As financial markets in Asia recover from the Fed's decision to keep rates unchanged, other risk events will likely serve up fresh volatility this week.

China's flash Caixin purchasing managers' index (PMI) for September will be announced on Wednesday at 9.45am local time.

In the previous month, activity in the mainland's manufacturing sector slowed markedly, underlining signs of sputtering growth in the world's second-largest economy. The final Caixin/Markit PMI slipped to 47.3 in August, the lowest reading since March 2009, while the official PMI dropped to 49.7 - the weakest level since August 2012.

A print above 50 indicates an expansion in activity while one below points to a contraction.