Before revision:  A swap portfolio is a portfolio in which each one of a pair of assets is held at a weight proportional to the market value of the other . A reverse-weighted index portfolio is a portfolio in which the weights of the market portfolio are swapped pairwise by rank.
After revision:  A swap portfolio is a portfolio in which each one of a pair of assets is held at a weight proportional to the market value of the other . A reverse-weighted portfolio is a portfolio in which the weights of the market portfolio are swapped pairwise by rank.