By Niket Nishant and Manya Saini (Reuters) -Donald Trump Jr.-backed GrabAGun's shares slipped 22% on Thursday, deepening their post-debut slide and highlighting the degree of investor scrutiny even newly listed companies with high-profile backers are being subjected to.

Donald Trump Jr., a board member and shareholder of GrabAGun, rang the opening bell for the New York Stock Exchange to chants of “USA!” from the floor.

Steps away from the Trump Organization’s 40 Wall Street building, Donald Trump Jr. on Wednesday heralded the debut of a gun retailer that made him $4 million richer.