Previous research examining the price impact of institutional trading concludes that index funds incur higher liquidity costs due to the higher demand for trading immediacy. However, this conclusion has only been inferred by comparing the total price impact of active and index funds. This study extends the literature by decomposing the price impact of both active and index funds' trades into liquidity (temporary) and information (permanent) components. Index fund trades incur higher liquidity costs and generate lower returns than active funds' trades. Indeed, the evidence presented in this study reveals the execution costs of index funds' trades are entirely liquidity-driven.