New York University finance professor Aswath Damodaran, who literally wrote the book on valuation, recently used two different approaches that rely on each of GE’s division’s past operating income and the multiples of close peers to arrive at per-share values of $11.84 or $10.92 a share. It was an exercise not without frustration.

“I have always described my vision of hell as having to value GE over and over and over again, for eternity,” he wrote.

Wall Street Journal, The Case for Buying GE (Yes, Really)