Pfizer currently trades at a forward price-to-earnings ratio (P/E) of approximately 8.6x. To understand how affordable this is, you must compare it to the competition. The average company in the pharmaceutical sector trades at a multiple of 15x to 20x earnings. High-growth competitors like Eli Lilly (NYSE: LLY) trade at multiples significantly higher than that.For value investors, the argument for Pfizer is grounded in simple mathematics. The market is currently pricing the company as if its earnings will p ...