The following companies may have unusual price changes in Singapore trading. Stock symbols are in parentheses, and share prices are from the previous close. Singapore’s Straits Times Index was little changed at 3,185.76.

Boustead Singapore (BOCS SP): The provider of engineering services said its Boustead Salcon Water Solutions Pte. won a $25 million contract to build a water demineralization plant for a unit of Tuas Power, a supplier of electricity in Singapore. The stock was unchanged at $1.12.

ComfortDelGro Corp. (CD SP): The biggest operator of taxis and buses in Singapore said it has been awarded permits to add 800 new taxis to its fleet in Chengdu, China, making it the second-biggest taxi operator in the city. The shares were unchanged at $1.62.

Hiap Seng Engineering (HSE SP): The provider of engineering services to the petroleum and petrochemical industries said it won two contracts from China and the Middle East, valued at US$9.4 million ($12.1 million). Hiap Seng gained 0.8% to 64.5 cents.

Keppel Corp. (KEP SP): The world’s biggest builder of oil rigs will announce full-year results after the close of trading tomorrow. The company is expected to report a profit of $1.3 billion, according to the average estimate of 22 analysts compiled by Bloomberg. That compares with $1.63 billion in 2009. The stock slipped 0.9% to $11.26.

Keppel Land (KPLD SP): The real estate arm of Keppel Corp. said its fourth-quarter net income surged to $841 million from $106.9 million a year earlier, boosted by one-time gains. The shares gained 0.9% to $4.57.

Pacific Andes Resources Development (PAH SP): The Singapore-based processor of frozen seafood and vegetables postponed its first sale of yuan-denominated bonds in Hong Kong citing poor markets, Katie Tsui, an investor relations manager at the company, said in a telephone interview from Hong Kong. The so-called Dim Sum market is volatile and recent offerings by Chinese property companies pushed yields “quite high,” she said. The stock was unchanged at 37 cents.

SIA Engineering Co. (SIE SP), the aircraft maintenance unit of Singapore Airlines (SIA SP), will release its third-quarter results after the close of trading tomorrow. The company is expected to report a net income of $66 million, according to average estimates of two analysts compiled by Bloomberg. That compares with $56 million a year ago. SIA Engineering gained 0.2% to $4.26.