EN
This paper deals with new immunization strategies for a noncallable and default-free bond portfolio. This approach refers to the Fong and Vasicek (1984), the Nawalkha and Chambers (1996), the Balbàs and Ibáňez (1998), and the Balbàs, Ibáňez and Lopez (2002) studies among others and relies on minimizing a single-risk measure which is a linear combination of the duration gap and the dispersion of portfolio payments.