To investigate the fundamental indexing methodology, I apply it to global government bond markets and examine its exposure to several newly introduced risk factors. I find that the fundamental indexing approach outperforms a market-value-weighted index. However, my results show statistically significant and economically relevant exposures of fundamentally weighted indexes to the risk factors term and duration risk, default risk, convexity risk, liquidity risk, and carry trade risk. The increased risk exposure explains the outperformance of the fundamental indexing methodology in government bond markets.