Note: This article discusses Indonesian financial products and markets. The principles apply globally, though specific products, regulations, and tax treatments vary by country.

Why Not Invest Everything in IHSG Only?

“I live in Indonesia, earn income in Rupiah, so investing only in IHSG should be enough.” This logic sounds reasonable, but it contains hidden risks often ignored.

Putting 100% of your portfolio in one country — even your own — is a form of risk concentration that can be costly.

Home Bias: A Natural but Dangerous Tendency

Home bias is investors’ tendency to allocate too much to their own country’s stock market. This happens in every country:

• Japanese investors put 55% in Japanese stocks (even though Japan is only 6% of the global market)
• Australian investors put 60%+ in Australian stocks (even though Australia is only 2% of the global market)
• Indonesian investors? Nearly 100% in IHSG (even though Indonesia is only ~0.3% of the global stock market)

You’re putting your entire investment wealth in 0.3% of the world’s market. That’s not diversification — that’s extreme concentration.

IHSG: Good, But Not Always

IHSG’s performance has indeed been quite good in the long term. But there are extended periods where IHSG was very disappointing:

Period	IHSG Performance	Notes
1997-1998	-65%	Asian Crisis, Indonesian economy collapsed
2008	-51%	Global financial crisis
2013	-1%	Taper tantrum, Rupiah weakened sharply
2015	-12%	China economic slowdown
2020	-5% (annual)	COVID-19
2008-2015 (7 years)	Volatile, sideways	Investors who entered at the 2007 peak had to wait years

Compare this to the US market (S&P 500) which rose more than 400% during 2010-2024. IHSG rose about 50-60% in the same period.

No market always wins. But if you only have IHSG, you’re completely dependent on Indonesia’s economy.

IHSG’s Structural Problems

1. Highly concentrated in a few sectors

IHSG is dominated by:

• Banking (BBCA, BBRI, BMRI, BBNI) — about 30-35% of IHSG
• Commodities (ADRO, PTBA, ANTM) — very cyclical
• Telecommunications (TLKM) — one dominant company

If Indonesia’s banking sector has problems, IHSG will fall drastically. There’s no adequate sector diversification.

2. Lack of technology companies

The world’s largest tech companies (Apple, Microsoft, Google, NVIDIA) aren’t in IHSG. The global digital economy is growing rapidly, but IHSG investors don’t benefit from it.

Indonesia has GoTo (GOTO) and Bukalapak (BUKA), but their performance since IPO has been very disappointing — down 60-80% from IPO price.

3. Currency risk

The Rupiah tends to weaken against USD in the long term:

• 2000: ~Rp 8,500/USD
• 2010: ~Rp 9,000/USD
• 2020: ~Rp 14,000/USD
• 2025: ~Rp 16,000/USD

If all your investments are in Rupiah, your wealth in dollars (international purchasing power) keeps eroding. Investing in USD-denominated assets helps protect against Rupiah depreciation.

What’s the Solution?

This doesn’t mean you shouldn’t invest in IHSG. IHSG should still be part of your portfolio. But not 100%.

Global diversification options from Indonesia:

Option	Access Method	Advantages	Disadvantages
IHSG index funds	Bibit, Bareksa	Easy, cheap, tax-free	Indonesia only
Global stock funds	Some fund managers offer them	Global diversification via Rupiah	Limited choices, high expense ratio
US stocks via local broker	Gotrade, Pluang, Stockbit Global	Direct access to S&P 500 stocks	Transfer costs, more complex taxes
Global ETFs via foreign broker	Interactive Brokers	Full access to global ETFs	High minimum, more complicated taxes

Reasonable allocation:

Profile	IHSG	Global/USD
Conservative	80%	20%
Moderate	60-70%	30-40%
Aggressive	50%	50%

There’s no “correct” number — what matters is you’re not 100% in one market.

”But I Need Rupiah for Daily Living”

True, and this is a valid argument. But:

1. You won’t use long-term investments for daily shopping. These investments are for 10-30 years from now.
2. In 10-30 years, who knows the Rupiah’s value? Currency diversification is protection.
3. Many future needs are denominated in dollars: children’s education abroad, imported goods, technology, even traveling.

Lessons from Other Countries

Investors in the following countries who only relied on local markets suffered major losses:

• Japan: Nikkei reached its peak of 38,916 in 1989. It only returned to that level in 2024 — 35 years later.
• Russia: The Russian stock market closed after the Ukraine invasion in 2022. Foreign investors lost everything.
• Argentina: 100%+ annual inflation destroyed asset values in local currency.

