Today's BOP data show that after selling more than USD30bn of domestic equities in June, foreigners purchased USD6bn in July. That swing goes a long way to explain the sudden appreciation of the KRW. That should be able to continue, given CA surplus of over 20% of GDP, strong economy, and BOK hikes.

I thought the underlying data in today's CPI release were firm. Despite an easing in travel expenses, core inflation (excluding mobile phone bills) remained at 2.8% YoY, the trimmed mean rose, and the diffusion across all items ticked up.

Output in July retained the gains of June, and capex spending rose further. Both suggest a strong start for GDP in Q3. Retail sales were weaker last month, but the household sector should start to benefit as the government spends the 20% growth in tax revenue of recent months.

Today's BOK meeting didn't throw up any big surprises: core CPI and growth forecasts were raised against the backdrop of the TOT shock, and the bank hiked again with the aim of being "pre-emptive". However, Governor Shin's remarks at the press conference produced a lot to digest.

Back-to-back rate hikes aren't common, and since July, stronger KRW and lower equities have tightened FCI. However, the economic backdrop is unusually strong, so I would still expect the BOK to hike at its August meeting. That said, rather than rates, it is the KRW that looks more interesting here.

The big macro dynamic is the sharp rise in chip prices that is boosting the terms of trade, and thereby lifting nominal GDP and national income. Today's July export and import price data show that these trends remain in place. Rates have priced at least the first stage of this. The KRW still hasn't.

The BOK this week published a nice report on spillovers from the terms of trade boom. It wouldn't be fair to say that this pays only lip service to the usual concerns on why spillovers might be limited. But the report's central expectation is that the impact will be "both sizable and persistent"

The BOK expects core inflation to be pushed up by the chip boom, via both cost-push for electronic devices and demand-pull from the big boost to national incomes. In today's July data, the cost-push element is more obvious, though there are some tentative signs of demand-pull appearing.

But output growth and capex were strong in June. Output was lifted by both goods and services, while the tech sector gave a boost to capex. Retail sales and construction orders were weak, but overall, the data signal a bit of upside risk for the next release of Q2 GDP data in September.