eBay Can Rally Higher on Online Advertising Momentum

eBay shares rallied 24.4% year-to-date, outpacing the S&P 500's 7.9%. First-quarter revenue hit $3.1 billion, up 19% year over year, with online ad revenue surging 31.4% to $581 million, now nearly 20% of total revenue. Higher-margin ads can boost future profits.