Petroleum Development Corporation (NASDAQ: PETD) was today upgraded by Global Hunter Securities from Neutral to Buy with a price target of $30. Petroleum Development Corporation (NASDAQ: PETD) is now trading at $19.71, 0.35% down.

Capstone Turbine Corporation (NASDAQ: CPST) was today upgraded by Ardour Capital from Hold to Accumulate at a price target in the range of $1-$1.50. Now Capstone Turbine is down 2.52% at $1.16. Capstone Turbine climbed up by 61% in the last six months.

Standard Motor Products, Inc. (NYSE: SMP) climbed 1.02% at $8.90 on 366K shares. Today Standard Motor was upgraded to Buy from Hold by BB&T Capital Mkt at a price target of $11. So far this year, SMP gained 157%.

Health Management Associates, Inc. (NYSE: HMA) increased 4.97% to $6.33 after HMA was upgraded from Hold to Buy by Argus at a price target of $10.

Robert Half International Inc. (NYSE: RHI) was upgraded by Deutsche Securities today from Sell to Hold. Price target increased from $23 to $26. Now RHI is down 0.66% at $24.20.

Below are interesting low-cap stocks on the NYSE and NASDAQ that have lowest PEG ratio.

Standard Motor Products Inc (NYSE: SMP) has a PEG ratio of 0.08 and has a market capitalization of $167.7 million. SMP shares are trading significantly short of their 52-week high of $15.71.

American Dairy Inc (NYSE: ADY) has a PEG ratio of 0.11 and has a market capitalization of $569.1 million. ADY shares are trading significantly short of their 52-week high of $44.00.