The rally in emerging market currencies and equities hit the brakes on September 8 as Brent crude crept toward the psychologically loaded $100-per-barrel mark. Oil traded in a range between $97 and $99, reaching six-week highs and reminding investors that geopolitics still has veto power over market momentum.
The MSCI EM currency index slipped 0.1%, snapping a four-day winning streak.
The oil factor
The proximate cause of crude’s surge is the escalating US-Iran conflict. Strikes on Iranian tankers and Saudi energy infrastructure have rattled global supply chains, with threats of “economic warfare” adding a rhetorical accelerant to an already volatile situation.
The Strait of Hormuz, through which roughly a fifth of the world’s oil supply passes on any given day, sits at the center of the anxiety. Fears over shipping safety through that chokepoint have pushed prices higher and kept them there.
Analysts are now projecting that supply disruptions could persist well into 2027.
Domestically in the US, the pressure is visible at the pump. Gasoline prices hit record highs above $4 per gallon over the Labor Day weekend, stoking inflation concerns that ripple outward into global monetary policy expectations.
Who gets hurt, who benefits
The pain distribution from an oil price spike is never even, and that unevenness was on full display. Hungary and India, both heavy oil importers, were among the weakest performers in the EM currency space on September 8.
The mechanics are straightforward. Oil-importing nations pay more for energy in dollars, which widens their current account deficits. Wider deficits put downward pressure on local currencies. Weaker currencies make imports more expensive across the board, feeding inflation.
India’s central bank and Bank Indonesia have both intervened in currency markets this year to stabilize their respective units.
On the other side of the ledger, oil-exporting emerging markets and commodity-linked currencies tend to benefit from higher crude prices. Countries like Nigeria, Saudi Arabia, and Brazil see improved fiscal balances when oil revenues climb.
A pattern that defined 2026
This isn’t an isolated event. The dynamic of rising oil prices pressuring oil-importing EMs while boosting exporters has been a defining theme throughout 2026. Every major escalation in Middle Eastern tensions this year has produced a similar market response: a brief rally in EM assets gets interrupted by energy price anxiety, followed by a rotation toward commodity exporters and safe-haven assets.
What to watch from here
Central bank responses will be critical. If the Reserve Bank of India or Bank Indonesia signal further tightening in response to currency weakness and imported inflation, it could dampen the growth outlook for two of the largest emerging economies.
With analysts warning of disruptions extending into 2027, investors are increasingly pricing in a “higher for longer” oil scenario rather than a temporary spike.
