Singapore shares may open lower on Wednesday, following losses on Wall Street overnight as weaker-than-expected US economic data stoked concern over the resilience of the country's economic growth.

The benchmark Straits Times Index gained 0.64% on Tuesday to 2,906.69 points. Here are some stocks and factors to watch, according to Reuters:

Public transport operator SMRT Corp is set to be in focus after it said its third-quarter net profit fell nearly 14% to $37 million, hurt by higher operating expenses. It also warned the profitability of its train operations in the next 12 months will be hurt by the costs of recent disruptions to train services.

Mapletree Commercial Trust, which owns offices and retail properties, said its third quarter distribution per unit was 1.428 cents, 15.5% above its forecast.

SIA Engineering, a unit of Singapore Airlines said its third-quarter net profit rose 5.3% to $63.5 million, helped by higher revenue from fleet management and an increase in airframe and component overhaul work.

Chip Eng Seng said a wholly-owned subsidiary has been awarded a $125 million contract from Singapore's Housing & Development Board for building works in the city-state.

Singapore engineering and construction firm Tiong Woon said a subsidiary has clinched a contract to help build what it says will be the city-state's largest sea water desalination plant.