Wal-Mart's next move against Amazon: More warehouses, faster shipping

People talk outside a Wal-Mart Pickup-Grocery test store in Bentonville, Arkansas, in this file photo taken June 4, 2015. REUTERS/Rick Wilking/Files

CHICAGO: Wal-Mart Stores Inc is accelerating its investment in e-commerce in a bid to narrow the gap with Amazon.com Inc and to give it an even more dominant position against the rest of the field in retail. 

The world's largest retailer is now on track to double the number of giant warehouses dedicated to online sales to 10 by the end of 2016, according to Justen Traweek, vice-president of e-commerce supply chain and fulfilment.