The drawback of no defined maturity date for collective bond investments is being addressed by ETFs from Guggenheim Investments and Black Rock’s Ishares, the latter being the most recently launched (ft.com April 24th 2013). These ETFs combine the benefits of reducing risk through a portfolio of bonds with the certainty of a defined maturity date.
Whilst these are targetting the US market one an only hope that if these ETFs prove successful then we will see similar products aimed at European investors.