Today, these stocks are down on high volume:

  • Trading at a volume of 15.8 million, or 2.7 its average daily volume, Caterpillar (CAT) was down on high volume today. Shares were down 4.6% to $103.44. Shares are down over the last two months as the price has dropped $12.19 (-10.5%) from a price of $115.63 on February 27, 2012. The stock has dropped a step closer to its 200-day moving average, sitting just 2.1% above the mark.

  • National-Oilwell Varco (NOV) was trading down on above-average volume with 7.1 million shares moving, or 2.3 its average daily volume. Shares dropped 1.5% to $76.83. The stock has been sinking in the last two months, down $8.40 (-9.9%) from a price of $85.23 on February 27, 2012. The stock has dropped a step closer to its 200-day moving average, sitting just 2.9% above the mark.

  • Lorillard (LO) experienced a price drop on above-average volume today, with 2.6 million shares, or 2.7 its average daily volume, changing hands. Shares fell 3.9% to $129.53. Share price increased over the last three months, now up $22.05 (20.5%) from $107.48 on January 27, 2012. The stock is trading 7.2% above its 200-day moving average.

  • Trading at a volume of 4.2 million, or 2.7 its average daily volume, Rockwell Automation (ROK) was down on high volume today. At $75.52, the stock price has fallen 2.4%. The stock has been losing steam over the last month, dropping $5.95 (-7.3%) from a price of $81.47 on March 26, 2012. The stock has dropped a step closer to its 200-day moving average, sitting just 0.1% above the mark.

  • Petroleo Brasileiro (PBR.A) was trading down on above-average volume with 12.1 million shares moving, or 2.2 its average daily volume. Closing at $22.34, shares slipped 1%. Over the last three months, the stock has lost $6.32 (-22.1%) from a price of $28.66 on January 27, 2012. The stock is trading at 89.2% of its 50-day moving average and 87.4% of its 200-day moving average.

  • Parker-Hannifin Corporation (PH) experienced a price drop on above-average volume today, with 2.8 million shares, or 1.8 its average daily volume, changing hands. With a closing price of $87.08, shares dropped 1%. Share price is up 11 cents (0.1%) from $86.97 on March 26, 2012. The stock has dropped a step closer to its 50-day moving average, sitting just 2.2% above the mark.

  • General Dynamics Corporation (GD) saw its price drop on above-normal volume today, as 3.7 million shares have changed hands or 2.4 times its average daily volume. Shares fell 3.6% to $67.56. The share price has been decreasing in the last month, down $6.35 (-8.6%) from $73.91 on March 26, 2012. The stock has moved down across its 200-day moving average of $68.17 today.

  • GlaxoSmithKline plc (GSK) was down on high volume after trading at a volume of 4.8 million, or two its average daily volume. Shares were down 2.6%, closing at $46. The stock has been on an upward trajectory over the last two months, increasing $1.47 (3.3%) from a price of $44.53 on February 27, 2012. The stock has dropped a step closer to its 50-day moving average, sitting just 1.1% above the mark.

  • Host Hotels and Resorts (HST) was trading down on above-average volume with 12.8 million shares moving, or 1.7 its average daily volume. The stock price dropped 1% to $16.61. Shares have shown some positive movement over the last two months as the price has climbed 58 cents (3.6%) from a price of $16.03 on February 27, 2012. The stock has dropped a step closer to its 50-day moving average, sitting just 2.5% above the mark.