Singapore’s Straits Times Index dropped 1.3% to 3,188.57 at the 12:30 p.m. trading break, trimming this month’s advance to 0.1%. All but two stocks in the benchmark index of 30 companies fell.

Shares on the measure trade at an average 14.6 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. 

Micro-Mechanics Holdings (MMH SP), a manufacturer of tools for the semiconductor industry, gained 2.1% to 49.5 cents. The company said second-quarter profit doubled to $1.80 million.

 

Neptune Orient Lines (NOL SP), Southeast Asia’s biggest container carrier that gets about a quarter of its revenue from Asia and the Middle East, slipped 1.8% to $2.20. Egyptian protesters defied a curfew and demonstrated against President Hosni Mubarak for a sixth day, sparking speculation the crisis will slow the global economic recovery.