Core inflation at 2.8% remains above target, with transport prices rising 7.7% as the main driver; semiconductor exports surged 263% to $60.3 billion, pushing full-year tax revenue to an estimated record jump of 28%.

Strong exports give the central bank room to raise rates without hurting growth — economists expect a pause in October followed by a resumption of hikes in November, with the benchmark rate potentially rising to 3.25%.

South Korea's headline inflation eased as expected in September, but core inflation excluding food and energy remained sticky, and semiconductor-driven exports hit a record monthly high, reinforcing market expectations that the Bank of Korea will resume rate hikes in November.

On Friday (October 2), data released by Statistics Korea showed that the September consumer price index rose 2.9% year-on-year, down from 3.1% in August and in line with economists' median estimate of 2.9%; core inflation came in at 2.8%, down notably from 3.4% in August but still running in the middle-to-upper part of the 2% range, indicating that underlying price pressures have not faded in step with falling energy costs.

Meanwhile, trade data released the same day showed that September exports more than doubled year-on-year to $120.9 billion, a record high; semiconductor exports surged 263% to $60.3 billion, also setting a record.

Analysts say this combination gives the Bank of Korea room to keep raising rates without hurting growth. Several economists expect the central bank to pause at its October meeting to assess the impact of two consecutive hikes, then resume raising rates in November.

Inflation stickiness: transport prices lead the way

Although headline inflation has fallen below 3%, structural price pressures remain. Jeeho Yoon, an economist at BNP Paribas, said core inflation is still running in the middle-to-upper part of the 2% range, making it difficult for the central bank to ease its guard.

By component, transport prices rose 7.7% year-on-year, the main force driving inflation; recreation and culture prices rose 5.8%, restaurants and accommodation rose 2.8%, and household goods and services rose 3%.

According to Yoon's analysis, high oil prices have pushed up costs for airfares, car repairs and package tours, while rising semiconductor prices are being passed through to electronics such as computers; demand-side pressures also exist, with restaurant prices up 2.5% year-on-year, and the pass-through effect of future wage growth is another variable that needs close watching.

The Bank of Korea expects CPI to rise 2.7% this year and 2.3% in 2027, with core inflation holding at 2.5% in both years — still above the 2% target, meaning there is little room for policy rate cuts in the near term.

Record exports: semiconductor boom underpins the economy

September exports more than doubled year-on-year to $120.9 billion, setting a record high despite fewer working days that month; semiconductor exports surged 263% to $60.3 billion, also a record.

This export structure confirms the earlier judgment of Bank of Korea Governor Shin Hyun-song — that South Korea's growth model is shifting from consumer electronics-driven to AI infrastructure-driven, with the benefits of semiconductor industry expansion flowing through corporate earnings, consumption and investment into the broader economy.

The strength of the chip cycle is also spilling over into the fiscal side. Driven by semiconductor profits, special dividends from chip companies, a stronger stock market and recovering private consumption, South Korea's full-year tax revenue this year is expected to jump 28% year-on-year to a record 478.6 trillion won (about $352 billion).

This also means that even if the central bank tightens monetary policy further, the underlying economy still has enough resilience to absorb the shock of higher rates, providing practical support for raising rates without harming growth.

Rate path: pause in October, resume in November

The Bank of Korea raised rates twice in a row in July and August, lifting the benchmark rate to 3%. Policymakers have repeatedly warned that strong growth, persistent inflation and rising home prices may require further increases in borrowing costs.

The median of the six-month rate forecasts published in August was 3.25%, implying room for one more hike. Governor Shin said at the time that this figure pointed to a gradual pace of tightening.

Economist Hyosung Kwon noted that with inflation staying sticky and surging exports supporting growth, the Bank of Korea needs to raise rates further, and is expected to pause in October after two consecutive hikes to manage the pace of tightening, then resume in November.

Next, the market will focus on the October central bank meeting and subsequent inflation and export data for further guidance on the timing of rate hikes.