The Indonesia Stock Exchange (IDX) is implementing a significant market microstructure overhaul by lowering its minimum share price floor from Rp 50 to Rp 1, effective September 28, 2026. This change aims to allow market forces to determine the true value of stocks, particularly for the 49 shares that were trading at exactly Rp 50 as of September 23, 2026, and the approximately 20 issuers whose prices are perceived to be below Rp 50.

This reform is expected to address concerns raised by MSCI regarding price formation and transparency, which had put Indonesia's emerging-market status at risk. The previous Rp 50 floor often froze stocks, making them untradeable and leading to 111 of the Jakarta Composite Index's 900 members trading at or below Rp 50. For example, GoTo Gojek Tokopedia (IDX: GOTO) was stuck at Rp 50 since May, leading MSCI to drop it from its Global Standard Index.

The new Rp 1 to Rp 10 price bracket will have unique auto-rejection limits, allowing a maximum daily price movement of Rp 1, unlike other brackets where limits are percentage-based. This could lead to significant daily percentage changes, from 10% to 100%, and potentially increase volatility and speculative trading in this micro-cap segment. However, 92 out of 93 brokerage members have achieved technical readiness for this transition, according to IDX President Director Jeffrey Hendrik.

The move is seen as a step towards improving liquidity and price discovery for distressed companies, referred to as "zombie companies," whose shares were trapped at the Rp 50 floor. While this could expose their true financial condition and create opportunities for value investors, it also carries the risk of increased volatility and speculation, particularly for retail investors.