Historical data suggests portfolios constructed on quality, value, growth, alpha, momentum, volatility were able to reward investors with better returns than that offered by market-cap based indices. Mutual fund houses are keen to launch ETFs that track the performance of the factor indices. Historical data suggests portfolios constructed on quality, value, growth, alpha, momentum, volatility were able to reward investors with better returns than that offered by market-cap based indices. Mutual fund houses are keen to launch ETFs that track the performance of the factor indices. Economic Times