5 Indonesia Stock Picks for Sept. 4: ASII, AMMN, JPFA, ANTM and RATU

Indonesian equities enter Friday's session with stronger momentum after the Jakarta Composite Index gained more than 1% and foreign investors returned as substantial net buyers.

Against that backdrop, Mega Capital Sekuritas published five trading ideas for September 4, 2026: ASII, AMMN, JPFA, ANTM and RATU.

The setups include specified entry zones, upside targets and stop-loss levels.

Mega Capital's Sept. 4 Trading Ideas

The levels are trading scenarios attributed to Mega Capital Sekuritas rather than forecasts that the stocks will inevitably reach those prices.

Actual market conditions can change rapidly once trading begins.

JCI Gains 1.09%

Indonesia's benchmark ended Thursday at 6,667.89, gaining 72.11 points or 1.09%.

Nine of the exchange's 11 sector indexes finished higher, with Transportation & Logistics leading at approximately 2.45%.

Technology was the weakest sector, falling about 1.62%.

Large-cap stocks provided significant support.

Astra International, or ASII, jumped 4.34% to Rp5,050.

Bank Central Asia, or BBCA, gained 1.50% to Rp6,775, while Bank Mandiri, or BMRI, advanced 2.29% to Rp4,460.

Amman Mineral Internasional, or AMMN, rose 3.75% to Rp4,430.

That means two of Mega Capital's Friday trading ideas—ASII and AMMN—are entering the session after strong one-day advances.

Foreign Investors Return With Rp1 Trillion-Plus Buying

Foreign flows also improved sharply.

International investors recorded approximately Rp1.11 trillion in net purchases in Indonesia's regular equity market on September 3.

Across all markets, foreign net buying reached roughly Rp1.07 trillion.

BMRI was the largest foreign net-buy target at about Rp471.38 billion.

BBCA followed at Rp207.10 billion, CPIN at Rp131.92 billion and ANTM at Rp108.95 billion.

ASII also appeared among the largest foreign buying targets with approximately Rp64.17 billion of net purchases.

The data provides additional context for ANTM and ASII, but one day of foreign buying should not be treated as proof that the flow will continue.

Wall Street Provides a More Supportive Global Backdrop

U.S. equities also finished strongly higher on September 3.

The Dow Jones Industrial Average gained 1.18% to 53,686.11.

The S&P 500 rose 1.06% to 7,747.71, while the Nasdaq Composite advanced 1.40% to 26,584.06.

The rally came as Federal Reserve Governor Christopher Waller's comments reduced fears of an imminent rate increase and helped pull Treasury yields lower.

A stronger Wall Street session does not guarantee gains in Indonesia, but it gives Asian markets a more constructive external backdrop heading into Friday.

Indonesia-Linked Assets Rise Abroad

Indonesia-focused market instruments also strengthened.

The iShares MSCI Indonesia ETF, or EIDO, gained 1.69% to close at $13.22 on September 3.

The MSCI Indonesia Index rose 1.43% to 4,400.93.

The moves were consistent with the stronger JCI and renewed foreign inflows into Indonesian large-cap equities.

ASII Starts Near Its Buy Zone Ceiling

ASII closed Thursday at Rp5,050 after a 4.34% rally.

Mega Capital's buy range is Rp5,000–Rp5,050, placing the previous close at the upper edge of the proposed entry zone.

The first target is between Rp5,125 and Rp5,175, while the stop-loss level is Rp4,740.

That makes Friday's opening particularly relevant.

If ASII opens significantly above the recommended zone, traders using the original setup would face a different risk-reward profile.

The stock's strong previous-session gain also means short-term profit taking cannot be ruled out.

AMMN Faces a Similar Setup

AMMN ended September 3 at Rp4,430 after gaining 3.75%.

That price is also exactly at the upper boundary of Mega Capital's Rp4,400–Rp4,430 buy zone.

The stated target is Rp4,480–Rp4,530 with a stop loss at Rp4,160.

As with ASII, a large opening gap could make the original entry assumptions less relevant.

The distinction matters because trading recommendations are usually built around specific entry prices rather than simply the ticker itself.

ANTM Has Foreign-Flow Support

ANTM was among Thursday's most heavily accumulated stocks by foreign investors, recording approximately Rp108.95 billion in net buying.

