The cloud-computing market is set to double to $116 billion by 2021 — these 3 charts show why that's

The cloud-computing market should continue to grow at a rapid pace in the coming years, Goldman Sachs said in a new report. But the market is already dominated by four big firms: Amazon, Microsoft, Google, and Alibaba. The opportunity for other players is rapidly closing, Goldman Sachs said. It's still early days in cloud computing, the hottest sector in the gigantic business-technology market. But the window of opportunity for companies to grab a piece of it is closing fast. That's...