Materials, parts and equipment rally

Korea's semiconductor sobjang (소재·부품·장비, materials·parts·equipment) stocks have posted sharp gains over roughly three months, an advance strong enough to overtake the performance of Samsung Electronics, the country's largest chipmaker, over the same period.

The rally in the sobjang segment marks a shift from the market's usual focus on large chipmakers, with investors rotating into the suppliers that feed the semiconductor production chain.

Samsung Electronics lags the supplier cohort

While Samsung Electronics also participated in the broader semiconductor upswing, its share price gains over the three-month window fell short of those recorded by the materials, parts and equipment group.

The comparison underscores how quickly sentiment has turned toward the upstream supply chain, which had long been viewed as a secondary play on the memory chip cycle.

Conclusion: Given that the sector's outperformance over Samsung Electronics over the three-month stretch checks out, the characterization of a "900" rally in the semiconductor materials, parts and equipment group is Mostly True.