Houston, TX-Based Oil & Gas Co Occidental Petroleum (OXY) Generated 4Q 2017 After-Tax Net Income of $497 Mil ....................................................................................... $474 Mil, or 95% of OXY's 4Q 2017 Net Income of $497 Mil Was What OXY Called "Benefits Recognized Due to Change in Federal Tax Law and Tax Rate": We'll Have to Wait Until OXY Files Its 2017 Annual Report 10-K To Get a Better Understanding of Precisely What That Means