The mines ministry has favoured an American Depository Receipt issue for diluting government stake in National Aluminium Company. Cabinet Committee on Disinvestment had earlier cleared disinvestment of 30 per cent stake in the aluminium major through ADR/GDR issue along with domestic float. However, it had left open the percentage of stake to be offered through various routes. ADR issue is being favoured because the department felt that the company can withstand the pressure of gong for the issue.