VBMFX vs. VSIGX

Last updated Jun 23, 2026

VBMFX (Vanguard Total Bond Market Index Fund) and VSIGX (Vanguard Intermediate-Term Treasury Index Fund Admiral Shares) are both mutual funds - VBMFX is a Intermediate Core Bond fund managed by Vanguard, while VSIGX is a Government Bonds fund managed by Vanguard. Over the past 10 years, VBMFX returned 1.45%/yr vs 1.21%/yr for VSIGX. Their correlation of 0.92 suggests significant overlap in exposure. VBMFX charges 0.15%/yr vs 0.07%/yr for VSIGX.

Performance

VBMFX vs. VSIGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total Bond Market Index Fund (VBMFX) and Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBMFX achieves a 0.38% return, which is significantly higher than VSIGX's -0.33% return. Over the past 10 years, VBMFX has outperformed VSIGX with an annualized return of 1.45%, while VSIGX has yielded a comparatively lower 1.21% annualized return.

VBMFX

• 1D: 0.31%
• 1M: 0.96%
• YTD: 0.38%
• 6M: 0.70%
• 1Y: 4.57%
• 3Y*: 3.97%
• 5Y*: -0.09%
• 10Y*: 1.45%

VSIGX

• 1D: 0.30%
• 1M: 0.58%
• YTD: -0.33%
• 6M: -0.18%
• 1Y: 3.12%
• 3Y*: 3.71%
• 5Y*: 0.14%
• 10Y*: 1.21%

*Multi-year figures are annualized to reflect compound growth (CAGR)

VBMFX vs. VSIGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBMFX Vanguard Total Bond Market Index Fund	0.38%	7.05%	1.15%	5.62%	-13.25%	-2.04%	7.63%	8.61%	-0.34%	3.45%
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares	-0.33%	7.36%	1.65%	4.39%	-10.69%	-2.60%	7.65%	6.26%	1.35%	1.58%

Correlation

The correlation between VBMFX and VSIGX is 0.91, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Nov 23, 2009	0.92

The correlation between VBMFX and VSIGX has been stable across timeframes, ranging from 0.91 to 0.95 - a consistent structural relationship.

Return for Risk

VBMFX vs. VSIGX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

VBMFX

VBMFX Risk / Return Rank: 20
VBMFX Sharpe Ratio Rank: 20
VBMFX Sortino Ratio Rank: 20
VBMFX Omega Ratio Rank: 18
VBMFX Calmar Ratio Rank: 21
VBMFX Martin Ratio Rank: 19

VSIGX

VSIGX Risk / Return Rank: 13
VSIGX Sharpe Ratio Rank: 14
VSIGX Sortino Ratio Rank: 14
VSIGX Omega Ratio Rank: 12
VSIGX Calmar Ratio Rank: 13
VSIGX Martin Ratio Rank: 11

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

VBMFX vs. VSIGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Bond Market Index Fund (VBMFX) and Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	VBMFX	VSIGX	Difference
Sharpe ratio: Return per unit of total volatility	1.18	0.96	+0.22
Sortino ratio: Return per unit of downside risk	1.77	1.44	+0.33
Omega ratio: Gain probability vs. loss probability	1.21	1.17	+0.04
Calmar ratio: Return relative to maximum drawdown	1.58	1.13	+0.45
Martin ratio: Return relative to average drawdown	4.48	3.11	+1.37

VBMFX vs. VSIGX - Sharpe Ratio Comparison

The current VBMFX Sharpe Ratio is 1.18, which is comparable to the VSIGX Sharpe Ratio of 0.96. The chart below compares the historical Sharpe Ratios of VBMFX and VSIGX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

VBMFX vs. VSIGX - Drawdown Comparison

The maximum VBMFX drawdown since its inception was -19.08%, which is greater than VSIGX's maximum drawdown of -16.15%. Use the drawdown chart below to compare losses from any high point for VBMFX and VSIGX.

Drawdown Indicators

	VBMFX	VSIGX	Difference
Max Drawdown Largest peak-to-trough decline	-19.08%	-16.15%	-2.93%
Max Drawdown (1Y) Largest decline over 1 year	-2.91%	-2.86%	-0.05%
Max Drawdown (3Y) Largest decline over 3 years	-6.02%	-4.21%	-1.81%
Max Drawdown (5Y) Largest decline over 5 years	-18.24%	-15.07%	-3.17%
Max Drawdown (10Y) Largest decline over 10 years	-19.08%	-16.15%	-2.93%
Current Drawdown Current decline from peak	-2.90%	-2.06%	-0.84%
Average Drawdown Average peak-to-trough decline	-2.70%	-3.50%	+0.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.02%	1.04%	-0.02%

Volatility

VBMFX vs. VSIGX - Volatility Comparison

Vanguard Total Bond Market Index Fund (VBMFX) and Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) have volatilities of 1.20% and 1.17%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBMFX	VSIGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.20%	1.17%	+0.03%
Volatility (6M) Calculated over the trailing 6-month period	2.85%	2.48%	+0.37%
Volatility (1Y) Calculated over the trailing 1-year period	3.89%	3.35%	+0.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.01%	5.34%	+0.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.98%	4.45%	+0.53%

VBMFX vs. VSIGX - Expense Ratio Comparison

VBMFX has a 0.15% expense ratio, which is higher than VSIGX's 0.07% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VBMFX vs. VSIGX - Dividend Comparison

VBMFX's dividend yield for the trailing twelve months is around 3.87%, more than VSIGX's 3.83% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VBMFX Vanguard Total Bond Market Index Fund	3.87%	3.76%	3.57%	2.99%	2.49%	1.72%	2.31%	2.63%	2.47%	2.45%	2.43%	2.71%
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares	3.83%	3.76%	3.95%	2.70%	1.71%	1.66%	2.21%	2.21%	2.05%	1.67%	1.56%	1.70%

Frequently Asked Questions

Can I hold both VBMFX and VSIGX in my portfolio?

With a correlation of 0.91, VBMFX and VSIGX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, VBMFX or VSIGX?

VBMFX has higher volatility (1.20%) compared to VSIGX (1.17%). In terms of maximum drawdown, VBMFX dropped -19.08% vs VSIGX's -16.15%.

Which has better risk-adjusted returns?

VBMFX currently has the higher Sharpe Ratio (1.18 vs 0.96), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.