South Korea's 83.5% export surge sits beside falling retail sales and rising core inflation

The 83.5% is a ratio, so it helps to convert it to dollars. A record $120.9 billion ^[1] at that growth rate implies about $65.9 billion a year earlier ^[20] and a gain of roughly $55.0 billion ^[21]. Yonhap reported that semiconductor exports topped $60 billion for the first time ^[2], at least 49.6% of the month's total ^[22].

Now apply the 304.9% daily-average gain in chip exports, which KDI's report gives as summarised by sedaily.com ^[14], to that $60 billion floor. The year-ago base comes out near $14.8 billion ^[24], and chips would then account for about 82% of the $55 billion increase ^[25]. The figure is loose: the 304.9% is a daily-average rate, the $60 billion is a floor, and the two are measured on different bases.

Capital spending has the same skew. It rose 16.1% in August while investment in chip-making equipment rose 107.7% ^[3]. A total is a weighted average of its parts, so everything outside chip equipment grew by less than 16.1% ^[23]. KDI described capital spending as broadly firm, with investment in other machinery expanding ^[4]. The published account does not say how large chip equipment is within the total.

Household data run the other way. Passenger car sales fell 19.2% and lodging and restaurant output fell 2.8% ^[6][7]. "With the effects of the recovery failing to spread across households, the improvement in consumption remains modest," KDI said ^[9].

Prices are the second constraint. Dubai crude averaged $113.7 a barrel in September against $88.8 in August ^[10]. Headline consumer inflation eased to 2.9% from 3.1%, but that largely reflected a fading base effect in telecommunications costs ^[11].

We think the recovery is a bet on one product, or rather, on one product's order cycle: chips are carrying the exports, the equipment spending and most of the dollar gain, while household spending moves the other way. The counter-thesis sits in the same report. All-industry output grew 1.9% in August, slower than July's 3.1% ^[16], yet services output growth accelerated to 4.6% from 3.4% ^[17] and KDI said the weakness in manufacturing employment is easing somewhat ^[18]. Those are either early breadth or noise, and one month cannot separate them.

We would call the thesis wrong if retail and car sales turn positive while chip exports slow, or if non-chip exports grow fast enough to pull chips' share of the gain well below the 82% estimated above. KDI itself listed rising energy prices and inflation concerns stemming from heightened Middle East tensions among the downside risks to growth ^[15].