Sierra Oncology, Inc. is a risky bet given it's low Altman Z-score. Companies with a low Altman Z-score have a higher chance of going bankrupt within the next 2 years. Sierra Oncology, Inc. could be a weak company given it's low Piotroski F-score. The momentum for this stock is not very good. Sierra Oncology, Inc. is not a good value stock. Sierra Oncology, Inc. is not very popular among insiders. Tradey thinks it is not wise to invest in Sierra Oncology, Inc..