Toshiba profit markdown said to double

• Toshiba (OTCPK:TOSYY) shares are poised to feel more pressure after an ongoing investigation into past accounting practices found more irregularities than previously expected.
• A source familiar with the matter said Toshiba may need to write down past earnings by over ¥100B ($818M), more than double earlier estimates.
• Since the company disclosed the internal investigation in early April, shares have fallen 22% and many analysts have suspended their ratings.