Foreign holdings have fallen to historic lows. Is the undervalued state of South Korean semiconductors a trap or an opportunity?

The South Korean memory chip market is facing a rare pricing divergence: the market is pricing in a cyclical peak with extremely pessimistic valuations, while analysts' earnings forecasts continue to be revised upwards. Behind this contradiction lies a deep-seated game between the large-scale withdrawal of foreign capital and the expansion of demand for HBM (Hardware-Based Memory).

According to Goldman Sachs data, foreign holdings in South Korea's KOSPI semiconductor sector have fallen to 49.1%, 2.1 standard deviations below the historical average, and this outflow is almost entirely concentrated in the memory chip sector. Meanwhile, consensus earnings per share (EPS) forecasts for the South Korean technology sector in 2027 have been revised upwards by as much as 122% in the past six months, and the divergence between earnings forecasts and market pricing has reached a level that cannot be ignored.

The core variable in this divergence lies in the demand trend of HBM (High Bandwidth Memory). In September, TrendForce raised its 2027 HBM price outlook and predicted that HBM would absorb 30% of DRAM wafer input in 2027, up from 22% in 2026. If this trend holds, the supply of traditional DRAM may remain tight, and the duration of the memory cycle may far exceed current market expectations.

Foreign investment positions hit extremely low levels, concentrated in the storage sector.

Foreign holdings in South Korea's semiconductor sector exhibit a highly unbalanced structure. According to Goldman Sachs data, foreign holdings in KOSPI Semiconductor are 2.1 standard deviations below the historical average. However, if Samsung Electronics and SK Hynix are excluded, foreign holdings in the remaining constituent stocks are close to normal levels.

This means that the withdrawal of foreign capital is not a complete avoidance of the South Korean technology sector, but rather a precise concentration in the most controversial sub-sector: memory chips. Market concerns about the peak of the memory cycle have been fully reflected in the extreme allocation of positions.

Earnings forecasts continue to be revised upwards, diverging from market pricing.

However, the signals from the earnings side are quite the opposite of market pricing. The consensus EPS forecast for the South Korean technology sector in 2027 has been revised upwards by 8% in the past three months and by a cumulative 122% in the past six months. Although this data covers a broader technology sector rather than just memory chip estimates, its directional signal is undeniable.

The market is pricing in the risk of a cyclical peak, while analysts continue to raise earnings forecasts. This divergence itself constitutes the core tension in the current investment logic for South Korea's semiconductor industry.

A P/E ratio of 4.7: Extremely undervalued or a peak trap?

From a valuation perspective, the South Korean semiconductor sector is currently trading at only 4.7 times forward price-to-earnings ratio, while the historical average is 10.6 times, a shocking discount.

However, this low valuation itself does not constitute a margin of safety. There's an inherent pattern in the memory chip industry: valuations often appear cheapest when earnings are near their peak. If the current valuation is indeed at its earnings peak, the earnings figure in the denominator could decline rapidly. At that point, a P/E ratio of 4.7 would no longer be considered undervalued, but rather a typical peak earnings trap.

The key question is whether we are truly at our profit peak.

HBM expansion may extend the traditional DRAM boom cycle.

The continued expansion of HBM demand provides an important counter-argument to the above issues. TrendForce predicts that HBM will account for 30% of total DRAM wafer investment in 2027, a significant increase from 22% in 2026.

More wafer resources are flowing to HBM production, meaning that the available capacity of traditional DRAM will be squeezed, and the tight supply situation may continue. While the market is worried that the memory cycle has peaked, the expansion of HBM itself may actually be one of the reasons why the traditional memory cycle is being extended.

It's worth noting that industry forecasts support continued pricing power, but they don't necessarily lock in the profit margin trajectory of Samsung or SK Hynix. The growth of HBMs doesn't necessarily mean a reversal in the storage cycle; this logic deserves re-examination.

Whether it's a revaluation or a trap, the key variables lie in contract pricing and supply and demand data.

The current investment logic is not complex. If HBM contract prices remain strong in 2027 and traditional DRAM supply remains tight, the market will have to repric for a longer profit cycle. Given the extremely low level of foreign holdings, this revaluation, once initiated, could unfold in a rather dramatic manner.

Conversely, if supply catches up with demand, the 4.7 P/E ratio will be exposed as a classic example of a peak earnings trap.

The key indicators determining the direction are the trend of HBM contract pricing in 2027, and changes in traditional DRAM spot prices and the profit margins of major manufacturers. Undervaluation itself is not a catalyst; the data is.

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