A significant amount of money has been traded by young adults on a prediction market. Federally regulated financial markets allow individuals 18 and over to participate. This has raised concerns among lawmakers and experts about potential risks to younger adults' finances and well-being.

The amount traded by young adults under 21 is substantial, with estimates suggesting billions of dollars have been exchanged. Further information about this issue can be found through a CNN analysis.

Details about the specifics of the prediction market and the concerns surrounding it are available from the source.