ProLogis (PLD) (AVAV) (DGX) (MDU) (SORL) (VR) All Downgraded

ProLogis (NYSE: PLD), AeroVironment (NASDAQ: AVAV), Quest Diagnostics Inc (NYSE: DGX), MDU Resources Group, Inc. (NYSE: MDU), Sorl Auto Parts, Inc. (NASDAQ: SORL) and Validus Holdings, Ltd. (NYSE: VR) downgraded by analysts.

AeroVironment (AVAV) was downgraded by Raymond James (NYSE:RJF) from an “outperform” rating to a “market perform” rating.

Quest Diagnostics (DGX) was downgraded by RBC Capital from an “outperform” rating to a “sector perform” rating. They have a price target of $61.00 on the company, down from $67.00.

MDU Resources Group, Inc. (MDU) was downgraded by Citigroup (NYSE:C) from a “buy” rating to a “hold” rating.

ProLogis (PLD) was downgraded by Jefferies (NYSE:JEF) from a “hold” rating to an “underperform” rating.

Sorl Auto Parts, Inc. (SORL) was downgraded by Oppenheimer from an “outperform” rating to a “perform” rating.

Validus Holdings, Ltd. (VR) was downgraded by Stifel Nicolaus from a “buy” rating to a “hold” rating.

Ratings on (PETD) (PFCB) (SCHN) (VR) Upgraded

Ratings on shares of Petroleum Development Co. (NASDAQ: PETD), P.F. Chang’s China Bistro (NASDAQ: PFCB), Schnitzer Steel (NASDAQ: SCHN) and Validus Holdings, Ltd. (NYSE: VR) upgraded by analysts.

Credit Suisse (NYSE:CS) upgraded Petroleum Development Co. (PETD) from a “neutral” rating to an “outperform” rating. They have a price target of $42.00 on the company.

Raymond James (NYSE:RJF) upgraded P.F. Chang’s China Bistro (PFCB) from a “market perform” rating to an “outperform” rating.

Credit Agricole upgraded Schnitzer Steel (SCHN) to an “outperform” rating.

Stifel Nicolaus upgraded Validus Holdings, Ltd. (VR) from a “hold” rating to a “buy” rating. They have a price target of $40.00 on the company.