RevenueShares, the pioneers of revenue-weighted exchange-traded funds, recently expanded its lineup of unique funds with the launch of the RevenueShares Global Growth Fund (RGRO). The firm’s six existing funds follow the so-called revenue-weighted model with different tweaks. For example, the RevenueShares Large Cap Fund (RWL) takes the S&P 500 Index and re-weights the constituents by their respective revenues. So instead …