Hold on to your smartphone — the holiday price wars between Walmart Inc. and Amazon.com Inc. are heating up. Walmart, the world's largest retailer, has introduced a program to temporarily lower the price consumers pay for some items on its marketplace site, where third-party vendors ...

Paul Polman, CEO of margarine maker Unilever, has criticized butter in the past, saying the dairy fat "kills." With sales of the company's spreads sagging, he is now embracing it. In what Unilever Foods President Antoine de Saint-Affrique calls a "fundamental turnaround" of a $4.8 ...