Why do SIA shares drop so much?

Could you elaborate on the reasons behind the significant drop in SIA shares? Is it due to the airline industry facing challenges globally, or are there specific factors affecting SIA? Have there been any recent financial missteps or management changes that could have contributed to this decline? Is the market sentiment towards SIA negative, or are investors simply responding to broader economic conditions? Additionally, how do SIA's financials compare to its competitors, and are there any long-term concerns that investors may be taking into account? Clarifying these points would help provide a more comprehensive understanding of the situation.