Most E-Commerce Froth Since 2000 Stirs Up Investor Doubts

Most E-Commerce Froth Since 2000 Stirs Up Investor Doubts

Chris Ratcliffe/Bloomberg

Inventory and shipping costs make new businesses hard to build, and those that do attract shoppers can quickly fall prey to clones. That makes it tough for new companies to vie with stalwarts EBay and Amazon.com Inc. in the $226 billion online-retail market.