He recently raised his rating on the stock to "buy" from "neutral."

Fitch raised its rating to A-minus earlier this year.

Goldman, Sachs, however, raised its rating on the retail sector.

Q. Why did you raise your rating on Yahoo to buy last week?

Gary Greenwood, an analyst at the broker, raised his rating on the company from "hold" to "sell".

As a rule, there is a price to be paid for going on the attack: it raises the attacking candidate's unfavorable rating.

Since the earnings release, four analysts have lowered their ratings on Sprint to hold from buy, and one analyst raised his rating.

Standard & Poor's raised its long-term rating for the museum as it benefited from the fundraising of its trustees.

Lehman Brothers raised its rating on the stock to a "strong buy" from "neutral."

On May 1, when the stock had risen to $6.05, Goldman raised its rating to "outperform."