Shares in electronics retailer Dick Smith (ASX: DSH) plummeted this week after the company announced on Monday a second downgrade following an earnings warning in October. Poor trading conditions meant management was unable to re-affirm its previous profit guidance while a review of inventories saw the company take a $60 million non-cash impairment charge. Dick Smith shares closed down 20.1% for the week. We do not own Dick Smith in the investment portfolio.