Equity Briefing: Upgrades and Downgrades for August 14th: ARMH, ARW, AV, AVT, CYOU, DEG, DRTX, ELN, ENVI

A number of stocks were upgraded and downgraded by equities research analysts today, as reported by Analyst Ratings Network (http://bit.ly/arndailyr) and Equity Briefing:

Evercore Partners  initiated coverage on shares of ARM Holdings plc ARMH. They issued an overweight rating on the stock.

Credit Agricole  initiated coverage on shares of Arrow Electronics, Inc. ARW. They issued an outperform rating on the stock.

Canaccord Genuity  downgraded shares of Aviva Plc AV from a buy rating to a hold rating.

Credit Agricole  initiated coverage on shares of Avnet, Inc. AVT. They issued an outperform rating on the stock.

Citigroup  initiated coverage on shares of Changyou.com Ltd CYOU. They issued a buy rating on the stock and set a $32.90 price target.

Citigroup  upgraded shares of Delhaize Group DEG from a neutral rating to a buy rating.

Credit Suisse  initiated coverage on shares of Durata Therapeutics Inc DRTX. They issued an outperform rating on the stock.

UBS AG  upgraded shares of Elan Corp. ELN from a neutral rating to a buy rating.

Goldman Sachs  downgraded shares of Envivio Inc ENVI from a buy rating to a neutral rating.

Deutsche Bank  downgraded shares of Envivio Inc ENVI from a buy rating to a hold rating.

Stifel Nicolaus  lowered its price target on shares of Envivio Inc ENVI from $12.00 to $6.00. They have a buy rating on the stock.

William Blair  downgraded shares of Envivio Inc ENVI from an outperform rating to a market perform rating.

Stifel Nicolaus  downgraded shares of Expedia, Inc. EXPE from a buy rating to a hold rating.

Citigroup  initiated coverage on shares of Giant Interactive Group GA. They issued a buy rating on the stock and set a $5.80 price target.

Citigroup  initiated coverage on shares of Shanda Games GAME. They issued a neutral rating on the stock.

Sidoti  downgraded shares of Gardner Denver GDI from a buy rating to a neutral rating.

Stifel Nicolaus  downgraded shares of Global Payments Inc. GPN from a buy rating to a hold rating.

Benchmark Co.  downgraded shares of Groupon GRPN from a buy rating to a hold rating. Their analysts now have a $7.00 price target on the stock, down previously from $20.00.

Citigroup  downgraded shares of Groupon GRPN from a buy rating to a neutral rating.

JPMorgan Chase  initiated coverage on shares of Huntington Ingalls HII. They issued a neutral rating on the stock.

Credit Agricole  initiated coverage on shares of Ingram Micro Inc. IM. They issued an underperform rating on the stock.

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