Investors appeared largely unfazed by the ruling, with Meta shares falling less than half a per cent in after-hours trading Thursday to $589.44. The ruling requires Meta to attempt to develop a dedicated prediction model for users under 13 within the next two years. Meta must also seek proof of age from New Mexico users it estimates are younger than 13. As part of the ruling, Meta must delete personal information collected from users under 13 and provide progress reports twice a year detailing its compliance with the court's orders. The states claim Meta contributed to the youth mental health crisis by knowingly designing Instagram and Facebook features that are addictive to children.