Small-Cap Winners & Losers: U.S. Geothermal

Updated from 1:50 p.m. EDT with new stock prices

Small-cap followed as the major indices slumped into negative territory. The Russell 2000 was still down 1.15% at 727.19, and the S&P SmallCap 600 was likewise down 1.15% at 384.66.

Shares of U.S. Geothermal (HTM Quote), a Boise, Idaho, company that develops geothermal properties, soared 8.8% to $2.59. RBC Capital Markets initiated coverage of the stock with an outperform rating. U.S. Geothermal also announced a joint venture with Gerlach Green Energy to explore the Gerlach geothermal system located in northwestern Nevada.

Oil and gas company Endeavour (END Quote) jumped 8.2% to $1.72. The Houston-based company announced a natural gas discovery in the Norwegian North Sea. It said it will participate in the drilling of eight wells overall in 2008.

Willow Financial Bancorp (WFBC Quote) added 20.5% to $9.33. The Wayne, Pa., provider of commercial banking services announced Harleysville National (HNBC Quote) would buy it in an all-stock deal. Each share of Willow Financial stock will be exchanged for 0.73 shares of Harleysville stock. Harleysville National shares shed 4% to $13.54 on the news.

Also on the losing side, Westborough, Mass., information technology services company Virtusa (VRTU Quote) stumbled 12.8% to $10.45 after offering weak guidance. The firm predicted earnings between 70 cents and 79 cents a share for the fiscal year ending in March 2009. Analysts polled by Thomson Reuters are expecting EPS of 90 cents.

Finally, Guaranty Financial (GFG Quote), an Austin, Texas commercial and retail banking services provider, slipped 12.4% to $5.23. The company announced a stock offering of up to $350 million.