"The Vanguard Group of Investment Companies" "Vanguard Money Market Reserves -- Prime Portfolio" USD 198001 1.11 198002 1.04 198003 1.23 198004 1.32 198005 1.34 198006 0.84 198007 0.76 198008 0.75 198009 0.78 198010 0.90 198011 0.99 198012 1.31 198101 1.43 198102 1.31 198103 1.30 198104 1.18 198105 1.39 198106 1.46 198107 1.48 198108 1.50 198109 1.42 198110 1.34 198111 1.20 198112 1.03 198201 1.04 198202 0.99 198203 1.16 198204 1.15 198205 1.20 198206 1.13 198207 1.17 198208 1.05 198209 0.89 198210 0.83 198211 0.74 198212 0.72 198301 0.70 198302 0.63 198303 0.69 198304 0.68 198305 0.70 198306 0.68 198307 0.73 198308 0.76 198309 0.75 198310 0.77 198311 0.73 198312 0.76 198401 0.78 198402 0.72 198403 0.78 198404 0.79 198405 0.85 198406 0.86 198407 0.92 198408 0.95 198409 0.93 198410 0.93 198411 0.83 198412 0.76 198501 0.71 198502 0.62 198503 0.71 198504 0.69 198505 0.69 198506 0.63 198507 0.63 198508 0.62 198509 0.60 198510 0.63 198511 0.62 198512 0.64 198601 0.63 198602 0.57 198603 0.62 198604 0.57 198605 0.56 198606 0.53 198607 0.55 198608 0.53 198609 0.47 198610 0.47 198611 0.45 198612 0.47 198701 0.48 198702 0.43 198703 0.48 198704 0.48 198705 0.53 198706 0.53 198707 0.56 198708 0.56 198709 0.55 198710 0.61 198711 0.62 198712 0.62 198801 0.60 198802 0.53 198803 0.55 198804 0.53 198805 0.56 198806 0.57 198807 0.61 198808 0.65 198809 0.65 198810 0.68 198811 0.68 198812 0.72 198901 0.75 198902 0.69 198903 0.79 198904 0.80 198905 0.83 198906 0.78 198907 0.78 198908 0.75 198909 0.71 198910 0.73 198911 0.70 198912 0.71 199001 0.70 199002 0.62 199003 0.68 199004 0.66 199005 0.69 199006 0.66 199007 0.68 199008 0.67 199009 0.64 199010 0.67 199011 0.64 199012 0.66 199101 0.64 199102 0.54 199103 0.56 199104 0.52 199105 0.51 199106 0.48 199107 0.49 199108 0.49 199109 0.46 199110 0.45 199111 0.42 199112 0.42 199201 0.39 199202 0.33 199203 0.34 199204 0.33 199205 0.33 199206 0.31 199207 0.31 199208 0.29 199209 0.27 199210 0.26 199211 0.25 199212 0.27 199301 0.27 199302 0.23 199303 0.25 199304 0.24 199305 0.24 199306 0.24 199307 0.25 199308 0.25 199309 0.24 199310 0.25 199311 0.24 199312 0.26 199401 0.26 199402 0.23 199403 0.26 199404 0.27 199405 0.31 199406 0.32 199407 0.35 199408 0.37 199409 0.37 199410 0.40 199411 0.41 199412 0.46 199501 0.48 199502 0.44 199503 0.50 199504 0.48 199505 0.50 199506 0.48 199507 0.48 199508 0.47 199509 0.45 199510 0.47 199511 0.45 199512 0.47 199601 0.46 199602 0.41 199603 0.43 199604 0.41 199605 0.429 199606 0.420 199607 0.438 199608 0.439 199609 0.426 199610 0.441 199611 0.423 199612 0.438