Economy in Brief

In this week's Letter, we examine the divergences running through Asia's inflation, monetary policy and currency performance. Headline CPI inflation has risen across much of the region, driven in large part by the closure of the Strait of Hormuz. Underlying dynamics nonetheless remain disparate, with China recording the region's lowest inflation rates and India facing renewed food and oil pressures (chart 1). China warrants closer attention still, since its producer price inflation now runs far ahead of consumer inflation (chart 2). Weak passthrough to domestic prices, soft demand and Beijing's campaign against destructive price competition all help explain that gap. Disparate inflation outcomes, in turn, are feeding divergent monetary policy stances, though that divergence has narrowed somewhat (chart 3). India has paused its rate cuts, while the Bank of Japan continues its gradual normalisation. Japan also sits at the centre of a protracted rise in yields, shared with its major-economy peers. A decomposition suggests real yields, rather than breakevens, have been the greater driver, amid concerns about fiscal policy and capex (chart 4). Divergence runs through currency performance too, with relative standings shifting repeatedly on a trade-weighted basis (chart 5). The Indian rupee has been the worst performer year-to-date, only recently ceding that position to the Philippine peso. At the other end of the table, the Chinese yuan has been dethroned by a resurgent South Korean won. Strong AI-driven export inflows had long been offset there by persistent portfolio outflows.

Inflation divergence Headline CPI inflation has risen across much of Asia this year, on many measures. Surging energy prices, driven by the continued closure of the Strait of Hormuz, account for a large part of that rise. Underlying inflation dynamics within the region, however, remain quite disparate from one economy to the next. External forces such as oil prices and supply shocks are only part of the story. Domestic conditions matter too, notably the strength of domestic demand and each economy's dependence on imported goods, which is another way of describing its degree of self-sufficiency. China illustrates the point, with inflation still short of breaking conclusively above the low to no inflation region. That owes arguably in part to domestic demand conditions, which remain comparatively weak. It has once again logged the region's lowest inflation rates in recent months, reclaiming that spot from Thailand (chart 1). India sits at the other end, having ceded the top spot for headline CPI inflation to the likes of Vietnam and the Philippines since early 2025. Its recent resurgence in consumer inflation nonetheless points to a dependence on imported oil. Fresh risks have also emerged more recently from food and agricultural shocks, tied to ongoing and possibly worsening El Niño effects.

One thing is clear: it is not a deflationary world Japan's PPI headline cooled in August, rising by only 0.1%. However, the headline for the all-manufacturing PPI rose by 0.3%, indicating more pressure.

Sequential inflation pressures for Japan’s overall PPI show a 7.6% gain over 12 months, accelerating to 12.7% at an annual rate over six months, and calming to a still-hot 4.5% over three months. For all-manufacturing, the 12-month gain is 7.7%, the six-month pace annualized is 12.4%, and the three-month pace annualized is 4.6%. These sequential results are very similar for these two series. Despite a substantial deceleration in place from 12 months to three months, the three-month pace is still hot, and the pace of the last two months is still at a troublesome 5% to 5.5%.

Japanese PPI data are available ahead of the CPI data. In the shaded columns of the table, we can compare PPI trends in the EMU and the U.S. through July, as well as Japan's own CPI trends.

These lagged comparisons show that PPI inflation in the European Monetary Union, while excessive over 12 months and six months, somewhat like Japan, has shown a sharper deceleration over three months. In the U.S., finished goods PPI inflation shows somewhat more tempered overall performance compared to Japan, but the just-released August data have turned hot again. The global PPI picture is not reassuring.

However, Japan's CPI, which is the more important reading for central bank attention, shows inflation at 2% over 12 months, rising to a 3% pace over six months and to a 4.4% annualized rate over three months. Japan’s core inflation similarly registers as an expansion of about 1.5% over six months and 12 months but logs a 2.8% increase over three months. Inflation remains restless.

Brent oil prices declined in August, but in spot markets oil is back over $100 a barrel, so it's not clear that we should view August, or the three-month trends, as good news. The Strait of Hormuz continues to be adversely affected. While some oil is getting out, clearly not enough is in circulation to calm world oil markets. In addition, there's a lot of concern about what's going to happen to LNG supplies as winter approaches and LNG is used for heating fuels, particularly in Europe.

Quarter-to-date inflation shows hot numbers for Japan's overall PPI and all of manufacturing. Running at a pace of about 6% in the quarter, there's not much that's reassuring despite the fact that there is a step-down of inflation in August. And will the August ‘print’ even be sustained?

The right-hand column shows the correlation between the price measures in the stub of the table at the left and oil prices. Japan's PPI has positive correlations of about 0.4 with Brent; the European Monetary Union has a PPI correlation of about 0.55. In the U.S., the PPI finished goods index has a correlation of about 0.4. However, in Japan, the CPI has a negative correlation of about -0.2 to -0.4.

On the day that the European Central Bank met and decided to raise interest rates by 25 basis points, the German inflation report for August firmed, showing that headline inflation rose 0.3% on the month, with the core rising by 0.1%. Year-over-year headline inflation in Germany is excessive at 3%. However, the core rate at only 2.3% is not that far above the ECB target for all of the monetary union, a pace of 2%. German inflation for the headline is 3.6% over six months and 3.7% over three months; however, over three months and six months, German core inflation is running at 2%, the ECB’s chosen speed for inflation for the union as a whole.

German core inflation provides a counterpoint to headline inflation. It enables a strong argument that energy price inflation has not spread throughout the monetary union. However, with the ECB raising rates, German bond yields have risen to a 17-year high and the ECB seems determined to treat energy price inflation as something important and significant that it needs to fend off.

Economic conditions still show growth in the monetary union as weak at 1.0%. Growth among the top four economies is 1.1% with growth for the rest of the union year-over-year at 0.5%. So, the ECB is raising interest rates in an environment where growth is modest-to-low and where headline inflation is surging but where core inflation is much better behaved. The pace for Germany at 2% over three months and six months is right on target; 2.3% over 12 months is slightly excessive. For the entire euro area, the core inflation rate is closer to 2.5%, which is uncomfortable but not a terrible overshoot, certainly not with energy prices having flared the way they have.

Diffusion statistics show that inflation over three months in Germany has accelerated in only 27.3% of the categories; however, inflation has accelerated in 72.7% of the categories over six months and in 63.6% of the categories over 12 months. The tempered three-month inflation rate breadth does not dominate the other two metrics; however, it provides another counterpoint to the notion that inflation from oil price increases is spreading.