Memory Chips and Shipbuilders Break the Tape as Telecom Sinks

This quarter's Korean corporate season was defined by a brutal divergence: the top of the growth table is all about AI, defence, and heavy industry, while the bottom is a lonely telecom story. Memory semiconductors posted a median revenue jump of +256.8% year over year, and shipbuilding wasn't far behind at +52.7%, but telecom was the only sector in outright decline, with revenue down -10.1%. That gap — between a supercycle in chips and ships and a slow bleed in connectivity — is the defining feature of the season.

Revenue growth by industry (median YoY)

Memory chips and shipbuilders are the undisputed engines of this season

SK hynix delivered a staggering +256.8% revenue growth, with EBITDA up +420.9% year over year — a number that would be a typo in any other industry. Samsung Electronics, in the broader semiconductors and electronics bucket, grew revenue +130.0%, showing that the AI-driven demand for memory is not a one-company story. These two are the clear leaders, and their combined weight is pulling the entire Korean market's growth profile upward.

Shipbuilding is the second pillar: Hanwha Ocean grew revenue +65.2% and net profit +366.6%, while HD Hyundai Heavy Industries posted +52.7% revenue and +289.8% net profit growth. Samsung Heavy Industries lagged its peers with +20.4% revenue, but still delivered positive growth. This trio is riding a multi-year order backlog, and the profit acceleration shows that pricing power has finally arrived.

Telecom and displays are the ugly ducklings of the season

KT Corporation was the only company in the dataset to post a revenue decline, down -10.1%, with EBITDA falling -20.3% and net profit down -36.0%. That is a triple whammy: shrinking top line, collapsing margins, and a bottom line that is deteriorating even faster. LG Display is the other sore spot: revenue barely grew at +0.4%, but EBITDA fell -17.2% and net profit plunged -146.7%, a sign that even a slight top-line gain couldn't offset pricing pressure and cost inflation.

The plot twist: Hyundai Motor's profit deceleration is a warning sign for autos

Hyundai Motor's revenue grew just +1.9% year over year, but EBITDA collapsed -29.6% and net profit fell -15.9%. That is a sharp deceleration from the prior period's growth trajectory, and it stands in stark contrast to Kia, which grew revenue +12.6% and net profit +2.6%. The divergence within the same automotive industry is the surprise: Hyundai is losing its earnings momentum while Kia holds steady. This suggests that Hyundai's product mix or cost structure is under pressure, and it may be a canary in the coal mine for the broader auto sector if input costs remain elevated.

Cheap for the growth: SK hynix and Hanwha Ocean look like bargains

SK hynix trades at a P/E of 7.8x and EV/EBITDA of 8.7x, yet it is growing revenue at +256.8% and EBITDA at +420.9%. That is remarkably cheap for a company in the middle of a hypergrowth phase. Hanwha Ocean, with revenue up +65.2% and net profit up +366.6%, trades at just 11.8x earnings and 14.8x EV/EBITDA — not dirt cheap, but reasonable given the earnings explosion. On the expensive side, Samsung Electro-Mechanics trades at a P/E of 108.1x and EV/EBITDA of 49.6x, despite revenue growth of only +24.2% and net profit growth of +143.3%. The profit growth is impressive, but the multiple prices in perfection. Similarly, Hanwha Systems at 77.1x earnings and 41.2x EV/EBITDA looks rich for +45.5% revenue growth.

Income hunters: banks and Hyundai Mobis offer the best yields

Among the companies with dividend data, banks stand out: Shinhan Financial Group and KB Financial Group both trade at around 9.4-9.8x earnings and offer solid dividend yields, though specific yields are not provided in the dataset. Hyundai Mobis, with a P/E of 9.0x and EV/EBITDA of 6.3x, is another income candidate, having grown net profit +13.5%. For yield-focused investors, these financials and auto parts names provide a steady income stream with moderate growth, contrasting with the high-octane but low-yield tech and shipbuilding names.

Looking at the long view, Hanwha Aerospace stands out with a 3-year revenue CAGR of +55.8%, followed by Hanwha Ocean at +38.0% and SK hynix at +29.6%. These are the compounders that have consistently delivered, and their current growth rates suggest the momentum is not fading. The key risk to watch is whether the memory cycle peaks and whether shipbuilding's order backlog translates into sustained profitability. For now, the data says the winners are running far ahead of the laggards, and the valuation gap between the two groups is widening. Next quarter, watch for any sign of a slowdown in memory demand or a further deterioration in telecom and displays — those will be the early indicators of a shift in this bifurcated market.

Players: growth & yield (no absolute levels)