Why Clovis Oncology Stock Is Taking a Step Backward Today

Shares of the small-cap cancer-treatment company Clovis Oncology (NASDAQ: CLVS) are having a rather volatile session today. As of 11:05 a.m. ET Thursday morning, Clovis' stock was only down by 2%. What's causing Clovis' stock to move against the broader upward trend in biotech today?