Consider an ATMF straddle's price under lognormal and normal dynamics, and use the first central difference approximation

Question:

Consider an ATMF straddle's price under lognormal and normal dynamics, and use the first central difference approximation

\[N^{\prime}(x) \times x \approx N(x / 2)-N(-x / 2)\]

to relate the normalized volatility to lognormal volatility

\[\sigma_{N} \approx \sigma \times F\]

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Question Posted: