A variable annuity is a modern life insurance product that
offers its policyholders participation in investment with various
guarantees. To address the computational challenge of valuing large
portfolios of variable annuity contracts, several data mining
frameworks based on statistical learning have been proposed in the
past decade. Existing methods utilize regression modeling to
predict the market value of most contracts. Despite the efficiency
of those methods, a regression model fitted to a small amount of
data produces substantial prediction errors, and thus, it is
challenging to rely on existing frameworks when highly accurate
valuation results are desired or required. In this paper, we
propose a novel hybrid framework that effectively chooses and
assesses easy-to-predict contracts using the random forest model
while leaving hard-to-predict contracts for the Monte Carlo
simulation. The effectiveness of the hybrid approach is illustrated
with an experimental study.
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