Indonesia’s JCI rises 0.33% as investors await Bank Indonesia rate decision

JAKARTA, 23 SEPTEMBER 2026 —

Indonesia’s benchmark Jakarta Composite Index (JCI) opened 0.33% higher at 6,297.95 in early trading Wednesday, as investors adopted a cautious stance ahead of Bank Indonesia’s (BI) monetary policy meeting.

The LQ45 index, tracking 45 large-cap stocks, climbed 0.25% to 627.17, reflecting subdued trading activity ahead of the central bank’s decision on its benchmark BI rate.

Analysts at Phintraco Sekuritas project the JCI could test the 6,186–6,200 range later in the session, according to a research note from Ratna Lim, head of research at the firm. The central bank is widely expected to hold the BI rate at 5.75%, following the Federal Reserve’s recent 25-basis-point hike to 4%, which has narrowed the interest-rate spread between the US and Indonesia to 1.75 percentage points—down from 2% previously.

The spread remains wider than the three-year average of 0.75–1.25%, raising concerns over potential capital outflows if BI fails to adjust policy. Lim said BI is unlikely to raise rates further unless the rupiah weakens sharply or inflation exceeds the central bank’s target. Falling oil prices, which dropped 1% Tuesday to close below US$100 a barrel, are easing inflationary pressures, while credit growth is expected to accelerate to 15% year-on-year in August.

For Malaysian investors, the JCI’s modest gain highlights regional market interdependence, particularly through commodity-linked exposures and cross-border capital flows. BI’s policy stance will influence rupiah stability, which in turn affects regional currency markets and trade-linked stocks. A weaker rupiah could pressure Malaysian exporters reliant on Indonesian demand, while BI’s decision may also impact cross-border investment flows.

Geopolitical tensions and oil markets weigh on sentiment Global risks dominated investor focus, with US-Iran talks at the UN General Assembly sparking hopes of de-escalation. US President Donald Trump signaled potential easing in tensions, while Iran reportedly offered to reopen the Strait of Hormuz if US military activity subsided. Saudi Arabia also plans to resume oil shipments via its pipeline this week.

Oil prices, which have fallen 4% this week but remain up 9% month-to-date, reflect mixed signals. Meanwhile, US Treasury yields held steady near 4.959%, as investors await further economic signals. European markets closed mixed Tuesday, with the UK’s FTSE 100 down 0.29% and Germany’s DAX up 0.02%. Asian markets opened lower Wednesday, with Hong Kong’s Hang Seng down 0.84% and Shanghai’s Composite off 0.37%.

The JCI’s performance underscores the delicate balance BI faces between supporting economic growth and maintaining rupiah stability. With inflationary pressures easing and credit growth accelerating, the central bank may prioritize growth over aggressive rate hikes unless external conditions deteriorate further. For Malaysian businesses with exposure to Indonesia, BI’s decision will be closely watched, particularly for its potential impact on regional trade and currency stability.

Related: Bank Indonesia · Ratna Lim · Jakarta