Active traders and day traders have many stocks to choose from this Tuesday morning.  We are tracking news and moves in shares of Cubist Pharmaceuticals (NASDAQ: CBST), Expedia, Inc. (NASDAQ: EXPE), and SemiLEDs Corporation (NASDAQ: LEDS).

Cubist Pharmaceuticals (NASDAQ: CBST) is up 15% to $29.20, relative to a 52-week range of $19.65-$25.48. The company was upgraded to outperform from neutral at Robert W. Baird.

Expedia, Inc. (NASDAQ: EXPE) is up 5% premarket to $23.57, relative to a 52-week range of $18.30-$28.95.

SemiLEDs Corporation (NASDAQ: LEDS) is down 23.5% premarket to $11.05, relative to a 52-week range of $14.54-$32.12. The company posted losses in its 2Q report and issued guidance for a loss in the third.