Systems, methods, and instructions stored on computer-readable mediums for calculating a volatility score for each of a plurality of securities and calculating a reference volatility score for a benchmark. A relative volatility score is derived for each of the plurality of securities based upon the volatility score for each of the plurality of securities and the reference volatility score. An aggregated volatility score is derived for each of a plurality of accounts based in part on securities held within an account and the relative volatility scores for the securities. A sentiment index is determined based upon the aggregated volatility score for each of the plurality of accounts.