The rise in inflation is mainly about energy. But that headline inflation is now above 3% YoY – and private services over 4% – also reflects two other drivers: a high starting point, and the rise in chip prices that via cost-push is showing up in the CPI in higher prices for electronic devices.

Two of the key issues for the economy are whether the chip boom trickles down, and what damage the Iran war will cause. April data show a bit of both. ICT capex rose for the third month, and there were more signs of a floor in the labour market. Overall output fell, but remained above the Q1 average

The BOK didn't change rates today, but signalled that despite continued uncertainty, higher rates are coming. The pace will depend on dynamics in the energy and chip markets. I would also be watching for how core CPI performs against the BOK's modest forecast of 2.4%

The BOK's main considerations for policy are growth, inflation, KRW and housing. Three were already pointing to hikes, and tomorrow the bank is likely to raise expected growth above potential too. That makes a rate hike likely. The risk is it still just a bit too early.

Data today for Japan and Korea show the inflationary impact of the War, with import prices in both economies rising at double-digit rates. However, such rises have been seen before. By contrast, export price inflation is setting records, offsetting the hit from energy prices to domestic growth.

March data offer more evidence that the KRW just can't get a break. Finally, retail outflows into foreign assets eased, only to be replaced by huge domestic selling by overseas investors. That has normalised in April, so perhaps investors are realising that a CA surplus of 20%+ of GDP should matter

The BOK's current forecast assumes no GDP growth in the rest of the year, and contracting exports. But export growth still looks to be picking up, capex indicators are improving, and there is a tailwind from growth in real Gross Domestic Income in Q1 being faster than any time since the 1990s.

Dearer oil boosted pump prices and so headline CPI in April, but also airline fares and so services inflation. That is another reason to think that personal services inflation of near 4% YoY isn't a true reflection of underlying prices. But it will still matter for the BOK if the chip cycle holds up

My latest video, discussing two of the issues that puzzle me about Korea: the weakness of the KRW despite surging export growth, and the strength of inflation despite GDP growth – until today – being well below potential.

Today's consumer confidence survey warns of higher inflation but slower growth. That is the BOK's base case, and if growth does slow, then there is a reason to look through inflation. But today's Q1 GDP data show much higher growth, boosted by a semi cycle that isn't yet ending.

Yesterday's loan officer survey and today's PPI print both warn about inflation risks. However, in PPI, it is only goods prices that offer clarity. Services PPI has risen too, but seems to suffer from the sort of distortions that are making trends in CPI services inflation difficult to interpret.

Energy import prices surged 50% in March, and that will undoubtedly raise inflation. However, Korea's terms of trade actually continued to rise (just about), helped by the continued sharp rise in chip export prices. For Korean growth, there is an offset to this energy crisis.

Trade data for the first 10 days are volatile. But the April data are still worth highlighting. They show strong exports and a rising trade surplus, which offers a contrast with the BOK's concerns about the cycle, and the market's worries about the KRW.

For me, the tone of today's BOK meeting was a surprising mix of uncertainty and conviction. On the one hand, the bank stressed that the outlook is unclear, depending on events in the Middle East. On the other, it seems very sure that inflation will be quite a lot higher than 2%, and growth lower.

GDP growth has been below the BOK's estimate of potential almost continually since 2022. And yet core inflation hasn't dropped below target, and private services inflation – a proxy for domestically generated inflation – has picked up to above 3%. Just what is going on?