Finance concepts which assess the risk of a stock by using the leverage (debt to equity ratio) of a firm, in my opinion, are somewhat confusing. For example, in calculating beta for a leveraged firm by using the beta of a unleveraged one, finance books use the book value of equity but for rendering justification for” leveraged effects” (asymmetric response of volatility to positive and negative shock), as debated in econometrics literature, they go for market value of capital, saying when the market stock price decreases, the leverage ratio increases, and so investors expected return of the stock increases to compensate for induced risk.