Each business day, TheStreet.com Ratings updates its ratings on the stocks it covers. The proprietary ratings model projects a stock's total return potential over a 12-month period, including both price appreciation and dividends. Buy, hold or sell ratings designate how the Ratings group expects these stocks to perform against a general benchmark of the equities market and interest rates. While the ratings model is quantitative, it uses both subjective and objective elements. For instance, subjective elements include expected equities market returns, future interest rates, implied industry outlook and company earnings forecasts. Objective elements include volatility of past operating revenue, financial strength and company cash flows. However, the rating does not incorporate all of the factors that can alter a stock's performance. For example, it doesn't always factor in recent corporate or industry events that could affect the stock price, nor does it include recent technology developments and competitive dynamics that may affect the company. For those reasons, we believe a rating alone cannot tell the whole story, and that it should be part of an investor's overall research. The following ratings changes were generated on July 11. Corus Entertainment ( CJR) recently was upgraded to buy from hold. This upgrade is driven by a number of strengths, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. Corus operates as a media and entertainment company in Canada. CJR has improved earnings per share by 32.4% in the most recent quarter compared with the same quarter a year ago. The company has demonstrated a pattern of positive earnings per share growth over the past two years. During the past fiscal year, Corus Entertainment increased its bottom line by earning $1.24 versus 41 cents in the prior year. The net income growth from the same quarter one year ago has greatly exceeded that of the S&P 500 but is less than that of the Media industry average. The net income increased by 27.3% when compared with the same quarter one year prior, rising from $29.59 million to $37.67 million.