At first blush, Chinese e-commerce enterprise JD.com, Inc. (NASDAQ:JD) seems to have cast a dark shadow over bullish investors. For one thing, the performance of JD stock hasn't been all that great, losing more than 13% on a year-to-date basis. Difficulties in U.S.-China trade relations impose a harsh light on the business. If that weren't enough, unusual options activity apparently points the forward trajectory in the wrong direction.Just hours ago, deep-pocketed investors — commonly known as whales — appe ...