Amazon forecasts lower operating income, shares dip

Amazon.com Inc forecast a greater-than-expected dip in operating income for the current quarter, a sign of its dedication to building expensive new warehouses and creating video content. The world's largest online retailer also reported lower-than-expected fourth-quarter revenue and missed Wall Street targets for its closely watched cloud computing unit, sending its shares down more than 4 percent in extended trading on Thursday. Key to its plan is to entice sign-ups for Amazon Prime, its $99-pe