Nintendo posted its latest quarter's dire results, causing traders to dump the stock. The sell-off sent the stock down more than 20 percent.
TEPCO shares were left untraded on a glut of sell orders amid concerns that the government would be nationalizing the company after the Fukushima nuclear plant disaster.
Beijing unpegged the Chinese yuan from the dollar last weekend, leading to a half-point rise against the US currency this week. The value of China's currency has been a highly contentious issue with trade partners.
This month China bought stakes in French, Canadian, and Australian firms.
China's government is bargain-hunting internationally as the financial crisis pushes down prices of energy resources and assets.
Large foreign-currency reserves and overhauled regulatory systems have helped stability. Investors also seem to be better targeting which currencies are at risk.
Its growth rate slowed to 9 percent in the third quarter as exports to the US and Europe start to slacken.
Job No. 1 for central bankers: restore confidence in markets.
Emerging economies are now big enough to help but not save Western giants.