1. Bulls have good reasons to love PFE, with attractive dividend yield and low P/E ratio being two of the frequently mentioned ones. 2. However, potential investors should consider the contradicting factors against the bullish sentiments. 3. The Graham P/E ratio suggests a valuation premium instead of a discount with PFE's bleak growth outlook. 4. PFE's elevated debt levels also suggest that simple accounting P/E ratios understate its current valuation risks.