Valero, SanDisk Micron Technology Among Stocks Attracting Major Trading Interest Today

Through the opening portion of the trading day on Thursday, September 8, 2011, the Dow (NYSE:DIA) is up 8.6 points to 11,426, the NASDAQ (NASDAQ:QQQ) is up 11.9 points to 2,560 and the S&P500 (NYSE:SPY) is up 0.4 points to 1,199. Here are some of today’s biggest gainers by price.

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Valero Energy Corporation (NYSE:VLO) is among the top gainers as its shares are trading at $23.55, up $1.26 (+5.7%) from the previous close of $22.28. Valero Energy Corporation is an independent refining and marketing company, which owns and operates refineries that produce conventional gasolines, distillates, jet fuel, asphalt, petrochemicals, and lubricants.

Stock Price Performance: From July 12, 2011, to September 7, 2011, the stock price had fallen $2.90 (-11.5%) from $25.18 to $22.28. The stock price saw one of its best stretches over the last year between September 23, 2010 and October 1, 2010 when shares rose for seven straight trading days, rising 6.1% (+$1). It saw one of its worst periods between July 29, 2011 and August 8, 2011 when shares fell for seven straight trading days, falling 27.1% (-$6.78).

SanDisk Corporation (NASDAQ:SNDK) is among the top gainers as its shares are trading at $39.85, up $2.21 (+5.9%) from the previous close of $37.64. SanDisk Corp. is a multinational corporation, whose main focus is the design, development, manufacturing and marketing of flash memory card products. Its data-storage solutions include removable cards and universal serial bus (NYSE:USB) drives, which can be used in a wide gamut of consumer electronics products, such as digital cameras and mobile phones.

Stock Price Performance: From June 13, 2011, to September 7, 2011, the stock price had fallen $4.82 (-11.4%) from $42.45 to $37.63. The stock price saw one of its best stretches over the last year between April 18, 2011 and April 27, 2011 when shares rose for seven straight trading days, rising 9.2% (+$4.26). It saw one of its worst periods between August 15, 2011 and August 22, 2011 when shares fell for six straight trading days, falling 15.3% (-$5.83).

Micron Technology Inc. (NASDAQ:MU) is one of the top price gainers as its shares are trading at $6.46, up 41 cents (+6.7%) from the previous close of $6.06. Micron Technology is a global manufacturer and marketer of Flash memory, image sensors and other semiconductor components.

Stock Price Performance: From June 13, 2011, to September 7, 2011, the stock price had fallen $2.23 (-26.9%) from $8.29 to $6.06. The stock price saw one of its best stretches over the last year between January 28, 2011 and February 8, 2011 when shares rose for eight straight trading days, rising 10.3% (+$1.07). It saw one of its worst periods between May 31, 2011 and June 13, 2011 when shares fell for 10 straight trading days, falling 18.7% (-$1.91).

NCR Corporation (NYSE:NCR) is among the top gainers as its shares are trading at $17.38, up 75 cents (+4.5%) from the previous close of $16.63. NCR Corporation is a global technology company provides solutions for industries including financial services, retail and hospitality, travel and gaming, healthcare and public sector, entertainment and software and technology services.

Stock Price Performance: From July 12, 2011, to September 7, 2011, the stock price had fallen $1.86 (-10.1%) from $18.49 to $16.63. The stock price saw one of its best stretches over the last year between October 28, 2010 and November 5, 2010 when shares rose for seven straight trading days, rising 8.8% (+$1.20). It saw one of its worst periods between May 31, 2011 and June 10, 2011 when shares fell for nine straight trading days, falling 7.9% (-$1.54).

The stock price is up for athenahealth, Inc. (NASDAQ:ATHN), as shares are trading at $62.94, which is $3.87 (+6.5%) higher than the previous close of $59.08.

Stock Price Performance: From June 13, 2011, to September 7, 2011, the stock price had risen $19.81 (50.4%) from $39.27 to $59.08. The stock price saw one of its best stretches over the last year between June 30, 2011 and July 8, 2011 when shares rose for six straight trading days, rising 14.2% (+$5.83). It saw one of its worst periods between August 15, 2011 and August 19, 2011 when shares fell for five straight trading days, falling 10% (-$5.53).

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