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Fixed vs float swap interest rate risk

Just a point of clarification in relation to the "OIS discounting curve" and the "par swap curve". The question is somewhat confusing because it seems to imply that these are ...
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Negative-gamma delta hedging (for a call option writer): how will the stock price affect the portfolio profit?

Yes the p/l profile is the reflection of the yellow line so it appears that the option writer always loses money. However the option writer benefits from time decay, denoted by the Greek letter theta....
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