For the purposes of this chapter:
In the event that the calculated monthly annuity exceeds the cap or ceiling determined in accordance with this subdivision, the lender may limit the actual monthly annuity payment to an amount not lower than the cap. If the cap is imposed, the lender's appreciation share shall be limited to 25 percent times the ratio between the actual capped monthly payment and the monthly payment calculated in accordance with the first sentence of this subdivision. For example, if the monthly payment calculated in the first sentence is five thousand dollars ($5,000), but the lender applies a two thousand five hundred dollar ($2,500) ceiling, the lender's share of the home's appreciation shall be likewise reduced by 50 percent.
The minimum cap shall be two thousand five hundred dollars ($2,500) for loans made during the calendar year 1989. In subsequent calendar years, the minimum cap shall be two thousand five hundred dollars ($2,500) increased to reflect the proportional increase in the Consumer Price Index for the State of California, as determined by the United States Bureau of Labor Statistics, for the period from January 1, 1989, until the November monthly index figure for the year prior to the year in which the loan agreement is entered into.
Ca. Civ. Code § 1917.320