Why is Six Flags Entertainment stock surging afterhours today?

Recent market activity shows divergent trends across several companies. Six Flags Entertainment experienced a stock surge during afterhours trading. In contrast, Insurance Australia and IDP Education both saw their stock prices sliding today. Additionally, Tuas witnessed a significant plunge in its stock value. These movements reflect varying performance outcomes for the mentioned entities, with one company gaining momentum while the others faced declines in their respective market valuations during the current trading period.