The price of a generic asset can be written as
pt=ℂ𝕆𝕍t(mt+1,xt+1)+
1

1+Rf
𝔼t(xt+1)
where pt is the price of asset at time t; xt+1 is the payoff of the asset at time t+1; Rf indicates the return on the risk-free asset; mt+1 is the stochastic discount factor; and 𝔼t and ℂ𝕆𝕍t denote the conditional expectation and covariance at time t, respectively.

Assume that the asset has expected payoff 𝔼t(xt+1)=10. Then we can say:

Question

The price of a generic asset can be written as
pt=ℂ𝕆𝕍t(mt+1,xt+1)+
1

1+Rf
𝔼t(xt+1)
where pt is the price of asset at time t; xt+1 is the payoff of the asset at time t+1; Rf indicates the return on the risk-free asset; mt+1 is the stochastic discount factor; and 𝔼t and ℂ𝕆𝕍t denote the conditional expectation and covariance at time t, respectively.

Assume that the asset has expected payoff 𝔼t(xt+1)=10. Then we can say:

BlackTom AI · Accepted Answer

Let’s restate the given relationship and the information provided, so we’re clear on what is known and what is unknown.
The asset price at time t is given by p_t = Cov_t(m_{t+1}, x_{t+1}) + (1/(1+R_f)) E_t(x_{t+1}).
We are told that the expected payoff is E_t(x_{t+1}) = 10. This means the second term becomes (1/(1+R_f)) * 10 = 10/(1+R_f) if no other information is needed.
What we do not know is the sign and magnitude of the covariance term Cov_t(m_{t+1}, x_{t+1}). This covariance captures how the asset payoff co-moves with the stochastic discount factor, i.e., how payoffs covary with pricing kernels and hence with overall risk.
Option analysis:
- The statement “There is not enough information to determine whether the price is equal, above or below 10/(1+R_f)” hinges on whether Cov_t(m_{t+1}, x_{t+1}) is known to be zero, positive, or negative.
- If Cov_t(m_{t+1}, x_{t+1}) = 0, then p_t would equal 10/(1+R_f), exactly at that level.
- If Cov_t(m_{t+1}, x_{t+1}) > 0, the price p_t would be above 10/(1+R_f).
- If Cov_t(m_{t+1}, x_{t+1}) < 0, the price p_t would be below 10/(1+R_f).
Since we have no information about the covariance term’s sign or magnitude, we cannot determine whether p_t is equal to, above, or below 10/(1+R_f).
This aligns with the intuition from asset pricing: the risk premium (captured by the covariance with the pricing kernel) can shift the price in either direction depending on the asset’s risk characteristics.
Concluding, the correct inference from the given data is that there is insufficient information to determine the relative position of p_t with respect to 10/(1+R_f).
Note: The options presented (if any) would typically mirror these three possibilities, emphasizing the role of Cov_t(m_{t+1}, x_{t+1}) in determining the exact price relative to 10/(1+R_f).

BU.232.630.F3.SP25 Sample Quiz 2 2025

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