Delta replication from a local-volatility pricing equation

ID: delta-replication-from-a-local-volatility-pricing-equation

If satisfies the pricing equation for a local volatility model, hold stocks and units of the bank account. Their value is . The pricing equation for a local volatility model and Itô formula give
Thus this is a self-financing strategy, with terminal value . It is a delta hedge, and nonnegative makes its wealth an admissible trading strategy. The stock and bank wealth amounts are and , rather than the asset-unit holdings.

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