Dexcom shares plummet 30% after company lowers fiscal year guidance

The Dexcom logo is seen on a smartphone screen and in the background.Shares of Dexcom tumbled more than 34% in after-hours trading Thursday after the diabetes management company reported disappointing revenue for the second quarter and offered weak guidance.Here's how the company did:Earnings per share: 43 cents adjusted vs. 39 cents expected by LSEGRevenue: $1 billion vs. $1.04 billion expected by LSEGDexcom's revenue increased 15% from $871.3 million a year earlier, according to a release. The company rep ...