VIVUS (VVUS) (ENOC) (ERF) (CBOE) (GBNK) (GHL) Ratings, Price Targets

VIVUS, Inc. (NASDAQ: VVUS), EnerNOC, Inc. (NASDAQ: ENOC), Enerplus Resources Fund (NYSE: ERF), CBOE Holdings, Inc. (NASDAQ: CBOE), Guaranty Bancorp (NASDAQ: GBNK) and Greenhill & Co., Inc. (NYSE: GHL) ratings and price targets.

VIVUS, Inc. (VVUS) was downgraded by Roth Capital from a “buy” rating to a “neutral” rating.

EnerNOC, Inc. (ENOC) was upgraded by Piper Jaffray (NYSE:PJC) from a “neutral” rating to an “overweight” rating.

Enerplus Resources Fund (ERF) was upgraded by Zacks Investment Research from an “underperform” rating to a “neutral” rating.

CBOE Holdings, Inc. (CBOE) was downgraded by Macquarie from an “outperform” rating to a “neutral” rating.

Guaranty Bancorp (GBNK) was downgraded by Zacks Investment Research from a “neutral” rating to an “underperform” rating.

Greenhill & Co., Inc. (GHL) was downgraded by Zacks Investment Research from a “neutral” rating to an “underperform” rating.