Singapore’s Straits Times Index gained 0.2% to 3,143.80 as of the 12:30 p.m. close, trimming this week’s decline to 0.3%. The market shut early today for Christmas Eve. Two stocks advanced for each that fell in the benchmark equity index of 30 companies.

Shares on the measure trade at an average 15.3 times estimated earnings, compared with about 17.4 times at the beginning of the year, according to data compiled by Bloomberg.

The following shares were among the most active in the market. Stock symbols are in parentheses after the company name.

Oil rig-builders: The world’s biggest builders of oil rigs advanced after crude oil futures rose to a two-year high as confidence among US consumers increased to the highest in six months.

Keppel Corp. (KEP SP), the world’s biggest builder of oil rigs climbed 0.9% to $10.80. Smaller rival Sembcorp Marine (SMM) increased 0.6% to $5.06.