Final answer:
The overall expected payoff to Natural Resources Co. from the speculative oil lease deal can be calculated using probabilities and values. Equity holders would prefer the alternative with the speculative oil lease deal, while debt holders would prefer the alternative without it. This situation can be described as risk versus reward.
Step-by-step explanation:
The overall expected payoff to Natural Resources Co. from the speculative oil lease deal can be calculated by multiplying the probability of each outcome by its corresponding value and summing the results. The expected payoff is determined by multiplying the probability of discovering a major new oil field ($1 billion) by 10% and adding it to the product of the probability of discovering a productive oil field ($600 million) by 15%, and finally adding the product of the probability of not discovering oil by 75%.
The payoffs to the debt and equity holders with and without the speculative oil lease deal depend on the outcome of the lease. Without the lease deal, the payoffs remain at $200 million each for the active oil fields, which is the market value. With the lease deal, the payoff for discovering a major new oil field is $1 billion, and for a productive oil field, it is $600 million.
Equity holders would prefer the alternative with the speculative oil lease deal since it offers the potential for higher payoffs. Debt holders, on the other hand, would prefer the alternative without the speculative oil lease deal as it guarantees the market value payoffs and reduces risk.
The economic term that describes this situation is risk versus reward. By accepting the highly speculative lease deal, Natural Resources Co. is taking on the risk of not discovering oil, but also has the opportunity for higher rewards if oil is discovered.