Fastenal Company, Quest Diagnostics Among Stocks Down on High Volume Thursday

Today, a few stocks are down on high volume:

• Fastenal Company (NASDAQ:FAST) traded on a volume of 6.1 million, or 2.2 its average daily volume, but its price was down. Closing at $48.87, shares slipped 1.5%. The share price has dropped $4.42 (-8.3%) from $53.29 on March 13, 2012. The stock is trading 7.9% above its 200-day moving average.

• Quest Diagnostics (NYSE:DGX) experienced a price drop on above-average volume today, with 2.6 million shares, or 3.2 its average daily volume, changing hands. With a closing price of $58.83, shares were off 1.2%. The stock has been dropping recently, and shares are down $2.25 (-3.7%) from a price of $61.08 on April 4, 2012. The stock is trading 3.8% above its 200-day moving average.

• Coinstar (NASDAQ:CSTR) was trading down on above-average volume with 1.4 million shares moving, or 2.3 its average daily volume. The stock price dropped 2.9% to $61.31. The stock is trading 15.1% above its 200-day moving average.

• Jazz Pharmaceuticals plc (NASDAQ:JAZZ) was down on high volume after trading at a volume of 1.8 million, or 2.2 its average daily volume. Closing at $44.64, shares were down 3.9%. The stock has been dipping in the last two months, down $5.09 (-10.2%) from a price of $49.73 on February 13, 2012. The stock has dropped a step closer to its 200-day moving average, sitting just 1.2% above the mark.

• United Therapeutics Corporation (NASDAQ:UTHR) was down on high volume after trading at a volume of 1.8 million, or 2.9 its average daily volume. Shares were down 3.1%, closing at $42.38. The stock has been on a downward trajectory over the last two months, sinking $6.88 (-14%) from a price of $49.26 on February 13, 2012. The stock is trading at 90.1% of its 50-day moving average and 92.8% of its 200-day moving average.

• CPFL Energia (NYSE:CPL) was trading down on above-average volume with 1.1 million shares moving, or 2.1 its average daily volume. Shares fell 1.7% to $29.57. The stock has been going in a negative direction over the last month, dropping $3.37 (-10.2%) from a price of $32.94 on March 13, 2012. The stock is trading 3.1% above its 200-day moving average.

• Cosan Limited (NYSE:CZZ) traded on a volume of 2.1 million, or 2.1 its average daily volume, but its price was down. The stock price declined 3.5%, closing at $14.14. The stock has risen $2.35 (19.9%) over the last three months from a price of $11.79 on January 13, 2012. The stock is trading 9.5% above its 200-day moving average.

• Mattress Firm (NASDAQ:MFRM) was down on high volume, trading with volume of 501,590, or 2.6 its average daily volume. With a closing price of $42.57, shares were off 3.2%.

• BreitBurn Energy Partners L.P (NASDAQ:BBEP) was down on high volume after trading at a volume of 849,772, or 2.5 its average daily volume. The stock price dropped 2.7% to $17.80. The stock has been losing steam over the last month, sliding $1.70 (-8.7%) from a price of $19.50 on March 13, 2012. The stock is trading at 93.2% of its 50-day moving average and 95.7% of its 200-day moving average.