SIA Engineering’s share price has soared recently, with the stock up around 43% year-to-date (YTD). Investors may be asking: What is contributing to this rally, and will it persist? BackgroundSIA Engineering Company Ltd (SGX: S59), or SIAEC, is the maintenance, repair, and overhaul (MRO) arm of Singapore Airlines (SGX: C6L).It provides aircraft line maintenance, engine overhaul, and related services, and its client base includes more than 80 international carriers – with Singapore Airlines being one of them ...