Gold crossed $3,000 an ounce. US-China tariff rhetoric turned from background noise into actual policy. And I sat watching my Hang Seng heavy portfolio sink 8% in three weeks.
That was when I stopped treating "diversification" as something I would get around to eventually.
Why Hong Kong Portfolios Are Structurally Vulnerable
Most retail investors in Hong Kong do not think about this until it hurts: the HKD is pegged to the USD at 7.75–7.85. When you hold HK-listed stocks denominated in HKD, you are implicitly holding USD exposure through the peg. Add US-listed ETFs on top, and your entire portfolio moves with one currency.
When tariff fears hit in early 2026, the Hang Seng dropped while the USD weakened simultaneously. My portfolio took a double hit — equity prices fell AND the currency I was denominated in lost value relative to other safe havens like gold and yen.
Two years of running a concentrated HK equity portfolio had produced decent returns when things went well. The problem was that when things went badly, everything dropped together. No counterweight, no shock absorber.
What I Actually Bought
Nothing exotic. I moved roughly 40% across four categories over one week:
Gold ETF (2840.HK) — 15% of the portfolio. The SPDR Gold ETF is the most liquid gold product on HKEX. Expense ratio of 0.40% is not cheap, but bid-ask spreads are tight for buy-and-hold. I used the HKD counter (9840.HK) to avoid currency conversion fees on each trade.
Short-duration US Treasury ETF — 10%. Yields were sitting around 4.5%, which meant I earned something while waiting. Duration risk was low enough that rate movements barely moved the NAV. Think of this as a parking lot for money that pays decent rent.
Japanese yen exposure — 5%. Not through forex trading — through a JPY money market fund. The yen had already strengthened when I entered, so I was partially late. The structural argument (Japan rate normalization, carry trade unwinding) still had legs, but buying after a move always means accepting you missed the first portion.
Hong Kong virtual bank deposits — 10%. ZA Bank at 4.28% on HKD deposits up to $500K. Mox around 3.8%. Not glamorous, but genuinely risk-free under Hong Kong's deposit protection scheme (up to HK$800K per bank). This was the "sleep at night" allocation.
Six Weeks Later: The Numbers
Gold did its job. During the period where HSI was down 11%, my gold ETF was up about 6%. Not a perfect hedge — gold does not short your portfolio — but a genuine counterweight. When everything else in the portfolio was red, gold was green. That psychological effect matters more than most people admit.
Treasuries earned their yield and barely moved. Boring is the point. When I looked at this allocation during market panic, the price was essentially flat and the coupon kept accruing. Exactly what I wanted.
The yen position was mixed. It appreciated another 3% after I entered, then gave back half on a Bank of Japan communication that markets interpreted as dovish. Currency positions on short timeframes are noisy. I still think the structural case is sound, but the volatility reminded me why I kept this to only 5%.
Virtual bank deposits worked perfectly. Fixed rate, zero drama, 4.28% annualized. No decisions to make, no market to watch.
What I Gave Up
I need to be honest about the cost. When the market bounced in March — Hang Seng rallied 9% in two weeks — my safe haven allocation dragged returns. If I had stayed 100% in equities, I would have captured all of that bounce. Instead I captured about 55%, because 40% of my money was in assets that do not participate in equity rallies.
Gold pays zero dividends. Every month I hold it, I forgo 3-5% yield from HK blue chip dividend stocks.
The virtual bank rates are promotional. When they normalize to 2-3%, the opportunity cost of holding cash becomes real.
The total cost of my "insurance" over six weeks: approximately 4% underperformance versus a fully invested equity portfolio. Whether that was worth avoiding the 8% drawdown in February depends entirely on your risk tolerance and time horizon.
What I Would Do Differently
I moved too much, too fast. A 40% shift in one week is reactive, not strategic. If I could redo it, I would build the allocation gradually over 2-3 months — buying gold on pullbacks, scaling into deposits as rates appeared.
I also wish I had started the gold position six months earlier at $2,400/oz instead of buying above $2,900. Paying up for insurance after the fire has started is still better than having no insurance, but the premium is higher.
The Framework I Settled On
After six weeks living with this allocation, here is what I use now:
- 60-70% growth (equities, ETFs, selective positions)
- 10-15% gold (via HKEX ETF, not physical)
- 5-10% fixed income or high-yield deposits
- 5-10% cash for opportunistic buying
The specific percentages matter less than the principle: do not build a portfolio where every position moves in the same direction at the same time. Hong Kong's market structure — the USD peg, the China macro exposure, the rate sensitivity — makes diversification into uncorrelated assets more important than in markets where the currency floats freely.
For Developers Reading This
You might wonder what this has to do with programming. Fair question.
I am a developer who also manages my own investments. The same analytical thinking that helps us debug complex systems applies to portfolio construction. You model the dependencies, identify single points of failure, and build in redundancy. A concentrated equity portfolio is like a monolith with no failover — it works great until it doesn't, and when it fails, everything goes down together.
Most developers I know have 100% of their non-retirement savings in tech stocks or crypto. That is a concentrated bet on one sector in one currency. It is worth spending an afternoon thinking about what happens to your portfolio when the thing you are betting on goes sideways.
Not financial advice — just what I did and what happened. The specifics will be different for everyone. The principle of avoiding correlated risk is universal.
I write about investing from the perspective of someone who builds software for a living and applies systems thinking to financial decisions.
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