These funds are susceptible to interest rate risk as the modified duration of these funds is on the higher side. (wealthtrust.in)
Weschler is very rare, in that he kept his two main holdings the entire duration of his fund and still did around 25 % annual returns. (basehitinvesting.com)
In the Vanguard study the 5.5 year duration of the fund meant that for a 1 % increase in yields you would expect the price to fall by roughly 5.5 %. (awealthofcommonsense.com)