Local volatility models
A) Look to describe volatility accurately locally in time (i.e., around the current time) but not necessarily in the longer run.
B) Look to describe volatility accurately locally in space (i.e., around the current stock price ) but not necessarily when stock prices move away from current levels.
C) Look to identify the form for evolution of volatility that will give rise to the currently observed set of option prices.
D) And stochastic volatility models are exactly the same thing.
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Q17: Stochastic volatility models are said to incorporate
Q18: For the same problem in the preceding
Q19: If the volatility of a stock is
Q20: An option-trading firm is using the Black-Scholes
Q21: If the implied volatility surface is flat
Q22: The Heston (1993) model generalizes the Black-Scholes
Q23: By augmenting the geometric Brownian motion process
Q24: Stochastic volatility models commonly assume
A) There are
Q25: GARCH models
A) Are discrete-time expressions of stochastic
Q26: The Merton (1976) model
A) Modifies the Black-Scholes
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