Is now 1.4 per vanguards website today. Somebody tell me something I am missing, this fund yields over 4%, little to no default risk with everything backed one by the US gov't and with 1.4 duration unbelievably low interest rate sensitivity. what I am missing here?? this would seem like the best way to go with bond? i already hold the fund but thinking of reducing my sh. term inv. grade and adding to this