Since the beginning of 2025, several companies have stood out on the Singapore Exchange (SGX: S68) with impressive gains.Amongst the standout performers are three of these SGX top-performing stocks: Singapore Technologies Engineering Ltd (SGX: S63), DFI Retail Group (SGX: D01), and Jardine Matheson Holdings (SGX: J36).These companies have reported astonishing year-to-date (YTD) double-digit returns.The question now is whether these gains are built on solid fundamentals or if investors should be wary of the ...