US Stocks Movement | Arista falls 9% pre-market as Q2 adjusted operating margin guidance misses expectations

```htmlGolden Ten Data May 6｜The "switch leader" and network equipment manufacturer Arista (ANET.US) is down 9.06% in pre-market trading, at $154.79. In terms of news, Arista's first-quarter revenue was $2.71 billion, and adjusted earnings per share were $0.87, both beating Wall Street expectations. However, Arista expects its second-quarter adjusted operating profit margin to be 46% to 47%—this range is lower than the 48.8% in the same period last year and also lower than the 47.8% in the most recent quarter. Some analysts pointed out that in the context of high expectations, any news that is "not surprising enough," or even guidance that simply meets expectations, is enough to trigger a selloff.```