Subjectivity

Fair value is based on assumptions. Any changes to growth or multiplier assumptions can greatly alter the ultimate valuation. Fundamental analysts are generally aware of this and use sensitivity analysis to present a base-case valuation, an average-case valuation and a worst-case valuation. However, even on a worst-case valuation, most models are almost always bullish, the only question is how much so. The chart below shows how stubbornly bullish many fundamental analysts can be.