Toshiba tumbles for third day as second downgrade fans writedown fears

Shares in Toshiba fell more than 19 percent in morning trade on Thursday, clocking a third day of heavy losses after the Japanese tech-to-nuclear conglomerate said earlier this week it faced a potential multi-billion dollar writedown. "Although Toshiba is still assessing the exact amount of the impairment loss, its financial metrics will likely deteriorate further, potentially resulting in a negative equity position," said Masako Kuwahara, Moody's Lead Analyst for Toshiba. Toshiba said on Tuesda