Active traders and day traders have many stocks to choose from this Thursday morning.  We are tracking news and moves in shares of Dry Ships, Inc. (NASDAQ: DRYS), Exelixis, Inc. (NASDAQ: EXEL), Humana, Inc. (NYSE: HUM), and LTX-Credence Corporation (NASDAQ: LTXC).

Dry Ships, Inc. (NASDAQ: DRYS) reported extremely favorable 3Q earnings, boosting the stock 9% pre-market.

Exelixis, Inc. (NASDAQ: EXEL) was up 26% on heavy volume after reporting promising results on a prostate drug it currently has in trial.

Humana, Inc. (NYSE: HUM) is down roughly 8% after reporting worse-than expected earnings.

LTX-Credence Corporation (NASDAQ: LTXC) is up 32% pre-market on news the company will merge with Verigy Ltd.