US stocks dropped and Taiwan index futures fell hard overnight, a bad sign for investors betting the Fed was done raising rates.

• August US producer prices came in hotter than expected, pushing traders to bet the Fed will raise rates again.
• Oil topped $100 a barrel, adding to worries that inflation is not under control.
• All four main US indices fell, with chip stocks hit hardest.
• Taiwan index futures plunged more than 700 points in night trading, and TSMC's US-listed shares and Nvidia both fell about 2.5%.

Outlook: Asian markets look set for a rough session, and attention now turns to whether the Fed signals another rate hike.