The Nasdaq Composite Index tumbled toward its steepest one-day slide in almost 2½ years as investors resumed selling risky biotechnology and smaller technology smaller technology stocks after a ... more 
The Nasdaq Composite Index tumbled toward its steepest one-day slide in almost 2½ years as investors resumed selling risky biotechnology and smaller technology smaller technology stocks after a two-session reprieve. MoneyBeat's Steven Russolillo explains why on the News Hub. less 
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