Cumulative Claim Development Factors

a.k.a Age-to-ultimate Development Factors

• each CDF projects the remaining growth through maturity

CDF for a maturity (say at 24 months) can be found by multiplying $24\to 36$ , $36\to 48$, $48\to 60$ $\dots$ $\to \text{Ultimate}$ factors.

For example,

$$\text{CDF at 12 months}=(1.307)(1.224)(0.994)=1.591$$