(NASDAQ:ZGEN) ZymoGenetics, Inc. is currently trading at $9.73 with a surge of 83.58% from its close on Tuesday. The stock is currently trading with a volume of 17078928 trading shares.

Citigroup Inc. ( NYSE:C) has traded a[pproximately 7423934 trrading shares in the premarket sections. The stock is trading at $3.85 with a net gain of 0.52% from its previous days close.

SPDR S&P 500 ETF (NYSE:SPY)  is trading in the premarket sessions at $109.81 with a net gain of 0.16% and a trading volume of 3702038 shares.

Microtune, Inc. (NASDAQ:TUNE) last traded at $2.93 in the pre market sessions. The stock has gained approximately 18.62% at a trading volume of 3697483 shares.