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Finance theory indicates that hedging increases firm value by reducing expected taxes, expected costs of financial distress, or other agency costs. This paper provides evidence on these hypotheses using survey data on firm's use of forwards, futures, swaps, and options combined with COMPUTSTAT data on firm characteristics. Of 169 firms in the sample, 104 firms use hedging instruments in 1986. The data suggest that firms which hedge face more convex tax functions, have less coverage of fixed claims, are larger, have more growth options in their investment opportunity set, and employ fewer hedging substitutes.

The fact that 92% of the world's 500 largest companies recently reported using derivatives suggests that corporate managers believe financial risk management can increase shareholder value. Surveys of finance academics indicate that they too believe that corporate risk management is, on the whole, a valueadding activity. This article provides an overview of almost 30 years of broadbased, stock-market-oriented academic studies that address one or more of the following questions: 2005 Morgan Stanley.

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