Flylets and invariant risk metrics
Kharen Musaelian, Santhanam Nagarajan and Dario Villani show how to build robust risk metrics for bond returns based on a global structure in the form of principal components and a novel quasi-local representation for the residuals
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The highly correlated nature of bond returns creates a particular challenge for the portfolio management of interest rate products. Unlike stock portfolios, in which large idiosyncratic components of single name returns limit the amount of concentration and leverage, interest rate strategies rely on large and varying amounts of leverage and have limited avenues for diversification. This makes it especially valuable to create a parsimonious representation of risk that
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