Sixty percent in equities/40 percent in bonds is a popular, general approach to structuring a diversified portfolio. In theory, when times are good, your stocks go up, and when times are bad, your bonds go up. But what if the correlation between bonds and stocks changes? On this week's Odd Lots podcast, we speak with Farouk Jivraj, head of Investment Strategies Research at Barclays, about cross-asset correlations and what causes them to change over time.