SHANGHAI - Mainland stocks fell the most in two weeks as rising property prices boosted concern the government will deepen measures to curb speculation and reports of a probe into rubber futures fuelled a sell off in commodity prices.

China Vanke Co and Industrial & Commercial Bank of China Ltd paced declines for developers and banks as Jones Lang LaSalle Inc said Chinese government may further tighten anti-speculation measures.

Jiangxi Copper Co dropped the most in three weeks as metal prices slid after the Securities Times reported that regulators were investigating large positions in natural rubber futures.