A man looks at a stock quotation board showing the Nikkei share average in Tokyo, Jan. 17.
The Nikkei suspended trading 20 minutes early Wednesday after a second day of sell-offs over-taxed the exchange's computer system.
The shutdown was the first in the history of the Nikkei, which was down nearly 3 percent at closing. Investors were panicked over a scandal involving Japan's best known Internet company, Livedoor. Renee Montagne talks to the BBC's Jonathan Head.