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Answer: It incorporates mean reversion feature and its drift is always zero.
The Vasicek model is an interest rate term structure model that incorporates mean reversion, which is a key feature mentioned in the question. However, the statement that "its drift is always zero" is incorrect. In the Vasicek model, the drift term includes both the mean reversion component and a constant term, not zero. The correct formulation of the Vasicek model is: dr = κ(θ - r)dt + σdW Where: - κ is the speed of mean reversion - θ is the long-term mean level - r is the current interest rate - σ is the volatility - dW is a Wiener process The drift term κ(θ - r) is not always zero; it depends on the difference between the current rate and the long-term mean.
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A hedge fund risk manager is looking at various models that are flexible enough to incorporate mean reversion and risk premium into term structure modeling. Which of the following is correct about the Vasicek model?
A
It incorporates mean reversion feature and its drift is always zero.
B