Oil Shock Sends Asian Currencies to Record Lows in June 2026

Geopolitical uncertainty keeps risk premiums high

Stalled negotiations between the US and Iran are sustaining a geopolitical risk premium across currency markets. As BNP Paribas Wealth Management described it in early June, the FX market remains in a “delicate balance,” shaped by geopolitical developments and shifting economic expectations, with sentiment swinging between escalation and de-escalation risks . Asian currencies traded in narrow but pressured ranges in the first week of June as investors watched whether a temporary truce could be extended and shipping routes reopened . The Malaysian ringgit, for instance, ended lower against the dollar on June 5, weighed down specifically by the US-Iran negotiation stalemate and rising fuel prices .

Which Currencies Are Getting Hit the Hardest?

The pain is concentrated among Asia’s large net oil importers. OCBC strategists noted that the South Korean won, Philippine peso, and Thai baht were coming under significantly more pressure than the Chinese renminbi, which has been relatively resilient . MUFG’s analysis had already identified the peso, won, and baht as the most vulnerable Asian currencies to further oil price spikes, with the Indian rupee close behind .

The inflation sensitivity varies sharply. MUFG estimates that for every $10 per barrel increase in oil, Asia’s CPI rises by 0.1 to 0.8 percentage points. Thailand is the most sensitive (+0.8pp), followed by Vietnam and the Philippines (+0.6pp). Indonesia and Malaysia are at the low end (+0.1pp), likely reflecting government fuel subsidies that limit the pass-through to retail prices .

Central Banks Abandon Rate Cuts, Shift to Hawkish Holds and Hikes

The policy response across the region has been unambiguous: rate cuts are completely off the table, and several central banks are actively tightening or signaling they will do so soon.

The Reserve Bank of India held its repo rate steady at 5.25% in its June 2026 review, explicitly flagging risks from elevated crude prices, supply-chain disruptions, and a sub-normal monsoon, while leaving the door open for future tightening .
South Korea’s consumer inflation accelerated to its fastest pace in more than two years, with core CPI hitting 2.5%, reinforcing the Bank of Korea’s hawkish tilt toward higher rates . Reports indicate South Korea may follow with a rate hike as soon as July .
Japan’s central bank looks set to raise its policy rate to 1.0% from 0.75% at its June 16 meeting, as the twin forces of an energy crunch and an AI investment boom keep inflation elevated . Indonesia and Sri Lanka have already delivered large rate hikes, while the Reserve Bank of Australia has raised rates three times this year .

The shift from dovish to hawkish expectations began earlier in 2026. By March, overnight index swaps showed traders pricing in rate hikes rather than cuts across developing Asia, with the most dramatic turnaround visible for India and the Philippines .

A Small Patch of Relief in Southeast Asia

The picture is not entirely uniform. Inflation data released in early June for the Philippines and Thailand came in below market expectations, giving those two central banks “a bit more breathing room before needing to raise interest rates,” though inflation remains far above pre-war levels . This modest relief has not changed the broader trajectory, but it may slow the pace of tightening in those two economies for now.

What is clear across the region as of mid-June 2026 is that the era of rate cuts has ended. From Mumbai to Seoul and Jakarta to Tokyo, the dominant stance is cautious tightening or a hawkish hold, with the risk of further rate hikes alive as long as oil stays elevated and the Strait of Hormuz remains a geopolitical flashpoint.