Introduction
In a classic financial world as predicted by Modigliani and Miller (M&M), the risk management should be irrelevant. When there are no information asymmetries, taxes or transaction cost involved, hedging will not add any value to a firm because shareholders or companies can diversify their portfolio in such a way that their overall risk will be totally hedged (Lin and Chang 2006). However, the real world is far from the Modigliani and Miller model. In practice, we see imperfections in the financial market. This imperfection may actually create a rationale to reduce the volatility of earnings for a firm through hedging.
Many empirical ...