Investors might want to bet on Arista Networks (ANET) , as it has been recently upgraded to a Zacks Rank #2 (Buy). This rating change essentially reflects an upward trend in earnings estimates -- one of the most powerful forces impacting stock prices.A company's changing earnings picture is at the core of the Zacks rating. The system tracks the Zacks Consensus Estimate -- the consensus measure of EPS estimates from the sell-side analysts covering the stock -- for the current and following years.Since a chan ...

Arista Networks (ANET) came out with quarterly earnings of $0.65 per share, beating the Zacks Consensus Estimate of $0.59 per share. This compares to earnings of $0.50 per share a year ago. These figures are adjusted for non-recurring items. Arista Networks shares have lost about 18.2% since the beginning of the year versus the S&P 500's decline of -3.9%. What's Next for Arista Networks? While Arista Networks has underperformed the market so far this year, the question that comes to investors' minds is: wha ...