Research in Motion had already warned that its latest quarterly numbers would be weaker than forecast.
The stock is a component in the Nasdaq-100. An ETF following the index, PowerShares QQQ (NasdaqGM: QQQ), was on a wild ride Thursday but finished fractionally lower as a late-session bounce helped limit its loss. [Nasdaq ETF Skids as Apple Pierces 200-Day Average]
PowerShares QQQ
