withdrawals

MSCI has scheduled an announcement for the end of January 2026 to decide whether to adopt a more stringent interpretation of free float. This decision will take effect in their official index review in May 2026—just around the corner.

The free float calculation methodology is theoretically simple: subtract strategic investor holdings from total outstanding shares. However, in Indonesia’s real market, complex and dispersed ownership structures make this calculation a serious challenge. MSCI highlighted these difficulties in their recent public consultation.

What’s interesting is that new data now allows for more precise identification of shareholder types, including those with holdings below the 5% threshold, which previously did not need to be disclosed on the Indonesia Stock Exchange. This opens previously hidden information.

Indonesia’s Ownership Structure Distorting Free Float Calculations

The core issue lies in the ownership patterns of large Indonesian companies. Over 200 stocks in the Jakarta Composite Index (JCI) have free float below 15%—a figure much lower than other major markets in Asia-Pacific. Indonesia’s average free float is the lowest in the region.

Giant corporations like PT Petrindo Jaya Kreasi (84% owned by billionaire Prajogo Pangestu) and PT Barito Pacific (71% owned by Pangestu) exemplify the classic pattern: large companies tightly held by a small group of wealthy individuals. This structure distorts perceptions of how many shares are actually available for investors to buy.

Gary Tan, portfolio manager at Allspring Global Investments, clearly captures the essence: “This is a pivotal moment for Indonesia’s capital market reform, highlighting the need for stronger corporate governance to attract more global investors and long-term capital.”

The discrepancy between the JCI and MSCI Indonesia Index has been stark. Last year, when the JCI surged over 22% to a record high, the MSCI Indonesia Index actually declined 3%. This dramatic difference reflects how many low-liquidity stocks in the JCI distort the true market performance picture.

Liquidity Challenges in Raising Free Float Standards

Regulators are considering raising the minimum free float requirement from the current 7.5% to 10-15%, with a long-term target of 25%. This would bring Indonesia closer to Hong Kong and India (both at 25%) and Thailand (15%).

However, progress is slow. Ironically, government tax incentives—exempting individuals and companies from income tax if they reinvest dividends within three years—actually encourage ownership concentration. This runs counter to MSCI’s goals.

Deeper challenges lie in market liquidity. Exchange leaders warn that if companies increase their free float, the market will need much greater absorption capacity. Christopher Andre Benas, head of research at PT BCA Sekuritas, expressed a realistic concern: “Liquidity may not materialize, as institutional investors are likely to remain selective and retail investors may lack the capital to absorb excess supply.”

The exchange is also working on stricter listing standards for small companies, but this is a process requiring coordination and time.

Outlook for Capital Market Reform Ahead of MSCI Announcement

Despite these challenges, Dimas Yusuf, CIO at PT Sucorinvest Asset Management, remains optimistic: “Given Indonesia’s long-term equity growth prospects, it’s still too attractive for MSCI to keep reducing its index weight.”

Indonesia’s solid economic growth and large market size remain fundamental attractions. However, the distorted market structure that affects perceived investability is a real obstacle.

MSCI emphasizes that the proposed changes aim to improve transparency and close information gaps. One proposal is to use the lowest free float figures from public documents or new datasets, which could reduce the free float market capitalization of 15 index constituents.

With May 2026 approaching fast, Indonesia’s stock market stands at a critical crossroads. MSCI’s decision will not only determine capital inflows or outflows but also send a signal about whether Indonesia’s market structural reforms can align with increasingly stringent global transparency standards.