After hours trading statistics shouldn't be taken too seriously, because there are far less traders resulting in less liquidity/larger spreads. For all we know, the -40% quote was triggered by a single trade [perhaps a panicked investor agreed to sell his shares at a 40% discount]. [http://en.wikipedia.org/wiki/Extended_hours_trading]. For all we know, it might tank tomorrow, but it hasn't yet.
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After hours trading statistics shouldn't be taken too seriously, because there are far less traders resulting in less liquidity/larger spreads. For all we know, the -40% quote was triggered by a single trade [perhaps a panicked investor agreed to sell his shares at a 40% discount]. [http://en.wikipedia.org/wiki/Extended_hours_trading]. For all we know, it might tank tomorrow, but it hasn't yet.
According to nasdaq.com there were 5.9MM ZNGA shares traded in the after hours session: http://community.nasdaq.com/News/2012-07/after-hours-most-ac...