SK Hynix Hits Record Highs, But Its Generous Bonus Model Raises Questions

SK Hynix shares hit record highs on HBM shortage, but an uncapped profit-sharing plan could balloon costs and erode margins, analysts warn.

The arithmetic of success at SK Hynix is turning into a delicate balancing act. The stock touched an all-time high of 1,932,000 won in Seoul on Monday, propelled by a 13% intraday surge, as investors bet on a prolonged shortage of high-bandwidth memory (HBM) for AI accelerators. The gains have been staggering: up roughly 185% year-to-date and 88% over the past 30 days alone. Yet the very profitability driving that rally is triggering a cost spiral that few analysts had fully booked into their models.

The immediate driver is simple enough. SK Hynix has effectively sold out its HBM capacity for 2025 and 2026, and reports suggest the company has raised prices for fifth-generation HBM3E chips by around 20% for 2026 deliveries. Market participants now expect supply tightness to persist well into 2027. That has turned the memory maker into a pricing powerhouse, with Morningstar projecting an operating margin of 75.7% by 2026, up from 48.6% last year. For a commodity semiconductor business, that would be extraordinary.

But the flip side is a compensation structure that directly converts operating profit into employment costs. SK Hynix runs a profit-sharing scheme that distributes 10% of operating profit to its roughly 35,000 employees. The previous cap — 1,000% of base salary — was scrapped in union negotiations, replaced by an uncapped model locked in for a decade. This February, staff received average bonuses of about 140 million won ($95,000) per head. Should analysts’ 2026 operating profit forecast of roughly 250 trillion won materialise, the bonus pool alone would swell to 25 trillion won.

That prospect is drawing scrutiny from analysts who worry the model may erode the cost advantage SK Hynix currently enjoys. “Higher memory prices could again bring wage costs and bonuses to the forefront,” warned Jung Woo-sung, an analyst at LS Securities. “If competitors offer bonuses at a higher ratio to operating profit, demands inside SK Hynix could increase.”

The broader Korean chip sector is also feeling the heat. Samsung’s union has called a general strike from May 21 to June 7, with Professor Kwon Seok-joon of Sungkyunkwan University estimating potential direct losses of up to $11.7 billion. For SK Hynix, the timing is mixed: the strike could further tighten supply and lift prices, but it also raises the stakes for its own labour relations.

Meanwhile, big technology companies are offering unprecedented terms to secure future output. According to media reports, major AI firms are making “unprecedented” investment and purchase proposals, including direct financing of production lines and EUV lithography equipment, to lock in supply. That suggests customers see SK Hynix’s capacity as mission-critical, and are willing to help fund its expansion.

SK Hynix plans to spend about 50 trillion won on capital expenditure and R&D in 2026, up 20-30% from last year. The bulk of that will go toward ramping mass production of HBM4 and 321-layer NAND. The goal is to stay ahead in a market where lead times are measured in months and pricing power depends on being first to next-generation nodes.

Despite the rally, the stock still trades at a forward price-to-earnings ratio of roughly 5.2, based on next twelve months’ estimates. Analysts at SK Securities have set a target of 3,000,000 won, arguing that the semiconductor super-cycle justifies higher multiples. The first quarter already offered a taste: operating profit hit 37.61 trillion won, a fivefold jump, with a margin of 72%. Free cash flow turned positive, net liquidity rose to 35 trillion won, and total debt dropped to 19.3 trillion won.

Dividends are expected to climb sharply as well. Morningstar forecasts a 2026 payout of 15,000 won per share, up from just 3,000 won last year, as cash piles up.

The challenge now is execution. SK Hynix must bring HBM4 into volume production without diluting its industry-leading margins. If it succeeds, the supply crunch will support those extraordinary profit levels. But if the expansion falters — or if the bonus bill grows faster than the market expects — the extreme run-up in the stock will become harder to justify. For now, every record high comes with a cost attached.