Market SnapshotSingapore stocks opened lower on Friday. STI down 0.1%; DFIRG up 5%; SIA, CapitaLand Ascott, Singtel and Wilmar down 1%.Stocks in FocusCapitaLand Ascott Trust (Clas), Sheng Siong Group : The hospitality player and supermarket chain operator, respectively, will join the Straits Times Index’s (STI) reserve list, after the December quarterly review. These two counters will replace Olam Group and Yangzijiang Financial on the list, said the Singapore Exchange on Thursday. No changes to STI constituents will be made after this review. Stapled securities of Clas closed flat at S$0.94 on Thursday, while shares of Sheng Siong closed at S$2.62, down S$0.02 or 0.8 per cent.Sunpower Group : The company said on Thursday that it will acquire stakes in two Chinese power projects. Its wholl