The Context
In December 2017, Disney announced it would acquire the majority of 21st Century Fox's entertainment assets for $52.4 billion in stock. Six months later, Disney had raised its offer to $71.3 billion — and the deal completed in March 2019, some fifteen months after the original announcement. The $18.9 billion gap is a case study in how the Zone of Possible Agreement changes dynamically.
The ZOPA at the Opening
Disney's opening position at $52.4B was below Fox's reservation price — which is why it wasn't immediately accepted. Fox's reservation price was shaped by their BATNA: the option to remain independent. Disney's ceiling — the highest they'd pay before the deal stopped making strategic sense for Disney+ — was likely $75–80B, given the streaming value of Fox's content library.
Wide ZOPA. Disney opened below Fox's floor with a standard anchor.
Comcast Enters: The ZOPA Shifts
| Event | Fox's reservation price | Disney's position | ZOPA |
|---|---|---|---|
| Dec 2017: Disney at $52.4B | ~$55B (below this) | Ceiling ~$75–80B | Wide but Fox's floor not met |
| Jun 2018: Comcast at $65B cash | Rises sharply — concrete alternative now exists | Must compete | ZOPA shifts upward dramatically |
| Jun 2018: Disney at $71.3B | Satisfied — closes above floor | Inside ceiling | Deal closes in new ZOPA |
Why Fox Chose the Lower Offer
Comcast's cash offer was nominally higher. Fox chose Disney anyway. Standard ZOPA analysis ends here — but the real lesson is in the risk-adjusted comparison.
Higher number, higher uncertainty
Comcast's concurrent NBCUniversal pursuit created significant antitrust risk in US and EU. Completion probability: ~60–65%. Risk-adjusted value: ~$42B.
Lower number, higher certainty
Disney's regulatory pathway was cleaner. Relationship investment over 12+ months reduced uncertainty discount. Completion probability: ~90%+. Risk-adjusted value: ~$64B.
Plus: Murdoch's non-financial BATNA components — cultural stewardship of Fox content, and 12 months of relationship capital Iger had built — tipped the comparison decisively toward Disney.
The Relationship-Building Premium
Bob Iger spent approximately 12 months meeting with Rupert Murdoch before Disney made a formal offer. Dinners, conversations, alignment on values and content legacy. When Comcast entered with a higher cash offer, Murdoch chose Disney anyway.
The preference gap — approximately $6 billion in the bid comparison — was partly the product of 12 months of relationship investment that reduced the uncertainty discount Fox applied to the Disney deal.
Relationship investment before a negotiation is price-relevant. It changes the risk-adjusted value your counterpart places on your offer. That is not a soft observation — it changes the numbers.
Teaching Notes
Discussion Questions
Map the Disney-Fox ZOPA at three points: December 2017, June 2018, June 2018 (shareholders approved in July). How much of the $18.9B shift was driven by Comcast's entry vs the relationship investment Disney had made?
In procurement or M&A: your supplier or target has a competing offer that is $X higher than yours. What is the calculation that determines whether you can win without matching the number?
Design a 12-month relationship-building programme for the most important upcoming negotiation in your organisation. What specific investments, in what sequence, would change the counterpart's uncertainty discount on your offer?
Key Concepts Illustrated
ZOPA Dynamics • BATNA Change Affecting ZOPA • Risk-Adjusted Offer Comparison • Relational Value as Price-Relevant • Competing Bid Response Strategy
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