Consider the HullWhite volatility process: In the chapter, we worked under the simplifying assumption (as per Hull

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Consider the Hull–White volatility process:

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In the chapter, we worked under the simplifying assumption (as per Hull and White’s original paper), that the variance and stock processes were uncorrelated. Now consider the more general case

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Derive an integral expression for the undiscounted price of a call by considering the distribution of the stock conditional on realised variance.

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