We consider the mean-variance hedging problem when asset prices follow ItÆ processes in an incomplete market framework. The hedging numÊraire and the variance-optimal martingale measure appear to be a key tool for characterizing the optimal hedging strategy (see GouriÊroux et al. 1996;...

We consider the mean-variance hedging problem when the risky assets price process is a continuous semimartingale. The usual approach deals with self-financed portfolios with respect to the primitive assets family. By adding a numéraire as an asset to trade in, we show how self-financed...