by Steven L. Heston
Read the PDF in the Directory. Highlight a passage to explain, define or ask about it. Notes are free with an account; answers come with membership.
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Start with the foundations, then use the reading focus to connect the paper to further study.
Follow diffusion-based models and their assumptions.
Separate conditional volatility from observed returns.
Build replication and risk-neutral probabilities in a tractable model.
Distinguish pricing probabilities from physical forecasts.
Study a correlated stochastic-variance model.
Interpret prices across strikes and expiries.
Connect the pricing equation, closed-form value and implied volatility.
Start in discrete time, move to Brownian motion, then read the original pricing argument and simulate it.
Build a baseline pricer before adding stochastic variance.
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