7 at-risk oil stocks that may go boom before bust By: CNBC.com News April 22, 2015 at 08:00 AM EDT The crash in oil prices stresses energy company balance sheets. Here are 7 big oil companies with high bankruptcy risk based on the Altman Z-score. Read More >> Related Stocks: Anadarko Petroleum Apache Corp Chesapeake Energy Crescent Pt Energy ML DEPOSITOR PREFERREDPLUS 8.375 CITIZENS COMMUN CERT. CZN-1 Petrobras - Petroleo Brasileiro S.A. Royal Dutch Shell Cl B ADR Southwestern Energy