Both VO and VOO are ETFs. VO has a lower 5-year return than VOO (9.2% vs 10.8%). VO has a higher expense ratio than VOO (0.04% vs 0.03%). Below is the comparison between VO and VOO.

Segment Equity: U.S. - Mid Cap Equity: U.S. - Large Cap
Issuer Vanguard Vanguard
Net Assets $27.22B $121.59B
Expense Ratio 0.04% 0.03%
Management Style passive (index-based) passive (index-based)
Dividend Yield N/A N/A
Underlying Index CRSP US Mid Cap Index S&P 500
YTD Return 22.51% 20.47%
1-Year Return 3.65% 4.24%
3-Year Return 10.67% 13.36%
5-Year Return 9.20% 10.80%
10-Year Return 13.05% 13.28%

VO description

The Fund seeks to track the performance of a benchmark index that measures the investment return of mid-capitalization stocks. The Fund employs a "passive management" approach designed to track the performance of the CRSP US Mid Cap Index, a broadly diversified index of stocks of medium-size U.S. companies.

VO returns

YTD Return 22.51%
1-Month Return 2.10%
3-Month Return 0.58%
1-Year Return 3.65%
3-Year Return 10.67%
5-Year Return 9.20%
10-Year Return 13.05%
VO expense ratio is 0.04%.

VO holdings

Top 10 Holdings (6.80% of Total Assets)

Name Symbol % Assets
Fiserv Inc FISV 0.82%
Red Hat Inc RHI 0.73%
Newmont Goldcorp Corp NEM 0.71%
Xilinx Inc XLNX 0.69%
Advanced Micro Devices Inc AMD 0.68%
Amphenol Corp Class A APH 0.66%
ONEOK Inc OKE 0.65%
Motorola Solutions Inc MSI 0.63%
IQVIA Holdings Inc IQV 0.62%
WEC Energy Group Inc WEC 0.61%

VOO description

The Fund seeks to track the performance of its benchmark index, the S&P 500. The Fund employs an indexing investment approach. The Fund attempts to replicate the target index by investing all of its assets in the stocks that make up the Index with the same approximate weightings as the Index.

VOO returns

YTD Return 20.47%
1-Month Return 1.97%
3-Month Return 1.76%
1-Year Return 4.24%
3-Year Return 13.36%
5-Year Return 10.80%
10-Year Return 13.28%
VOO expense ratio is 0.03%.

VOO holdings

Top 10 Holdings (21.39% of Total Assets)

Name Symbol % Assets
Microsoft Corp MSFT 4.18%
Apple Inc AAPL 3.52%
Amazon.com Inc AMZN 3.19%
Facebook Inc A FB 1.89%
Berkshire Hathaway Inc B BRK.B 1.63%
Johnson & Johnson JNJ 1.51%
JPMorgan Chase & Co JPM 1.48%
Alphabet Inc Class C GOOG 1.35%
Exxon Mobil Corp XOM 1.32%
Alphabet Inc A GOOGL 1.32%
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