Pre-Market Top Percentage Gainers and Losers (XNPT, GSK, ZAGG, LOGI, BBBY, PRXL, BLUD, INHX, PWER, INTC, TZOO, KERX)

Best 1) XenoPort

: Posting a huge pre-market gain of 68.61% to $10.77. An FDA approval for its drug, along with partner GlaxoSmithKline

, has shares skyrocketing. 2) ZAGG

: Trading up 13% to $9.28. Investors are responding well to an agreement with Logitech International

to market its tablet computer case with keyboard. 3) Bed Bath & Beyond

: Sustaining a 10.75% gain in early morning trading after posting great fourth-quarter results and issuing a bullish full-year forecast. 4) Immucor

: Currently positive 7.16% at $21.41. The company reported third-quarter results topping estimates. 5) ImmunoGen

: Making an early morning 5.91% pop to $9.85 after a report from Roche announced positive results from the first randomized trial of a drug containing the company's DM1 cancer-cell killing agent. Worst 1) Inhibitex

: Today's biggest loser thus far. Trading 8.41% to the downside at $4.25 in the early session. Traders are not responding well to an announcement saying that the company will be undertaking a public offering to finance research and development. 2) Power-One

: Taking a 3.86% hit to $7.97. 3) Intel

: In negative territory by 2.64% to $19.91 thus far. 4) Travelzoo

: Starting the pre-market hours in the red by 2.43% to $75.99. The company was downgraded from Buy to Hold at Benchmark. 5) Kerx Biopharmaceuticals

: Rounding out the top five in the pre-market session, shares are dipping 1.86% to $5.28.