Indonesia's IHSG Drops 2.59% to 5,936 as Foreigners Buy Rp128.89bn

Indonesia's benchmark Jakarta Composite Index (IHSG) fell 2.59% to close at 5,936.15 on Monday, October 12, 2026. CNBC Indonesia reported the slide left the index at its lowest level in three months. Foreign investors went the other way, posting net purchases of Rp128.89 billion on the day.

The drop wiped out Friday's gains. On October 9 the index rose 62.47 points, or 1.04%, to 6,093.76. One session later it was back below 6,000.

The sources differ on the closing level. Another CNBC Indonesia piece put the close at 5,975.78 with the same percentage decline. A 2.59% fall from 6,093.76 works out to roughly 5,936, so that is the figure used here.

Broad selling, energy hit hardest

Monday's weakness was widespread. Decliners beat gainers 602 to 114, with 77 stocks unchanged.

Trading stayed busy. Volume reached 621.8 million lots worth Rp13.74 trillion across 1.88 million transactions. Energy was the worst-performing sector.

Among the main index movers, DSSA plunged 14.60% and BREN lost 11.48%. BBCA slipped 1.65%. The three were among the day's biggest drags.

A handful of names bucked the trend. MLPT jumped 8.74%, INKP gained 4.83% and BBRI edged up 0.32%. It wasn't nearly enough to offset the selling.

Foreign money comes in anyway

A Rp128.89 billion foreign net buy on a day this rough stands out. The reports don't say what triggered the sell-off or why foreigners were buying.

For context, Sinarmas Sekuritas data cited by CNBC Indonesia showed foreign buying and selling each came to about Rp3 trillion across the market on Friday. In the second session that day, foreigners were net buyers of Rp30.4 billion.

Friday's top foreign net buys were ENRG at Rp34 billion, EMAS at Rp17 billion and ARCI at Rp16 billion. ICBP and SINI took in Rp14 billion each. PTRO, TPIA and ERAA drew Rp13 billion apiece, GGRM Rp12 billion, and DSSA closed out the list at Rp10 billion.

That last name is worth a second look. Foreigners were buying DSSA on Friday, and the stock still fell 14.60% on Monday. One day of foreign inflows did little to protect it once selling hit.

Corporate news: Astra car sales rise

CNBC Indonesia also reported that ASII posted 12.62% year-on-year growth in car sales. The report did not give the period or unit numbers.

What it means for investors

A 2.59% one-day drop to a three-month low leaves the index on shaky ground. Things worth tracking:

Key levels. 6,000 is now the nearest psychological ceiling. Friday's close of 6,093.76 is the yardstick for any rebound, while Monday's 5,936.15 close is the line to watch for further downside.

Whether foreign buying holds. The available data shows a Rp30.4 billion net buy in Friday's second session and Rp128.89 billion on Monday. The question is whether that continues or flips to net selling if the correction drags on.

DSSA and BREN. Double-digit losses in both helped pull the index lower on Monday. Their next moves, along with direction in BBCA and BBRI, are worth watching in coming sessions.

Market breadth. A 602-to-114 split points to pressure well beyond a few large caps. A rising count of advancing stocks would be an early hint that selling is easing.