Indonesia isn’t Japan or Argentina, but we can’t predict the future. Diversification is insurance against bad scenarios.

What You Can Do Now

1. Keep investing in IHSG through index funds (Bahana IDX30, BNP Paribas SRI-KEHATI)
2. Add global exposure — start with 10-20% of portfolio
3. Easiest method: open an account at Gotrade or Pluang, buy S&P 500 ETF (VOO/SPY) regularly
4. Or: find global stock mutual funds available on Bibit/Bareksa

Diversification doesn’t have to be complicated. Starting with a small portion in global assets is already much better than 100% IHSG.

Summary

Misconception	Reality
IHSG is enough for diversification	Indonesia is only 0.3% of the global stock market
IHSG always rises long-term	There are extended periods of sideways movement and major declines
I don’t need dollar assets	Rupiah weakens on average 3-4% per year vs USD
Global investing is too complicated	Can already be done from your phone via Gotrade, Pluang

IHSG remains important in your portfolio — but don’t make it your only one.

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Disclaimer: This article is for educational purposes only, not investment advice.

Concentration Risk: What Happens When One Country Struggles

The risk of putting all your wealth in one country becomes clear when we examine specific scenarios:

Scenario 1: Sustained Economic Slowdown

Indonesia’s GDP growth has been strong historically (5-6% annually). But what if growth slows to 2-3% for a decade due to:

• Declining commodity prices (Indonesia exports coal, palm oil, nickel)
• Aging population reducing workforce growth
• Inability to move up the value chain (middle income trap)
• Political instability affecting foreign investment

IHSG returns would likely stagnate or decline in real terms. Investors with 100% IHSG portfolios would see their wealth erode for years with no alternative source of returns.

Meanwhile, global markets might still deliver positive returns as other regions (US tech, European manufacturing, Asian emerging markets) compensate.

Scenario 2: Regulatory or Policy Shocks

Changes in government policy can dramatically impact specific markets:

• Mining nationalization (happened in several countries)
• Banking sector regulations that compress margins
• Capital controls limiting fund outflows (happened during 1998 crisis)
• Tax increases on dividends or capital gains

A diversified investor with holdings in multiple countries is partially insulated. A 100% IHSG investor bears the full impact.

Scenario 3: Natural Disasters or Major Crisis

Indonesia sits on the Pacific Ring of Fire. A major earthquake, tsunami, or volcanic eruption could severely disrupt the economy and markets for years.

While this is a tail risk (low probability), the impact would be catastrophic for a portfolio with no geographic diversification.

Indonesia’s Economic Structure: Hidden Vulnerabilities

Beyond market performance, Indonesia’s economy has structural characteristics that increase risk:

Heavy Commodity Dependence

Indonesia is a major exporter of:

• Coal (world’s largest exporter)
• Palm oil (world’s largest producer)
• Nickel (critical for batteries, but cyclical demand)

When commodity prices collapse (as in 2014-2016), Indonesia’s economy suffers:

• Export revenues fall
• Rupiah weakens
• Government budget strained
• IHSG declines as mining and plantation stocks drop

This correlation means bad economic conditions → bad market returns, with no diversification benefit.

Manufacturing Weakness

Unlike South Korea, Taiwan, or China, Indonesia has not built a strong high-value manufacturing base:

• Electronics manufacturing is minimal
• Automotive is mostly assembly, not design/engineering
• Pharmaceutical and medical devices heavily imported

This limits long-term growth potential and means Indonesia underperforms when global manufacturing booms.

Financial Sector Concentration

Indonesian banks (BBCA, BBRI, BMRI, BBNI) dominate IHSG, representing 30-35% of index weight. This creates several risks:

1. Interest rate sensitivity: Rising rates compress margins; falling rates reduce lending profitability
2. Asset quality risk: Economic downturns lead to non-performing loans (NPLs) spiking
3. Regulatory risk: Bank Indonesia or OJK rule changes can significantly impact profitability
4. Fintech disruption: Digital payment platforms (GoPay, Dana, OVO) erode traditional banking revenue streams

If Indonesian banking faces structural headwinds, a huge chunk of IHSG underperforms.

Correlation Is Not Diversification

Some investors argue: “But IHSG contains many companies in different sectors—that’s diversified enough!”

This confuses sector diversification with geographic/economic diversification.

