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VOO vs. VMBS: What’s The Difference?

The Vanguard S&P 500 ETF (VOO) and the Vanguard Mortgage-Backed Securities Index Fund ETF Shares (VMBS) are both among the Top 100 ETFs. VOO is a Vanguard Large Blend fund and VMBS is a Vanguard Intermediate Government fund. So, what’s the difference between VOO and VMBS? And which fund is better?

The expense ratio of VOO is 0.02 percentage points lower than VMBS’s (0.03% vs. 0.05%). VOO also has a high exposure to the technology sector while VMBS is mostly comprised of AAA bonds. Overall, VOO has provided higher returns than VMBS over the past ten years.

In this article, we’ll compare VOO vs. VMBS. We’ll look at industry exposure and performance, as well as at their annual returns and portfolio growth. Moreover, I’ll also discuss VOO’s and VMBS’s holdings, fund composition, and risk metrics and examine how these affect their overall returns.

Summary

VOOVMBS
NameVanguard S&P 500 ETFVanguard Mortgage-Backed Securities Index Fund ETF Shares
CategoryLarge BlendIntermediate Government
IssuerVanguardVanguard
AUM753.41B16.61B
Avg. Return14.45%2.89%
Div. Yield1.34%1.23%
Expense Ratio0.03%0.05%

The Vanguard S&P 500 ETF (VOO) is a Large Blend fund that is issued by Vanguard. It currently has 753.41B total assets under management and has yielded an average annual return of 14.45% over the past 10 years. The fund has a dividend yield of 1.34% with an expense ratio of 0.03%.

The Vanguard Mortgage-Backed Securities Index Fund ETF Shares (VMBS) is a Intermediate Government fund that is issued by Vanguard. It currently has 16.61B total assets under management and has yielded an average annual return of 2.89% over the past 10 years. The fund has a dividend yield of 1.23% with an expense ratio of 0.05%.

VOO’s dividend yield is 0.11% higher than that of VMBS (1.34% vs. 1.23%). Also, VOO yielded on average 11.55% more per year over the past decade (14.45% vs. 2.89%). The expense ratio of VOO is 0.02 percentage points lower than VMBS’s (0.03% vs. 0.05%).

Fund Composition

Holdings

VOO - Holdings

VOO HoldingsWeight
Apple Inc5.92%
Microsoft Corp5.62%
Amazon.com Inc4.06%
Facebook Inc Class A2.29%
Alphabet Inc Class A2.02%
Alphabet Inc Class C1.97%
Tesla Inc1.44%
Berkshire Hathaway Inc Class B1.44%
NVIDIA Corp1.37%
JPMorgan Chase & Co1.3%

VOO’s Top Holdings are Apple Inc, Microsoft Corp, Amazon.com Inc, Facebook Inc Class A, and Alphabet Inc Class A at 5.92%, 5.62%, 4.06%, 2.29%, and 2.02%.

Alphabet Inc Class C (1.97%), Tesla Inc (1.44%), and Berkshire Hathaway Inc Class B (1.44%) have a slightly smaller but still significant weight. NVIDIA Corp and JPMorgan Chase & Co are also represented in the VOO’s holdings at 1.37% and 1.3%.

VMBS - Holdings

VMBS Bond SectorsWeight
AAA100.01%
Below B0.0%
B0.0%
BB0.0%
BBB0.0%
A0.0%
AA0.0%
US Government0.0%
Others-0.01%

VMBS’s Top Bond Sectors are ratings of AAA, Below B, B, BB, and BBB at 100.01%, 0.0%, 0.0%, 0.0%, and 0.0%. The fund is less weighted towards A (0.0%), AA (0.0%), and US Government (0.0%) rated bonds.

Performance

Annual Returns

VOO vs. VMBS - Annual Returns

YearVOOVMBS
202018.35%3.77%
201931.46%6.17%
2018-4.42%0.87%
201721.78%2.37%
201611.93%1.43%
20151.35%1.43%
201413.63%5.81%
201332.33%-1.28%
201215.98%2.47%
20112.09%5.89%
20100.0%5.24%

VOO had its best year in 2013 with an annual return of 32.33%. VOO’s worst year over the past decade yielded -4.42% and occurred in 2018. In most years the Vanguard S&P 500 ETF provided moderate returns such as in 2016, 2014, and 2012 where annual returns amounted to 11.93%, 13.63%, and 15.98% respectively.

The year 2019 was the strongest year for VMBS, returning 6.17% on an annual basis. The poorest year for VMBS in the last ten years was 2013, with a yield of -1.28%. Most years the Vanguard Mortgage-Backed Securities Index Fund ETF Shares has given investors modest returns, such as in 2017, 2012, and 2020, when gains were 2.37%, 2.47%, and 3.77% respectively.

Portfolio Growth

VOO vs. VMBS - Portfolio Growth

FundInitial BalanceFinal BalanceCAGR
VOO$10,000$36,57514.45%
VMBS$10,000$13,2652.89%

A $10,000 investment in VOO would have resulted in a final balance of $36,575. This is a profit of $26,575 over 10 years and amounts to a compound annual growth rate (CAGR) of 14.45%.

With a $10,000 investment in VMBS, the end total would have been $13,265. This equates to a $3,265 profit over 10 years and a compound annual growth rate (CAGR) of 2.89%.

VOO’s CAGR is 11.55 percentage points higher than that of VMBS and as a result, would have yielded $23,310 more on a $10,000 investment. Thus, VOO outperformed VMBS by 11.55% annually.


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