Deal Geometries & Synergies
When firms combine, a merger fuses two into one, while an acquisition is one buying control of another. The economic logic rests on synergy: the combined firm must outvalue the separate parts.
Synergies split into cost savings (shared logistics, reliable) and revenue gains (cross-selling, often over-promised).
| Type | Combines with | Main gain | Main risk |
|---|---|---|---|
| Horizontal | Competitor | Scale, share | Antitrust |
| Vertical | Supply chain | Secured supply | Rigidity |
| Conglomerate | Unrelated | Diversification | Weak synergy |
Why Deals Fail
The acquirer must pay a premium over the target's market price to win control. Value is created for the acquirer only if:
Half of all M&A destroys value due to the winner's curse: the most optimistic bidder wins, and overpays.
Pitfall: Treating revenue synergies like cost synergies. Eliminated warehouses are real; cross-selling often evaporates.
Rule: Cap the premium below cold synergy value, and walk away when bidding passes the line.