Asia repriced the AI memory trade on a record inventory squeeze while US markets were shut

Methodology note: Morning report, generated on Labor Day, September 7, with US equity and bond markets closed. Levels are the Asian and European sessions against the September 4 US close. Sources cited inline.

Asia Repriced The Memory Complex While US Markets Sat Out Labor Day

With US cash equities and Treasuries shut, Monday's pricing happened in Seoul and Tokyo. The Kospi closed 4.61% higher at 6,995.39 and the Nikkei 225 rose 2.12% to 66,399 after KB Securities put memory inventories at Samsung Electronics and SK Hynix below ten days of supply and forecast memory taking 57% of a $1.3 trillion hyperscaler capital budget in 2027, against 14% in 2025. That is a claim about who captures AI spending rather than how large it is: the shortage that lifts memory makers raises the bill for everyone who buys their output. Europe went the other way on oil, with Brent near $97.58 after Iran said it would declare a restricted zone beyond Hormuz.

• KB Securities said memory inventories at Samsung and SK Hynix have fallen below ten days of supply, and put hyperscaler AI infrastructure spending at about $1.3 trillion in 2027, up 60%, with memory taking 57% of it against 14% in 2025 — its research head expects DRAM and NAND bit demand to run more than ten percentage points ahead of supply next year, which is a projection, not a shipment figure
• The Kospi closed up 4.61% at 6,995.39 on net buying from both foreign and institutional accounts — within five points of 7,000, a level the index has never closed above
• The Nikkei 225 closed 1,378 points higher at 66,399 — semiconductors and AI-linked names supplied nearly all of it, so the Japanese move is narrower than the index gain suggests
• SanDisk rose 8% and Micron 5% on Friday while the S&P 500 fell 0.38% — memory led on a session the broad market sold, so Monday extended a divergence rather than starting one
• NVIDIA told its largest customers on August 22 that AI server prices will rise more than 15% on Vera Rubin and Grace Blackwell configurations shipping in early 2027, with memory now 40-50% of a server's bill of materials against 30-35% a year ago — the cost this rally represents is charged onward to the buyer
• Brent for November traded up 1.4% at $97.58 after US forces struck three Iranian oil tankers on Saturday and Iran's national security chief said a restricted maritime zone would extend from the US blockade line toward the Strait — the energy input that reaches Thursday's PPI before it reaches anything else

September 7, 2026, With US Markets Closed

What changed since last report

• The Hormuz risk moved from threat to enforcement. Friday night's report named the Strait as the energy input into Thursday's PPI. Since then US forces struck three Iranian tankers and Tehran said a restricted zone would follow, and Brent has gone from roughly $92 to $97.58 — the input grew before the print rather than after it.
• The memory news is a broker's forecast, not a supplier's disclosure. No company confirmed an inventory or shipment figure on Monday. What moved the Kospi was an estimate of days of supply and a 2027 capex projection, and the earliest company data that can test either is more than a week out.
• US rates had no venue to reprice. The 10-year held 4.79% and the 30-year 5.25%, with September hike odds near 57% from Friday's close. Three days of escalation and a memory repricing accumulated with nothing able to express them until Tuesday.
• This tightened an existing shortage rather than revealing one. J.P. Morgan Global Research estimates DRAM prices rise more than 400% between the start of 2024 and the end of 2026. The levels that define the picture are unchanged because nothing traded: 4.818% on the 10-year, 5.30% on the 30-year, 7,700 on the S&P 500 and $95 on WTI.

Movers

• Kioxia (+7.93%): the purest NAND exposure in Tokyo and the single largest contributor to the Nikkei's move. It trades on contract pricing rather than volumes, so a rollover in NAND contract prices takes it back the way it came.
• SoftBank Group (+6.82%): rose on its AI portfolio and index weight rather than any company disclosure, which makes it the leveraged version of the same trade and the first to give back a memory reversal.
• Novartis (-3.3%): pelacarsen failed to cut cardiovascular death, heart attack or stroke against placebo in the Phase 3 HORIZON trial despite lowering Lp(a) as designed — partner Ionis fell about 12%, and the result questions the Lp(a)-lowering class rather than one compound.

What to watch

Tuesday's open takes all of it at once. US cash markets reopen at 9:30 ET carrying three days of Hormuz escalation, the Asian memory repricing, and Canada's retaliatory tariffs on $27.6 billion of US goods, which take effect the same morning. The split matters more than the index level: semis against software. Friday already had semiconductors up and software down on a session the S&P fell 0.38%, and a wider gap Tuesday says the market is pricing memory as a transfer between sectors rather than an expansion of total AI spending.

August PPI on Thursday is where the oil move lands first. Brent at $97.58 and WTI's roughly 9% weekly gain reach producer prices before consumer prices, and the 8:30 ET print arrives with the FOMC in blackout through September 17, so no official can soften it. ISM services prices paid at 72.6 in August points the same direction. WTI closing above $95 before the print would make energy the dominant line in it.

Whether a 2027 capex number survives contact with a print. Seoul traded Monday on hyperscaler spending KB puts at $1.3 trillion next year. Oracle reports Q1 FY2027 on Thursday with a $20 billion equity issuance behind it — the first large AI-capex disclosure of the month, and the first opportunity for a company rather than a broker to confirm or undercut the number.