Shares of cloud-based communications specialist 8x8 (NASDAQ: EGHT) fell as much as 30% on Friday morning, following the company's release of disappointing results for the first quarter of fiscal year 2018. As of 11:27 a.m. EDT, 8x8 shares had recovered to a milder 12% drop.8x8's first-quarter sales rose 15% year over year, landing at $69.1 million and slightly ahead of Wall Street's $68.6 million consensus estimate.