Given an insurance portfolio, investment in new business is used to minimiz
e the probability of technical ruin for the total position. This is a simpl
e stochastic control problem for which solutions can be characterized and c
omputed when the risk processes for old and new business are modelled by co
mpound Poisson processes. (C) 2000 Elsevier Science B.V. All rights reserve
d. JEL classification: C610, C690.