Editor's Note: Green and red arrows refer to intraday stock price movement.

NEW YORK (

TheStreet

) --

CHANGE IN RATINGS

Essex Property Trust

(ESS) - Get Report

upgraded at Credit Suisse to Neutral from Underperform as 2011 headwinds should improve in 2012, Credit Suisse said. Price target improved to $110 from $96.

3M

(MMM) - Get Report

upgraded at BofA/Merrill to Neutral from Underperform as it could benefit from rotation into defensive names, Bank of America/Merrill Lynch said. Estimates raised through 2012. Price target increased to $106 from $93.

Prudential

(PRU) - Get Report

added to Conviction Buy list at Goldman. PRU shares being added to the America's Conviction Buy List. Value in PRU's market share-leading annuity business as risks have decreased, Goldman Sachs said.

Spectra

(SE) - Get Report

downgraded at Goldman to Neutral from Buy. Valuation call, Goldman Sachs said.

StanCorp

(SFG)

downgraded at Goldman to Sell from Neutral on seasonal weakness, Goldman Sachs said.

This article was written by a staff member of TheStreet.