1. A method for calculating the financial status of a company, comprising the steps of: calculating, using a computer, a value of the company in accordance with a formula dV V = ( r + λ ) ⁢ dt + σ ⁢ ⁢ dW - dN wherein V is the value of the company, r is an interest rate, λ is an intensity of a jump arrival, σ is a volatility of the company, N is a standard Poisson process, W is a standard Wiener process, and t is a time between 0 and T, T being a maturity of a debt; and using the value of the company to calculate, using the computer, a financial metric for the company.