put call parity
The theoretical mathematical relation of a put option's price to that of a call option with otherwise identical pricing parameters. If put call parity is not observed in the forex options market, an arbitrageur may buy the undervalued option, sell the overvalued option and hedge the resulting position with a forward trade maturing on the options' delivery date in the underlying currency pair to lock in a profit.
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uncrossed cheque
Sarbanes Oxley Act
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