The investment seeks to track the performance of a benchmark index that measures the investment return of mid-capitalization stocks. The fund employs a passive management investment approach designed to track the performance of the MSCI US Mid Cap 450 index, a broadly diversified index of the stocks of medium-size U.S. companies. It attempts to replicate the target index by investing all, or substantially all, of assets in the stocks that make up the index, holding each stock in approximately the same proportion as its weighting in the index.
Fund filings (PDF) »

Asset manager:
Donald Butler (Started: May 21, 1998)

Advisor Company:
The Vanguard Group, Inc.
Fund family reports on Morningstar »

	1 year	3 years	5 years	10 years
Alpha*	8.44	-0.54	2.94	7.59
Beta*	1.10	0.99	1.20	1.06
Mean annual return	1.80	-0.36	0.36	0.65
R-squared*	92.71	99.47	91.73	83.14
Standard deviation	27.05	23.88	19.89	18.83
Sharpe ratio	0.79	-0.28	0.07	0.26
* Against standard index

Risk measurement details »

Security	Net Assets
Bunge, Ltd. (BG)	0.53%
Fiserv, Inc. (FISV)	0.53%
Life Technologies Corp (LIFE)	0.52%
IntercontinentalExchange, Inc. (ICE)	0.51%
Computer Sciences Corporation (CSC)	0.49%
Rockwell Collins, Inc. (COL)	0.48%
Range Resources Corporation (RRC)	0.47%
El Paso Corporation (EP)	0.47%
McAfee, Inc. (MFE)	0.47%
Intuitive Surgical, Inc. (ISRG)	0.46%

Holdings Performance »