Three signals for the Korean memory cycle, and one that does not work

Of the three series normally used to place the Korean memory cycle, one is at a record, one has been flat for five months and one does not work. Export unit value reached $19,479 per kilogram in July 2026 against $7,230 a year earlier. Equipment imports peaked at $2.93bn in March and stood at $2.54bn in July. Memory share prices fell hard over the summer, but 93.9 per cent of that movement was the index they sit in, which leaves them no room to say anything about memory.

93.9 per cent was the index, and six per cent was everything else

The third signal is worth disposing of first, because it is the one most often quoted and the only one that can be tested directly. Between 8 July and 26 August 2026, SK Hynix fell 39.5 per cent from peak to trough and Samsung Electronics 27.4 per cent, while export data was setting records. A regression of daily returns on the KOSPI returns an R-squared of 93.9 per cent for SK Hynix and 94.3 per cent for Samsung, and all three lows fell on the same trading day. The detail is in the summer share-price record.

What that leaves for every memory-specific cause combined is roughly six per cent of the variance. A signal that is 94 per cent something else is not a signal about memory, and for this window it is set aside rather than weighed.

Source: Korea Customs Service, Financial Services Commission. Own calculation.

The two that remain disagree

Unit value is the strongest reading on the panel. A kilogram of exported Korean integrated circuits fetched $19,479 in July 2026 against $7,230 a year earlier, while export tonnage fell 1.2 per cent, so the revenue arrived through price rather than volume; the unit-value reading sets out the series. Only one month in thirteen fell, and five consecutive records close the sample.

Equipment imports say something different. They rose 55.4 per cent over the year but peaked at $2.93bn in March 2026 and have drifted 13.3 per cent lower since, even as exports rose 31.4 per cent over the same five months. As a share of export value, equipment has fallen from 13.3 per cent to 7.8 per cent, examined in the equipment reading. Producers earning record revenue are not converting it into tools at anything like the earlier rate.

A rising price with flat capacity spending is the configuration that late-cycle accounts predict, and it is also the configuration a delivery gap produces. Thirteen months of data cannot separate them, and this article does not pretend otherwise.

The export line itself has wobbled

One more figure belongs on the panel. Chip exports fell 2.5 per cent in July 2026, from $33.56bn to $32.72bn. That is the third month-on-month decline in the thirteen, after 3.3 per cent in October 2025 and 1.9 per cent in January 2026. Both of those were followed by resumed growth, the second by a 28 per cent month.

The sample therefore contains no example of a decline that meant anything, which is exactly why a single down month is not evidence and why the count matters more than the size.

What to watch

Two consecutive monthly declines in export value. That has not occurred once in the sample, so it would be the first genuinely new observation rather than a repetition of a pattern already seen three times.

Alongside it, whether equipment imports break back above $2.93bn or extend the plateau past eight months, and whether the share-price regression loosens once the market stops moving as one. A quarter in which memory shares trade on their own news again would restore a third instrument to a panel that currently has two.