A day after Adani Group's shares took a beating as Hindenburg Research made damaging allegations against it, the group on Thursday said it is examining legal options to take "punitive action" against the US activist investor for its "reckless" attempt to sabotage a share-sale at the conglomerate's flagship firm. "The maliciously mischievous, unresearched report published by Hindenburg Research on January 24, 2023 has adversely affected the Adani Group, our shareholders and investors. The volatility in Indian stock markets created by the report is of great concern and has led to unwanted anguish for Indian citizens," the group's lead head Jatin Jalundhwala said in a statement.