When Tata Steel this month announced a non-cash write-down of Rs 1,577 crore for its Benga (Mozambique) project investment, the total write-offs made by Cyrus Mistry since taking charge as Tata Sons chairman reached Rs 13,201 crore ($2.2 billion). These have primarily been non-cash write-downs of goodwill in balance sheets of four companies.
In May, soda-ash maker Tata Chemicals had announced a Rs 924-crore write-down for its African operations through Tata Chemicals Magadi. The write-downs made this year by both Tata Steel and Tata Chemicals were the second in consecutive financial years for them.

Source - http://www.business-standard.com