HONG KONG, April 29 (Reuters) - Shares of Chinese property developers rallied on Monday on market speculation that more stimulus measures are likely to be unveiled this week aimed at clearing inventory and boosting home purchase demand.

Hong Kong's Hang Seng Mainland Properties Index jumped 4.3% in the morning session, while mainland China's CSI 300 Real Estate Index surged 6.9%.

The rally appeared to be driven by speculation that the Communist Party Central Committee's Political Bureau will be meeting in late April to discuss property policies, analysts said.

Private property developers including Sunac China, and defaulted Shimao Group, KWG Group, Kaisa Group, Zhenro Properties and Fantasia all gained more than 20%.

State-backed China Vanke's shares in Hong Kong bounced 17% while its shares in Shenzhen rose 10%. Investors have been dumping Vanke's shares and bonds in the previous months on liquidity concern, and the company is due to announce its first quarter results on Monday.

(Reporting by Clare Jim; Editing by Shri Navaratnam)