Adaptive Biotechnologies Corporation (NASDAQ:ADPT) shares are trading higher despite no company-specific news. The shares spiked just before the market close on Monday and continued to rise on Tuesday on heavy trading volume. More than 2.64 million shares have been traded in the session, compared to the stock's 100-day average of 1.179 million shares. 9.24% of available ADPT shares are being sold short, and the ticker is listed as one of the top trending on Yahoo! Finance.