Singapore’s Straits Times Index declined 0.8% to 3,230.90 as of the 12:30 p.m. trading break, taking the weekly decline to 0.9%. Almost three stocks fell for each that rose in the benchmark equity index of 30 companies.

Shares on the measure trade at an average 14.8 times estimated earnings, compared with about 15.6 times at the end of 2010, according to data compiled by Bloomberg. The following shares were among the most active in the market. 

Developers: Singapore will increase down payments for second mortgages and impose a stamp duty on property held for less than four years to cool property prices. The nation’s private home prices climbed to a record in the fourth quarter as the fastest economic growth since independence helped counter earlier measures.

CapitaLand (CAPL SP), Southeast Asia’s biggest developer, dropped 3.4% to $3.71. City Developments. (CIT SP), Singapore’s second-largest real-estate company, declined 4.4% to $12.18. Keppel Land (KPLD SP) decreased 3.3% to $4.72.