Bloomberg Walmart Inc. agreed to buy a controlling stake in India’s biggest online retailer, striking a blow against rival Amazon.com Inc. as the battle for e-commerce supremacy goes global. The world’s largest retailer will acquire a 77 percent holding in Flipkart Group for $16 billion, the companies said in a statement. Flipkart co-founder Binny Bansal and other shareholders will hold …

Bloomberg WestJet Airlines Ltd. dropped the most in more than two and a half years after it said increased spending to create a new low-cost unit and expand overseas will vastly exceed revenue growth. Costs for each seat flown a mile, excluding fuel and employee profit sharing, will climb as much as 8.5 percent this quarter, Canada’s second-biggest carrier said. …

Bloomberg JD.com Inc. reported quarterly profit that fell short of analyst expectations as the Chinese online shopping giant ramps up the construction of physical shops and warehouses amid rising competition from Alibaba Group Holding Ltd. Adjusted earnings-per-share were 11 cents in the three months ended March, missing the 0.81 yuan average of analyst estimates. While sales for the quarter rose …