Ito and Stratonovich Solutions of the Linear Growth Model
Define Ito and Stratonovich processes with the same SDE
:
Find mean and variance functions for the Ito process:
The mean and variance functions for the Stratonovich process are different:
When
, the Ito solution almost surely converges to zero, i.e. the large
limit of probability that process value is
does not exceed
equals
:
Confirm it using simulations:
When
, the Stratonovich solution, however, almost surely diverges, i.e. the large
limit of the probability that process value
exceeds
equals
:
Confirm it using simulations: