The High-Low Fallacy: Don’t Believe The Merger Hype

 | Sep 02, 2012 05:33AM ET

One of the biggest misconceptions in the investing world is that the merit of an acquisition should be judged by whether or not it is “earnings accretive”. The impact of an acquisition on a company’s accounting earnings is not indicative of its economic value to shareholders.

To illustrate the point, we turn to the so-called ‘high-low fallacy.’ This simple exercise shows the impact of combining two ‘businesses’—one with a high price/earnings multiple (P/E) and one with a low P/E—in a stock-for-stock deal. Assuming no acquisition premium or synergy between the operations, it can be demonstrated that management can either increase earnings—High buys Low—or increase the P/E—Low buys High.[1]

Figure 1 clearly demonstrates the simple math behind how acquisitions can be accretive without any consideration whatsoever to the economic impact of a deal.

Figure 1: The High-Low Fallacy