Early Decliners: ARM Holdings plc (ADR) (NASDAQ:ARMH), Yandex NV (NASDAQ:YNDX), American Airlines Group Inc (NASDAQ:AAL), athenahealth (NASDAQ:ATHN)

Sanford C. Bernstein upgraded shares of ARM Holdings plc (ADR) (NASDAQ:ARMH) from an underperform rating to a market perform rating in a research report sent to investors on Tuesday morning. ARM Holdings plc (ADR) (NASDAQ:ARMH) stock opened today at $49.32 and is currently trading at $49.84. The stock showed a positive weekly performance of 0.51%.

Yandex NV (NASDAQ:YNDX) was started as a government search system initially, and became the biggest search engine of Russia. The Amsterdam-based company had nearly 62% of the country’s market share in February, followed by global search giant Google Inc. (GOOGL) with a 26% share. Yandex NV (NASDAQ:YNDX) stock opened at $29.77, in current trading session and currently is at $29.40, by loosing -1.84%.The 52 week range of $19.93-$45.42.Company’s market capitalization is $10.19 billion.

On Thursday, April 24, 2014, American Airlines Group Inc (NASDAQ:AAL) will be releasing its Q1 FY 2014 earnings report. American Airlines Group Inc (NASDAQ:AAL) stock is currently trading at $35.22.The EPS of the stock is -7.81. Company’s market capitalization is $16.61 billion.

athenahealth, Inc (NASDAQ:ATHN) was upgraded to “hold” from “underperform” by Jefferies Monday. athenahealth, Inc (NASDAQ:ATHN) stock opened the session at $139.99, and now is at $138.92. The 52 week range of the ATHN stock remained $82.01-$206.70 and the day range was $137.00-$144.18.