Hold On to that Six Flags Stock, But Wait For More Thrills Before You Take the Plunge Posted byCHRIS MARKOCH February 23, 2021 Leave a comment on Hold On to that Six Flags Stock, But Wait For More Thrills Before You Take the Plunge The company had to close its entire network of theme parks due to the Covid-19 pandemic. Still, investors have been rewarded with a gain of nearly 270%.