The Singapore market has a favorite pastime: collecting bank dividends and pretending itâs a âdiversified strategy.â If you open your portfolio today, there is a statistically high probability that DBS, OCBC, and UOB make up the lionâs share of your net worth. On the surface, it looks like a masterstroke. Since 2020, DBS has delivered a total return of roughly 154%, turning a modest 15% position into a 30% monster through sheer organic growth. You didnât necessarily choose to become a concentrated âBanker,â but the market forced the role upon you.
The contrarian truth, however, is that you are currently running a portfolio that would be illegal for a professional US mutual fund manager to operate. While retail investors poured nearly S$4 billion into these three banks in 2025 alone, they are ignoring a fundamental law of physics in finance: concentration works both ways. You think you are diversified because you own âThe Big Three,â but since they all move on the same interest rate and credit cycle drivers, you arenât holding three stocksâyouâre holding one giant, leveraged bet on the MAS and the Fed.
In This Article:
The Masterclass: Portfolio Drift and the 25% Rule
Step 1: The Health Check
Educational Note: Concentration Risk
Educational Note: CET1 Ratio
Iggyâs Insight
Step 2: The Wealth Check
Educational Note: Payout Ratio
Iggyâs Insight
Step 3: The Price Check
Iggyâs Insight
Step 4: The Future Check
The Bottom Line (Strategic Conclusion)
InvestingPro Reality Check
Iggy's VerdictAbout Iggy & the Elite 150
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The Masterclass: Portfolio Drift and the â25% Ruleâ
Before we look at the numbers, we need to understand why the â25% Ruleâ exists. In the professional world, specifically under the US Investment Company Act, a âdiversifiedâ fund is legally barred from putting more than 25% of its assets into a single issuer. This isnât an arbitrary number; it is the point where a single companyâs failure ceases to be a âbad quarterâ and becomes a âterminal eventâ for your wealth.
In Singapore, we have a unique âZero-Tax Edge.â Unlike investors in the US or UK who lose 15% to 24% of their gains to the taxman when they rebalance, a Singaporean investor can trim a winner for a 0% tax hit. This makes the 25% rule even more powerful here. If a stock drifts from 15% to 30% of your portfolio, you can move that capital back to safety without a âtax haircut,â yet most investors refuse to do it because of the endowment effectâthe psychological bias that makes us overvalue what we already own.
đ Educational Note: Concentration Risk
Concentration risk occurs when a portfolio is so heavily weighted toward a single stock, sector, or geographic region that a single negative event can cause disproportionate damage to the total value. While diversification reduces the âunsystematic riskâ (risk specific to one company), concentration amplifies it.
Step 1: The Health Check (Balance Sheet & Net Debt)
Before we can even talk about the mouth-watering dividends, we have to ask: can these banks actually pay their bills if the music stops? For a bank, âhealthâ isnât measured by net debt in the traditional corporate sense (since debt is their raw material), but by their Capital Adequacy Ratio and Solvency. DBS, OCBC, and UOB are currently sitting on âfortressâ balance sheets, but the risk isnât internalâitâs systemic. With the three banks now making up over 52% of the Straits Times Index, the health of your portfolio is now inextricably linked to the health of the Singapore governmentâs regulatory environment.
đ Educational Note: CET1 Ratio
Common Equity Tier 1 (CET1) is a measure of a bankâs core equity capital compared to its total risk-weighted assets. It is the ultimate âemergency fundâ that regulators require banks to hold to survive a financial crisis.
đŚ Iggyâs Insight:
The balance sheets are undeniably strong, but donât let a âPassâ grade fool you into complacency. A CET1 ratio of 15% is a great shield, but it doesnât protect you from a 40% share price correction if the market decides the âBank Tradeâ is over. When one stock is 30% of your portfolio, a 40% drop wipes out 12% of your entire net worth. To recover that, youâd need your remaining 70% to gain nearly 20% just to get back to zero.
Step 2: The Wealth Check (Dividends & Cash Flow)
The narrative in the coffee shops is simple: âBuy DBS, get 5% yield, retire.â But we need to ask if they are paying us from sustainable earnings or if we are entering a âRefundâ phase. Historically, these banks have been incredibly disciplined. However, as net interest margins (NIM) peak and the Fed begins to signal rate cuts in 2026, the âeasy moneyâ for bank earnings is drying up. If the payout ratio climbs too high while earnings stagnate, that dividend isnât a âyieldââitâs a liability.
đ Educational Note: Payout Ratio
The Payout Ratio is the percentage of a companyâs earnings paid out as dividends to shareholders. A ratio above 60-70% for a bank can be a warning sign that they are not retaining enough capital to grow or to buffer against future loan losses.
đŚ Iggyâs Insight:
We are currently in the âsweet spotâ of the cycle, where banks are flush with cash from high-interest rates. But retail investors are piling in nowâat the peak. SGX data shows retail net inflows of S$3.88 billion into banks while the rest of the market saw outflows. This is classic âperformance chasing.â You arenât buying a dividend; you are buying a crowded trade. If NIM compresses by even 20 basis points, the dividend growth story ends, and the âyield pigsâ will be the first to be slaughtered in a sell-off.
Step 3: The Price Check (Valuation & Peers)
At a price of S$59.30, DBS isn't just priced for perfection; it's priced for a miracle. We are now staring at a 2.39x Price-to-Book ratio. Let that sink in. We aren't just at the ceiling; we are on the roof. When we compare our local giants to global peers, the âSingapore Premiumâ becomes obvious. We are paying for the safety of the SGD and the stability of the MAS, but at what point does that premium become a trap?
Next, Iâll show you the exact âline in the sandâ I use to decide whether a 30% bank position gets trimmed nowâor heldâusing the same peer/value logic institutions use
