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

NEW YORK (

TheStreet

) --

CHANGE IN RATINGS

TD Ameritrade

(AMTD) - Get Report

rated new Neutral at UBS. $23 price target. Company is a market leader, but appears fully valued at current levels.

Babcock & Wilcox

(BWC)

downgraded at Keybanc from Buy to Hold, Keybanc said. Valuation call.

Babcock & Wilcox

(BWC)

numbers raised at Goldman. Shares of BWC now seen reaching $34, according to Goldman Sachs. Estimates also increased, given higher emissions control demand. Neutral rating.

Cognex

(CGNX) - Get Report

upgraded at Piper from Neutral to Overweight, Piper Jaffray said. $34 price target. Stock has pulled back 24% since earnings.

Coventry Health

( CVH) upgraded at Stifel to Buy. Estimates also raised, as the company is seeing lower medical costs. $38 price target.

Discovery Communications

(DISCA) - Get Report

initiated at Credit Suisse with a $45 price target and Neutral rating. Pure play cable programmer with faster than average top line growth, Credit Suisse said.

General Growth Properties

(GGP)

upgraded at Credit Suisse to Outperform from Neutral. Best positioned for the CMBS recovery, Credit Suisse said. Maintain $18 price target.

Nalco

( NLC) upgraded at JP Morgan from Neutral to Overweight, JP Morgan said. Valuation call, based on a $30 price target. Stock is down 20% this year, largely because of the Berkshire overhang.

Olin

(OLN) - Get Report

upgraded at UBS from Sell to Neutral, UBS said. $19 price target. JV acquisition is a good strategy.

PPL

(PPL) - Get Report

estimates upped at Morgan Stanley through 2013, Morgan Stanley said. Overweight rating and $28 price target.

PPL

(PPL) - Get Report

upgraded at FBR from Market Perform to Outperform, FBR Capital Markets said. $29 price target. Stock has pulled back, even though the recent acquisition should add to earnings.

Taubman Centers

(TCO) - Get Report

downgraded at Credit Suisse to Neutral from Outperform. Valuation call, Credit Suisse said. Maintain $39 price target.

UnitedHealth

(UNH) - Get Report

upgraded at Stifel to Buy. $56 price target. Estimates also boosted, because of lower expected medical costs.

United Rentals

(URI) - Get Report

rated new Buy at Goldman. Company is in the early stages of a pricing recovery and can deliver above-average earnings growth.

Wellpoint

(WLP)

upgraded at Stifel to Buy. $85 price target. Business fundamentals are improving.

Watts Water

(WTS) - Get Report

upgraded at BB&T to Buy, BB&T Capital said. $47 price target. End-market demand will eventually come around and drive above-average growth.

This article was written by a staff member of TheStreet.