In this paper, we determine optimal trading strategies associated with the
financial variance and standard deviation principles proposed by Schweizer
[2001. Insurance: Mathematics and Economics 28, 31-47]. These principles ta
ke into consideration the possibilities of hedging on the financial market
and are derived by an indifference argument, which embeds the traditional (
actuarial) variance and standard deviation principles in a financial framew
ork. We also investigate an alternative way of transforming actuarial princ
iples and show that for the standard deviation principle this leads to the
financial standard deviation principle. The principles are applied for the
valuation and hedging of unit-linked life insurance contracts. (C) 2001 Els
evier Science B.V. All rights reserved.