Singapore shares may fall slightly on Tuesday after Tokyo’s Nikkei share average opened 0.25% lower. Wall Street erased earlier losses and ended little changed overnight as investors shrugged off a surprise weekend interest rate hike by China’s central bank.

Singapore’s benchmark Straits Times Index <.FTSTI> rose 0.49% on Monday to 3,159.36 points. Here are some stocks and factors to watch:

Keppel Corp (KPLM.SI), the world’s biggest rig maker, may be in focus after it said late on Monday its offshore and marine unit had won contracts worth $240 million.

Singapore Exchange (SGXL.SI) will try to push through its proposed US$7.8 billion ($10.1 billion) acquisition of ASX (ASX.AX) despite strong opposition in Australia, SGX CEO Magnus Bocker said in an interview with the Straits Times newspaper on Tuesday.

Think Environmental (THEC.SI), a Singapore-based firm that invests in and manages renewable energy businesses, said on Monday it will acquire 70% of Mornington Offshore for US$35 million ($45.4 million). The purchase will give Think Environmental control of gold concessions in Mali in Western Africa.

Rickmers Maritime (RIMT.SI), a Singapore container shipping trust, said on Monday that Compania Sudamericana de Vapores had extended the charter of its ship for another 12 months at a daily net charter rate of US$23,888 ($30,975.6) per day, up from the current US$8,288.

Oil and gas firm RH Petrogas (RHPG.SI) said on Monday it had obtained loans of up to a total of US$85 million ($110 million) from BNP Paribas and RH Capital to fund its acquisition of Pearloil Basin, Pearloil Island, Lundin Salawati Basin and Lundin Indonesia.