Active traders and day traders have many stocks to choose from this Thursday morning.  We are tracking news and moves in shares of Cerus Corporation (NASDAQ: CERS), EXFO Electro-Optical Engineering (NASDAQ: EXFO), SemiLEDS Corporation (NASDAQ: LEDS), and Micron Technologies (NASDAQ: MU).

Cerus Corporation (NASDAQ: CERS) is up nearly 15% premarket to $3.30, relative to a 52-week range of $1.80-$4.01.

EXFO E
lectro-Optical Engineering (NASDAQ: EXFO) is up 7.2% premarket to $8.78, above the previous 52-week range of $4.65-$7.84. The company has reported better-than expected Q1 earnings.

SemiLEDS Corporation (NASDAQ: LEDS) is down more than 32% to $19.27, relative to a 52-week range of $23.14-$32.12. The company’s Q1 fiscal results were well below expectations.

Micron Technologies (NASDAQ: MU) is up 4% to $9.75 on very heavy volume. Shares of MU have traded within a 52-week range of $6.36-$11.40.