How Markets Correlate During Crises:

During major downturns (2008, 2020), nearly ALL Indonesian stocks fell together:

• IHSG dropped 51% in 2008 (peak to trough)
• Didn’t matter if you owned banks, mining, telecoms—everything collapsed
• This is because they all depend on the same underlying economy

In contrast, a globally diversified portfolio benefits from:

• Negative correlations: When one region struggles, others may prosper (e.g., USD strengthens as emerging markets weaken)
• Asynchronous cycles: US, Europe, China, and emerging markets don’t peak/trough simultaneously
• Currency diversification: USD holdings rise in Rupiah terms when Rupiah weakens

Example from 2013:

• IHSG down ~20% as Rupiah collapsed and foreign capital fled
• US S&P 500 up ~30% the same year
• A 70/30 IHSG/SPX portfolio would have been down only ~8% vs. pure IHSG at -20%

The Psychology of Home Bias

Why do intelligent investors exhibit such strong home bias? Several psychological factors:

1. Familiarity Breeds Comfort (False Comfort)

• “I understand Indonesian companies because I use their products/services”
• Reality: Familiarity ≠ knowledge. Most retail investors don’t actually understand bank balance sheets or mining economics
• US companies (Apple, Google, Amazon) are arguably MORE understandable—you use their products daily and their financials are transparent

2. Patriotic Bias

• “I should support my own country’s economy”
• Reality: Investment returns and patriotism are separate. Your portfolio’s job is to grow wealth, not express national loyalty
• You can support Indonesia through taxes, consumption, voting—not by concentrating investment risk

3. Complexity Avoidance

• “Investing abroad seems complicated—taxes, currency conversion, foreign platforms”
• Reality: As of 2025, platforms like Gotrade make it as easy as Indonesian apps
• The “complexity” excuse is increasingly invalid

4. Recency Bias

• “IHSG has done well for the past 5 years, so it will continue”
• Reality: Past performance doesn’t predict future results (every disclaimer says this for a reason)
• 2002-2008 IHSG boom created a generation of investors who learned painful lessons in 2008

Building a Global Portfolio: Practical Steps

For Indonesian investors ready to diversify beyond IHSG, here’s a concrete implementation guide:

Step 1: Start Small (Month 1-3)

• Choose one platform: Gotrade (easiest for beginners) or Pluang
• Complete KYC (identity verification)
• Transfer IDR 1-5 million as a test
• Buy one US index ETF (VOO, VTI, or SPY)—get comfortable with the process

Step 2: Set Regular Allocation (Month 4-12)

• Decide target: e.g., 70% IHSG / 30% US stocks
• Don’t convert existing portfolio yet (avoid timing risk)
• For NEW monthly contributions:
  • 70% to IHSG index fund (via Bibit/Bareksa)
  • 30% to US index ETF (via Gotrade/Pluang)

Step 3: Gradual Rebalancing (Year 2+)

• Once comfortable, gradually shift existing IHSG holdings to global assets
• Do this over 6-12 months to avoid exchange rate timing risk
• Don’t sell IHSG during market lows—wait for recovery periods

Step 4: Optimize (Year 3+)

• Consider more sophisticated allocations (adding bonds, REITs, small-cap value)
• Evaluate tax optimization strategies
• For large portfolios (>IDR 500M), consider IBKR for lower costs

Tax Considerations:

• US stocks: 15% withholding on dividends (vs. 0.1% final tax on IHSG)
• Capital gains: Technically taxable as income in Indonesia, but enforcement is inconsistent
• Reporting: Required to report foreign assets >IDR 1 billion in tax returns

The tax disadvantage is real but manageable, especially for growth-focused ETFs with low dividend yields (e.g., VTI yields ~1.5% vs. IHSG ~2-3%).

Common Objections Addressed

“Exchange rates fluctuate—I might lose money on currency conversion”

• True, but this is precisely WHY you diversify. If Rupiah weakens, your USD assets protect you. If Rupiah strengthens, your IHSG holdings benefit. You can’t predict which, so hold both.

“US market valuations are expensive right now”

• Timing the market is a fool’s errand. Use dollar-cost averaging (DCA) to enter gradually. Besides, IHSG P/E ratios aren’t particularly cheap either historically.

“What if the US market crashes?”

• It will—eventually. All markets crash. The question is: would you rather have one egg basket (IHSG) or two (IHSG + SPX)? Two baskets reduce risk even if both can break.

“I don’t have enough money to diversify”

• False. With fractional shares on Gotrade, you can buy USD 10 of VOO. Even with a IDR 10 million portfolio, you can allocate IDR 7M to IHSG and IDR 3M to global stocks.

Related Articles

• Portfolio Asset Allocation Strategy
• Currency Risk: Understanding Rupiah vs USD Exposure
• Why Not Just S&P 500? (The Opposite Extreme)
• How to Reduce Investment Risk Through Diversification
• Investing in US Stocks from Indonesia: Complete Guide