The authors study time-variation in the co-movements between daily stock and Treasury bond returns over 1986 to 2000. Their innovation is to examine whether variation in stock-bond return dynamics can be linked to non-return-based measures of stock market uncertainty, specifically the implied...

We study whether asset-class risk dynamics can help explain the predominantly negative stock-bond return relation and movements in the term-structure's slope over 1997-2011. Using option-derived implied volatilities to measure risk, we find: (1) the negative stock-bond return relation largely...