We have found the following stocks had unusual volume spikes on Friday, September 07, 2012.

Peregrine Pharmaceuticals Inc. (NASDAQ PHM) had a 97.4% volume spike trading 29,190,800 shares. PPHM's 30-day average volume is 758,205. Shares closed at $4.50 +47.54%. Peregrine Pharmaceuticals, Inc. is a biopharmaceutical company developing first-in-class monoclonal antibodies for the treatment and diagnosis of cancer.

American Realty Capital Trust (NASDAQ:ARCT) had a 95.1% volume spike trading 17,929,800 shares. ARCT's 30-day average volume is 886,955. Shares closed at $12.37 +3.43%. American Realty Capital Trust Inc is a real estate investment trust. The company primarily acquires, owns and manages a portfolio of free-standing commercial properties that are leased to a diversified group of credit worthy companies.

Lululemon Athletica Inc. (NASDAQ:LULU) had a 79.9% volume spike trading 17,124,600 shares. LULU's 30-day average volume is 3,444,220. Shares closed at $77.14 +12.45%. The Company is engaged in the design, manufacture and distribution of healthy lifestyle inspired athletic apparel, which is sold through a chain of corporate-owned and operated retail stores, independent franchises and a network of wholesale accounts.

Smith & Wesson Holding Corp. (NASDAQ:SWHC) had a 90.4% volume spike trading 14,265,000 shares. SWHC's 30-day average volume is 1,369,460. Shares closed at $10.07 +15.48%. Smith & Wesson Holding Corporation manufactures an array of pistols, revolvers, tactical rifles, hunting rifles, black powder firearms, handcuffs, and firearm-related products and accessories.

Suntrust Banks (NYSE:STI) had a 54.3% volume spike trading 13,905,900 shares. STI's 30-day average volume is 6,353,510. Shares closed at $27.50 +8.06%. SunTrust Banks, Inc, is a financial services holding company whose businesses provide a broad range of financial services to consumer and corporate clients.

Radian Group Inc. (NYSE:RDN) had a 66.7% volume spike trading 10,844,300 shares. RDN's 30-day average volume is 3,610,140. Shares closed at $4.33 +31.21%. Radian Group, Inc. through its subsidiaries and affiliates, provides credit-related insurance coverage and financial services to mortgage lenders and other financial institutions.

Mechel Steel Group Oao (NYSE:MTL) had a 61.6% volume spike trading 9,811,700 shares. MTL's 30-day average volume is 3,764,950. Shares closed at $6.99 +22.63%. A vertically integrated mining, steel, ferroalloys and power group.

Comverse Tech Inc # (NASDAQ:CMVT) had a 45.5% volume spike trading 7,731,900 shares. CMVT's 30-day average volume is 4,212,550. Shares closed at $6.38 +9.25%. Comverse Technology, Inc. designs, manufactures, markets, and supports computer and telecommunications systems and software for multimedia communications and information processing applications.

Ulta Salon Cosmetics & Fragrance (NASDAQ:ULTA) had a 58.2% volume spike trading 3,115,000 shares. ULTA's 30-day average volume is 1,302,000. Shares closed at $101.54 +9.28%. Ulta Salon Cosmetics & Fragrances, Inc. is a beauty retailer that provides one-stop shopping for mass and salon products and salon services in the United States.

Retail Properties Of America (NYSE:RPAI) had a 86.8% volume spike trading 2,509,600 shares. RPAI's 30-day average volume is 331,285. Shares closed at $11.46 +2.60%. Inland Western Retail Real Estate Trust, Inc is a self-managed REIT focused on the acquisition, development and management of strategically located retail assets.