Mega Capital's trading setup places the buy zone at Rp3,120–Rp3,150.

The target range is Rp3,180–Rp3,220 with a stop loss at Rp2,970.

Foreign flow and technical analysis, however, measure different things.

Foreign buying can reverse, and it does not guarantee that a technical target will be reached.

JPFA and RATU Complete the List

JPFA carries a proposed entry range of Rp2,350–Rp2,380.

Its target stands at Rp2,430–Rp2,470, with a stop loss of Rp2,240.

RATU's buy range is Rp4,480–Rp4,510, with upside targets at Rp4,570–Rp4,630 and a stop loss at Rp4,240.

For both stocks, the relevance of those levels depends on where prices actually trade once the market opens.

A ticker can remain attractive in an analyst's view while the original trade setup becomes less favorable if the price moves too far away from the intended entry.

Indonesia Is Also Preparing a Major Exchange Reform

Investors are watching more than daily price movements.

Indonesia's Financial Services Authority, or OJK, expects to finalize regulations governing the demutualization of the Indonesia Stock Exchange during September 2026.

Under the draft framework, ownership of IDX shares would generally be capped at 5% for any single shareholder, including both exchange members and non-members.

Certain strategic shareholders could be permitted to exceed that threshold following regulatory review and approval.

Potential strategic parties mentioned by OJK include Danantara Indonesia, Bank Indonesia and the Ministry of Finance.

Demutualization would fundamentally broaden the exchange's ownership structure and allow participation beyond the brokerage firms that traditionally own the exchange.

IDX Has Already Postponed Its Sept. 15 Meeting

The regulatory process has already affected IDX's corporate calendar.

The exchange had planned an extraordinary general meeting of shareholders for September 15.

That meeting has now been formally postponed until the OJK demutualization regulation is issued.

IDX President Director Jeffrey Hendrik said the exchange intends to review the regulation first before moving to the next stage.

No replacement meeting date has been announced.

WINR Expands Its Internet Strategy

Corporate news is also providing several company-specific catalysts.

Winner Nusantara Jaya, or WINR, has revised its planned ownership of internet service provider Laxo Global Akses from 60% to 90%.

The revised agreement was formalized through an addendum signed on September 2.

WINR currently owns approximately 8.5% of Laxo and plans to increase its ownership through additional capital contributions.

The property developer wants to integrate Laxo's internet services into its developments through bundled connectivity and smart-property offerings.

Laxo operates in about 30 cities and has more than 100 corporate and government clients as well as more than 10,000 retail customers.

The strategy is intended to give WINR a larger recurring-revenue component beyond traditional property sales.

ERAA Begins a Rp500 Billion Buyback

Erajaya Swasembada, or ERAA, is beginning a three-month share-buyback program on September 4.

The company has allocated up to Rp500 billion from internal cash and may repurchase as many as 797.5 million shares, equivalent to a maximum of 5% of paid-in capital.

The program is scheduled to run through December 4, 2026.

Based on the company's pro forma calculations, full use of the Rp500 billion budget would reduce assets from approximately Rp28.86 trillion to Rp28.36 trillion and equity from Rp10.18 trillion to Rp9.68 trillion.

Net income and earnings per share are expected to remain unchanged, with EPS at roughly Rp75.68.

A buyback can reduce the number of shares available in the market, but it should not automatically be interpreted as a guarantee of higher share prices.

What Traders Should Watch on Sept. 4

Friday begins with several constructive signals: a 1.09% JCI gain, more than Rp1 trillion in foreign net buying, stronger U.S. equities and gains in Indonesia-linked international benchmarks.

But those signals still need to translate into actual buying during Friday's session.

For Mega Capital's five trading ideas, the most important issue is whether ASII, AMMN, JPFA, ANTM and RATU remain close enough to their proposed entry zones to preserve the original risk-reward assumptions.

ASII and AMMN are particularly worth watching because both ended Thursday at the upper edges of their respective buy ranges after sharp gains.

If prices gap substantially higher, chasing them would no longer represent the same trading setup.

Market direction, volume, foreign flows and disciplined stop-loss execution therefore remain critical.

Disclaimer: This article is for informational and educational purposes only. The buy ranges, targets and stop-loss levels are trading ideas attributed to Mega Capital Sekuritas and do not constitute personalized investment advice or a solicitation to buy or sell securities.