S&P upgrades SK Hynix (000660 KS / SKHY) to A- (prev. BBB+), amidst AI driven operating strength; outlook positive

• SK Hynix Inc.'s operating performance is likely to continue to surge over the next two years on extremely favorable memory sales and robust profitability and operating cash flow.
• We expect SK Hynix's strong operating performance to extend well into 2028.
• Hyperscalers' investments are likely to maintain favorable supply-demand dynamics.
• We see an increased likelihood that the memory market will become less volatile, with long-term agreements bringing in significant revenue and memory's role expanding within the broader AI industry.
• We raised to 'A-' from 'BBB+' our long-term issuer credit rating on SK Hynix and issue credit rating on its senior unsecured debt.
• The positive rating outlook reflects our view of a high likelihood of the memory industry expanding in size and profitability, with potentially reduced volatility.

Agency upgrades of a cyclical issuer mid-upcycle follow a familiar pattern: the rating tends to lag the earnings inflection, and the stated rationale, here structurally stronger memory profitability and multi-year demand visibility, mirrors the logic used in prior cycles where upgrades clustered after the cash flow had already inflected. The notable element is the claim of reduced volatility via long-term agreements, since agencies have historically been reluctant to assign structural durability to memory, an industry with a record of boom-bust supply discipline breakdowns. The transmission channel is the credit curve first: a one-notch move within the crossover-adjacent A/BBB boundary tightens senior unsecured spreads and compresses the issuer's CDS relative to its domestic and memory peer set, with the equity read-through typically second-order since the market prices the operating story well ahead of the rating. The positive outlook matters more than the notch itself; in past episodes it has signalled the agency's willingness to move again if leverage metrics hold through the next capex cycle. Follow-ons of interest are peer rating actions across the memory complex, the tenor of new issuance off the improved rating, and whether the agency's reduced-volatility thesis survives the next downturn in hyperscaler capex guidance.