These stocks are down on high volume today:

  • Advance Auto Parts (AAP) is seeing its price fall on above-normal volume today, as 4.5 million shares have moved, or 4.2 times its average daily volume. The stock price has dropped 14% to $70.61. The stock has been losing steam over the last month, sinking $20.07 (-22.1%) from a price of $90.68 on April 18, 2012. The stock has moved down across its 200-day moving average of $79.55 today.

  • AutoZone (AZO) is trading down on a volume of 782,386, or 2.5 times its standard daily volume. At $366.07, shares are down 5.9%. Shares are down $19.66 (-5.1%) from a price of $385.73 on May 10, 2012. The stock has dropped a step closer to its 200-day moving average, sitting just 2% above the mark.

  • Dollar Tree (DLTR) is down on high volume today, trading with volume of 2.5 million, or 2.5 times its average daily volume. Trading at $96.25, the stock is down 5%. The stock has risen $8.24 (9.4%) over the last three months from a price of $88.01 on February 21, 2012. The stock is trading 7.4% above its 200-day moving average.

  • O'Reilly Automotive (ORLY) is trading down on above-normal volume today, seeing a price drop on a volume of 1.7 million, or 1.6 times its average daily volume. The stock price has sunk 6.8% to $95.04. Over the last three months, the stock has gained $10.58 (12.5%) from a price of $84.46 on February 21, 2012. The stock is trading 8.8% above its 200-day moving average.

  • Kirby Corporation (KEX) is trading down on a volume of 2.5 million, or 4.9 times its standard daily volume. Shares are off 7.6% to $56.38. The stock has been dipping in the last two months, down $11.95 (-17.5%) from a price of $68.33 on March 20, 2012. The stock is trading at 87.5% of its 50-day moving average and 87.2% of its 200-day moving average.

  • GameStop (GME) is trading down on a volume of 5.9 million, or 1.8 times its normal daily volume. The stock is down 9.9% to $18.78. Shares are down over the last two months as the price has dropped $5.23 (-21.8%) from a price of $24.01 on March 20, 2012. The stock is trading at 85.4% of its 50-day moving average and 81% of its 200-day moving average.

  • Trading at a volume of 1.4 million, or 1.7 times its average daily volume, Martin Marietta Materials (MLM) is down on high volume today. The stock price is $67.81, reflecting a 1.2% decrease. The stock is down over the last two months, having fallen $20.42 (-23.1%) from a price of $88.23 on March 20, 2012. The stock is trading at 83.3% of its 50-day moving average and 84.6% of its 200-day moving average.

  • Liquidity Services (LQDT) is trading down on above-average volume today, seeing a price drop on a volume of 1.1 million, or 1.7 times its average daily volume. The stock price has dropped 8.7% to $56.42. Share price went up over the last three months, now up $13.42 (31.2%) from $43 on February 21, 2012. The stock has dropped a step closer to its 50-day moving average, sitting just 2.6% above the mark.

  • Douglas Emmett (DEI) is trading down on above-normal volume today, seeing a price drop on a volume of 1.7 million, or 1.9 times its average daily volume. Shares are off 2.7% to $21.95. Shares are down, having dropped $1.25 (-5.4%) from a price of $23.19 on May 10, 2012. The stock is trading 5.1% above its 200-day moving average.