Charlotte,NC-Based Utility Co Duke Energy's Most Important Financial Issue is That Its Balance Sheet Showed a Reduction in Its Deferred Income Tax Liabilities in 2017 of $7.534 Bil, Going From $14.155 Bil at Dec 31, 2016 to $6.621 Bil at Dec 31, 2017 (What Caused It? and What Does It Mean to Its Utility Customers?) and Duke Energy Doesn't Mention a Word About It In Its Just Released 4Q 2017 Earnings Release