CALIFORNIA FAMILY LAW
...Community Property Issues
......Separate Property
.........Natural Enhancement Req's No Apportion.
3 Cards On This Topic:

Minimal time spent on s/p stock portfolio does not require apportionment. Natural enhancement of s/p is s/p.

Only increase in s/p due to efforts during marriage is c/p.

No apportionment where increase in value due solely to natural enhancement of s/p.