M&A needn't be a loser's game.

Three out of four acquisitions fail; they destroy wealth for the buyer's shareholders, who end up worse off than they would have been had the deal not been done. But it doesn't have to be that way, argue the authors. In evaluating acquisitions, companies must look beyond the lure of profits the income statement promises and examine the balance sheet, where the company keeps track of capital. It's ignoring the balance sheet that causes so many acquisitions to destroy shareholders' wealth. Unfortunately, most executives focus only on sales and profits going up, never realizing that they've put in motion a plan to destroy their company's true profitability--its return on invested capital. M&A, like other aspects of running a company, works best when seen as a way to create shareholder value through customers. Some deals are sought to help create better value propositions for the business or to better execute current strategies--or to block competitors from doing these things. But most deals are about customers and should start with an analysis of customer profitability. Some customers are deliciously profitable; others are dismal money losers. The better an acquirer understands the profitability of its own customers, the better positioned it will be to perform such analyses on other companies. In this article, the authors show that customer profitability varies far more dramatically than most managers suspect. They also describe how to measure the profitability of customers. By understanding the economics of customer profitability, companies can avoid making deals that hurt their shareholders, they can identify surprising deals that do create wealth, and they can salvage deals that would otherwise be losers.