Premarket gainers: GRPN +24%. ACHN +7%. DKS +6%. ZNGA + 6%. Losers: SUMR -31%. AVP -13%. TEF...

|By:, SA News Editor

Premarket gainers: GRPN +24%. ACHN +7%. DKS +6%. ZNGA + 6%.
Losers: SUMR -31%. AVP -13%. TEF -8%. NBG -6%. CEL -6%.