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Oil above $90 and rising yields hit Southeast Asian stocks

Oil above $90 and rising yields hit Southeast Asian stocks
Markets · 2026
Photo · Marcus Devlin for Daily Digest Invest
By Marcus Devlin Equities Correspondent Sep 1, 2026 4 min read

Southeast Asian stock markets ended lower on [day], with Singapore and Malaysia leading the declines, as escalating Middle East tensions pushed oil prices above $90 a barrel and sparked a selloff in global government bonds. The combination of higher crude and higher bond yields weighed on emerging-market assets, drawing money away from riskier markets.

What's driving the selloff?

The immediate trigger was a fresh spike in oil prices, with Brent crude climbing above $90 for the first time in months. The move followed renewed geopolitical friction in the Middle East, a region that accounts for a large share of global oil output. Traders worry that any disruption to supply could tighten an already balanced market.

At the same time, government bond yields in major developed markets—especially U.S. Treasuries—rose to fresh highs. Yields move inversely to bond prices, so a rise means investors are selling bonds. That often happens when investors expect higher inflation or stronger growth, but in this case it was also driven by a flight from risk as tensions escalated.

For emerging markets, the combination is particularly uncomfortable. Higher oil prices can worsen inflation and widen trade deficits for countries that import most of their energy, which includes many Southeast Asian nations. Meanwhile, rising yields on "safe" assets like U.S. Treasuries make them more competitive against riskier stocks and bonds elsewhere, prompting global investors to pull money out of emerging markets.

Why Singapore and Malaysia were hit hardest

Singapore's stock market is heavily weighted toward financial and industrial companies, which tend to be sensitive to global growth and interest-rate expectations. Malaysia, as a net oil importer despite being a regional producer, faces direct pressure from costlier crude. Both markets also have relatively high foreign participation, making them more exposed to shifts in global investor sentiment.

The declines in Southeast Asia were part of a broader regional trend. Other Asian markets also struggled, though the losses were most pronounced in the two countries. The moves echoed similar weakness in other parts of the world, including UAE stocks and Swiss stocks, as investors grappled with the same geopolitical and macro forces.

What it means for investors

For everyday investors, the key takeaway is that oil and bond yields are two forces that can move markets in tandem. When both rise, emerging-market equities often come under pressure because they are seen as riskier and more vulnerable to inflation and higher borrowing costs.

Higher oil prices can feed into consumer prices, potentially prompting central banks to keep interest rates higher for longer. That can slow economic growth and squeeze corporate profits. For investors holding Southeast Asian stocks, this means volatility could persist as long as tensions remain elevated.

It's also worth noting that not all sectors are affected equally. Energy producers and related companies often benefit from higher crude prices, while airlines, manufacturers, and other heavy fuel users tend to suffer. In the current environment, energy stocks have rallied in many markets, even as broader indices fell.

What to watch next

Investors will be closely monitoring developments in the Middle East, particularly any signs of further escalation that could push oil even higher. Also on the radar are upcoming economic data releases, including the U.S. jobs report, which could influence the Federal Reserve's interest-rate path. A stronger-than-expected report might reinforce expectations of higher-for-longer rates, adding more pressure on emerging markets.

In the meantime, the rise in oil and bond yields is a reminder of how interconnected global markets are. A geopolitical event in one region can quickly ripple through stock markets, bond markets, and currencies across the world.

For those with diversified portfolios, the current turbulence underscores the value of spreading investments across different asset classes and regions. While emerging-market stocks may be volatile, they also offer long-term growth potential. As always, it's important to focus on your own investment horizon and risk tolerance rather than reacting to short-term market moves.

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