The share price of Dishman Carbogen Amcis Limited plunged 12 per cent; a day after the Income Tax (IT) Department conducted a ‘search and survey operation’ at the company’s head office and maintenance sites. As a result, the company’s stock fell below its previous 52-week low of Rs 110, touched on October 25, 2019 and also, hit a new 52-week low of 102.50 at the BSE on Friday.