Asia's chip-driven melt-up collided with a firming yen and a softer Wall Street close, handing the US session a mixed setup heading into back-to-back PPI and CPI prints this week.
Korea's KOSPI extended its parabolic run again as Samsung and SK Hynix rode the AI-memory bid, while Tokyo's Nikkei pushed higher behind SoftBank and Advantest strength. Hang Seng lagged, slipping on energy and education-sector weakness, and the CSI 300 traded a quieter gain as mainland desks stayed cautious. The regional split, semis euphoria in Seoul and Tokyo against a flatter Hong Kong and Shanghai tape, is the tell: this is a single-sector rally, not a broad risk-on wave.
USD/JPY has slid back toward the 153-154 handle, its firmest level since February, as carry unwinds, repatriation flows and political pressure on the BOJ chip away at the dollar bid built since July's 40-year low. USD/CNH is tracking that move lower in sympathy. A stronger yen is a headwind for the exact carry trades that funded the Nikkei and KOSPI tech surge, and Tuesday's US session, with the S&P and Nasdaq both softer and VIX popping over 5%, already showed cracks. US futures open flat-to-cautious, digesting overnight semis strength against a fragile domestic tape ahead of Thursday's PPI and Friday's CPI, the last major prints before the Fed's September 15-16 quiet period.
The risk: a hot PPI or CPI print forces a repricing of cut odds just as the yen carry unwind accelerates, a combination that hits high-beta AI and semis names on both sides of the Pacific simultaneously and turns this morning's mixed tape into a synchronized risk-off leg.