Market SnapshotSingapore stocks opened higher on Tuesday. STI rose 0.4%; Seatrium, Keppel, Singtel, and SGX rose about 1%; OCBC rose 0.7%; DBS and UOB rose 0.2%.Stocks in Focus$Thomson Medical(A50.SI)$: The mainboard-listed group on Monday announced that it has appointed Tong Kooi Ong, 66, as its independent, non-executive chairman to its board, effective Feb 1 this year. Tong succeeds Ng Ser Miang, 76, who steps down on Jan 31. Ng has been the chairman of Thomson Medical since 2015. The counter closed 1.6 per cent or S$0.001 lower at S$0.062 prior to the news.$Vin’s Holdings(VIN.SI)$: The car dealer on Monday launched a S$20 million multicurrency commercial paper facility programme to be issued entir