By: Susan C. Morse, Eric W. Orts
In M&A, an acquirer must pay an acquisition premium to target shareholders. However, much to academic puzzlement, this universal reality rubs against theory. Two fundamental ideas in modern financial economics are the efficient capital market hypothesis (ECMH) and the capital asset pricing model (CAPM). Together, they tell us: (1) an efficient market incorporates into the stock price all public information and thus all factors of value except private information, (2) the intrinsic value of a firm is the discounted, per CAPM, future free cash flow, (3) thus, stock price and intrinsic value should be tethered, albeit stock price can be “noisy.” Accepting these truths in the main, what accounts for the universal fact that an acquirer always pays a premium when the stock price is said to be “right”? The academic and practical answer is found in the theory of the firm and Coase's error. The theoretical answer has a practical implication on Delaware merger rules.




