*Last updated: 2023-03-16.*

# Module: tf_quant_finance.models.heston.approximations

View source Approximations to the Heston model. ## Functions [`asian_option_price(...)`](../../../tf_quant_finance/models/heston/approximations/asian_option_price.md): Computes the Heston price for a batch of asian options. [`calibration(...)`](../../../tf_quant_finance/models/heston/calibration.md): Calibrates the Heston model using European option prices. [`european_option_price(...)`](../../../tf_quant_finance/models/heston/approximations/european_option_price.md): Calculates European option prices under the Heston model.