South Korea's consumer inflation accelerated to a 26-month high in May, exceeding forecasts and strengthening the case for the Bank of Korea to begin tightening policy in the coming months.
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South Korea inflation hits 26-month high of 3.1% on oil costs
South Korea's consumer inflation accelerated to a 26-month high in May, exceeding forecasts and strengthening the case for the Bank of Korea to begin tightening policy in the coming months.
The consumer price index rose 3.1% from a year earlier, the fastest pace since March 2024, the Ministry of Data and Statistics said Monday. The reading topped the 3.0% median estimate in a Reuters poll and accelerated from April's 2.6% gain.
"Today's data confirms that inflation is no longer a transitory concern — it's becoming embedded through imported energy costs and currency depreciation," said Park Sang-hyun, chief economist at HI Investment & Securities. "The BOK's window for action is narrowing."
Petroleum product prices surged 24.2% from a year earlier, reflecting elevated global crude costs amid Middle East tensions and the won's persistent weakness against the US dollar. Core inflation, which strips out volatile food and energy items, quickened to 2.5% from 2.2% in April — the fastest since February 2024. On a monthly basis, the CPI rose 0.5%, matching the prior month's pace but exceeding the 0.3% increase economists had expected.
The acceleration puts the BOK's 2% medium-term target further out of reach. The central bank, which last week signalled an imminent shift toward a more restrictive policy stance, forecasts consumer prices to average 2.7% this year. Markets now price a growing probability of a rate increase at the BOK's next meeting, a move that would strengthen the won in the near term but risk weighing on domestic consumption and equity valuations.
The data marks the third consecutive month of accelerating inflation, with the headline reading climbing from 2.1% in March to 2.6% in April and now 3.1% in May. The trend mirrors broader Asian price pressures as elevated global energy costs and weakening regional currencies compound domestic demand-side factors.
The won has depreciated roughly 8% against the US dollar over the past 12 months, amplifying the cost of dollar-denominated energy imports. South Korea, a net importer of crude oil and natural gas, is particularly exposed to this dynamic. The last time the won traded at current levels against the greenback, in late 2022, headline CPI was running above 5%.
For the BOK, the challenge is balancing inflation control against growth support. The economy expanded 1.3% in the first quarter from the prior period, but private consumption remains subdued and the export-dependent manufacturing sector faces headwinds from slowing global demand. A rate increase would mark the BOK's first tightening move since early 2023, when it ended a cycle that brought the benchmark rate to 3.50%.
The next BOK monetary policy meeting is scheduled for July. Overnight index swaps currently imply roughly a 60% probability of a 25-basis-point hike, according to data compiled by Bloomberg.
This article is for informational purposes only and does not constitute investment advice.
