Toshiba shares fell more than 20 per cent on Thursday, the third straight day of heavy losses.
The Japanese industrial giant has now had nearly half its market value wiped off since Monday, the BBC reported.
It comes after the firm warned that its US nuclear business may be worth less than previously thought.
Shares were down 25 per cent at one stage in Tokyo, having lost 20 per cent and 12 per cent in previous sessions.
Toshiba said the possible heavy one-off loss was linked to a deal done by a US subsidiary, Westinghouse Electric, the BBC noted.
Toshiba President Satoshi Tsunakawa apologised for "causing concern".
Rating agencies Moody's and R&I have both downgraded Toshiba's credit rating, which will make it more expensive for the company to borrow. R&I warned that it could issue further downgrades.
While the share price slump is a blow for investors, 2016 had still been a pretty good year, with the stock rising more than 77 per cent before this week's falls.
--IANS
ksk
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
