Top Percentage Gainers and Losers as of 10am 4/20/11 (PII, ALB, GLNG, VMW, DPL, PJC, BRKL, BARI, DST, URI, WFC)

Best

1) Polaris Industries (NYSE: PII): Trading up 16.3% from yesterday's close to $106. Reported better than expected earnings this morning. The company earned $1.34 per share versus estimates of $0.70 per share. Sales also topped estimates coming in at $537.2 million versus the $422.5 million forecast.

2) Albemarle (NYSE: ALB): Trading up 12.6% from yesterday's close to $65.15. Yesterday's positive earnings report has shares up this morning. The company's first-quarter profits rose 68% due to increased sales and higher margins.

3) Golar LNG (NASDAQ: GLNG): Trading up 10.8% from yesterday's close to $29.10.

4) VMware (NASDAQ: VMW): Trading up 10.3% from yesterday's close to $94.90.

5) DPL (NYSE: DPL): Trading up 8.8% from yesterday's close to $30.00

Worst

1) Piper Jaffray Companies (NYSE: PJC): Trading down 8% from yesterday's close to $34.90. The company fell short of consensus revenue figures, reporting $124.8 million versus estimates of $140 million.

2) Brookline Bancorp (NASDAQ: BRKL): Trading down 7.6% from yesterday's close to $9.31. The company has agreed to purchase Bancorp Rhode Island (NASDAQ: BARI) for $234 million in a cash and stock transaction.

3) DST Systems (NYSE: DST): Trading down 6.5% from yesterday's close to $49.58.

4) United Rentals (NYSE: URI): Trading down 5.4% from yesterday's close to $29.80.

5) Wells Fargo & Company (NYSE: WFC): Trading down 4.3% from yesterday's close to $28.77.