©2015 Bloomberg News NOBABP6KLVR7 (Bloomberg) — Wal-Mart Stores Inc. will offer a $50-a-year unlimited free-shipping service for online customers starting this summer, seeking to challenge the $99 Prime service offered by retail rival Amazon.com Inc. The service will be available by invitation only in select markets, said Ravi Jariwala, a spokesman

 ©2015 Bloomberg News NZ27F36JIJUX (Bloomberg) — Emerging-market stocks fell for a fifth day, led by raw-material and energy producers, as crude prices plunged to the lowest since 2009 and Chinese trade data underscored concern that global growth is slowing. The Bloomberg Gulf Cooperation Council 200 Index tracking companies in the