Merger and Acquisition Motives (Synergy Hypothesis)

M&A and motive theories

Mergers and acquisitions (M&A) cover both mergers, in which two companies combine into one, and acquisitions, in which one company buys another's shares or assets to gain control. Acquirers usually pay a takeover premium above the market price, so the core question of motive theories is what justifies that premium. Trautwein (1990) organized the motives into net-gain, wealth-transfer and managerial perspectives. Legal review of anticompetitive combinations is covered in merger control.

The synergy hypothesis

The synergy hypothesis holds that the value of the combined firm (V_AB) exceeds the sum of the two firms' values (V_A+V_B), the "1+1>2" story.

• Operating synergy: economies of scale from integrating production, purchasing and logistics, economies of scope from shared distribution, and complementary resources such as technology and brands raise revenue or cut costs.
• Financial synergy: combining businesses with different cash flows lowers risk and raises debt capacity, and allows tax savings (using loss carryforwards) and internal capital markets. From the Modigliani–Miller perspective, however, shareholders can diversify on their own, so diversification alone creates no value.
• Managerial synergy: superior management skills transfer to the target and raise efficiency.

Other value-creating motives

• Replacing inefficient management: buying a poorly run, underpriced firm and changing its managers raises value. Manne's (1965) market for corporate control disciplines managers.
• Market power: horizontal mergers reduce competitors and increase pricing power. This benefits the firm but can reduce social welfare, so it is regulated.
• Buying undervalued firms: acquiring targets cheaply when the market misprices them.

Agency and hubris hypotheses

• Agency (managerialism) hypothesis: managers' pay, power and prestige grow with firm size, so they may pursue empire-building deals regardless of shareholder value. Jensen (1986) argued that firms with free cash flow and few good projects tend to spend it on value-destroying acquisitions instead of paying it out. See agency theory for background.
• Hubris hypothesis: Roll (1986) proposed that even without synergy, overconfident managers believe their valuations are right and overpay. Target shareholders' gains are then merely transfers from acquirer shareholders, a "winner's curse."

Evidence and implications

Many studies find large abnormal returns for target shareholders but near-zero or negative returns for acquirer shareholders. Berkovitch and Narayanan (1993) distinguished motives by the correlation between target gains and total gains: synergy dominated in deals with positive total gains and agency in deals with negative total gains, with hubris also present. Promised synergies often fail because of excessive premiums, culture clashes, poor post-merger integration (PMI) and the loss of key people.

See also: Strategic Alliances

References

1. Manne, H. G. (1965). Mergers and the market for corporate control. Journal of Political Economy, 73(2), 110–120.
2. Roll, R. (1986). The hubris hypothesis of corporate takeovers. Journal of Business, 59(2), 197–216.
3. Jensen, M. C. (1986). Agency costs of free cash flow, corporate finance, and takeovers. American Economic Review, 76(2), 323–329.
4. Trautwein, F. (1990). Merger motives and merger prescriptions. Strategic Management Journal, 11(4), 283–295.
5. Berkovitch, E., & Narayanan, M. P. (1993). Motives for takeovers: An empirical investigation. Journal of Financial and Quantitative Analysis, 28(3), 347–362.