Ebay Inc. announced that it has partnered with Spring, an online retailer selling men's, women's and lifestyle items, for an online boutique offering brands like Chloe, David Yurman and Rag & Bone. Spring will have a dedicated "storefront" on eBay's site. Ebay has 171 million active buyers and, according to the company, 81% of merchandise sold on the site is new. The partnership comes at a time when Amazon.com Inc. is beefing up its online fashion offerings with private labels and partnerships with companies like Nike Inc. . Ebay shares are nearly flat in Thursday premarket trading, and up almost 29% for the year so far. The S&P 500 index is up 11.6% for 2017 to date.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.