Rough Day for World Markets

Stocks were plunging overseas Tuesday, led by diving equity measures in Asia, particularly mainland China.

Hardest hit among major indices was the Shanghai and Shenzhen 300 Index, a capitalization-weighted measure that tracks the daily performance of the 300 most representative A-shares listed on the Shanghai or Shenzhen stock exchanges. The index sank 9.2% to 2457.

Elsewhere, Tokyo's Nikkei 225 lost 0.5% to 18,120, and Hong Kong's Hang Seng tumbled 1.8% to 20,148. ...