Top Percentage Gainers and Losers as of 10am 4/28/11 (LOOP, HRZ, LFT, FTNT, PACR, AKAM, OMX, TER, TDSC, FOE)

Best

1) LoopNet (NASDAQ: LOOP): Trading up 27% from yesterday's close to $18.26.

2) Horizon Lines (NYSE: HRZ): Trading up 24.7% from yesterday's close to $2.37.

3) Longtop Financial Technologies (NYSE: LFT): Trading up 16.8% from yesterday's close to $20.67.

4) Fortinet (NASDAQ: FTNT): Trading up 13.1% from yesterday's close to $47.20.

5) Pacer International (NASDAQ: PACR): Trading up 13% from yesterday's close to $5.79.

Worst

1) Akamai Technologies (NASDAQ: AKAM): Trading down 15.2% from yesterday's close to $34.75.

2) Officemax (NYSE: OMX): Trading down 14.7% from yesterday's close to $10.65.

3) Teradyne (NYSE: TER): Trading down 10.5% from yesterday's close to $16.36.

4) 3D Systems (NASDAQ: TDSC): Trading down 10.4% from yesterday's close to $46.42.

5) Ferro (NYSE: FOE): Trading down 9.3% from yesterday's close to $15.13.