VSIIX vs. VBIPX

Last updated Jul 18, 2026

VSIIX (Vanguard Small-Cap Value Index Fund Institutional Shares) and VBIPX (Vanguard Short-Term Bond Index Fund Institutional Plus) are both mutual funds - VSIIX is a Small Cap Value Equities fund managed by Vanguard, while VBIPX is a Total Bond Market fund managed by Vanguard. Over the past 10 years, VSIIX returned 10.70%/yr vs 1.86%/yr for VBIPX. At a correlation of -0.10, they often move in opposite directions. VSIIX charges 0.06%/yr vs 0.04%/yr for VBIPX.

Performance

VSIIX vs. VBIPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Small-Cap Value Index Fund Institutional Shares (VSIIX) and Vanguard Short-Term Bond Index Fund Institutional Plus (VBIPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VSIIX achieves a 17.17% return, which is significantly higher than VBIPX's 0.36% return. Over the past 10 years, VSIIX has outperformed VBIPX with an annualized return of 10.70%, while VBIPX has yielded a comparatively lower 1.86% annualized return.

VSIIX

• 1D: 1.36%
• 1M: 4.23%
• 6M: 10.32%
• YTD: 17.17%
• 1Y: 24.88%
• 3Y*: 15.55%
• 5Y*: 10.43%
• 10Y*: 10.70%

VBIPX

• 1D: -0.10%
• 1M: 0.34%
• 6M: 0.65%
• YTD: 0.36%
• 1Y: 3.28%
• 3Y*: 4.38%
• 5Y*: 1.56%
• 10Y*: 1.86%

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

VSIIX vs. VBIPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VSIIX Vanguard Small-Cap Value Index Fund Institutional Shares	17.17%	9.10%	11.37%	17.06%	-9.31%	28.12%	5.81%	22.81%	-12.24%	11.80%
VBIPX Vanguard Short-Term Bond Index Fund Institutional Plus	0.36%	6.12%	3.78%	4.45%	-5.68%	-1.17%	4.73%	4.89%	1.38%	1.21%

Correlation

The correlation between VSIIX and VBIPX is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.25
Correlation (3Y) Calculated over the trailing 3-year period	0.17
Correlation (5Y) Calculated over the trailing 5-year period	0.12
Correlation (10Y) Calculated over the trailing 10-year period	-0.04
Correlation (All Time) Calculated using the full available price history since Sep 27, 2011	-0.10

The correlation between VSIIX and VBIPX shifts across timeframes, from -0.10 (all time) to 0.25 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

VSIIX vs. VBIPX — Risk / Return Rank

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

VSIIX

VSIIX Risk / Return Rank: 64
VSIIX Sharpe Ratio Rank: 57
VSIIX Sortino Ratio Rank: 63
VSIIX Omega Ratio Rank: 51
VSIIX Calmar Ratio Rank: 78
VSIIX Martin Ratio Rank: 69

VBIPX

VBIPX Risk / Return Rank: 42
VBIPX Sharpe Ratio Rank: 38
VBIPX Sortino Ratio Rank: 52
VBIPX Omega Ratio Rank: 43
VBIPX Calmar Ratio Rank: 43
VBIPX Martin Ratio Rank: 34

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.

VSIIX vs. VBIPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Small-Cap Value Index Fund Institutional Shares (VSIIX) and Vanguard Short-Term Bond Index Fund Institutional Plus (VBIPX). 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.

	VSIIX	VBIPX	Difference
Sharpe ratio: Return per unit of total volatility	1.76	1.46	+0.30
Sortino ratio: Return per unit of downside risk	2.61	2.42	+0.20
Omega ratio: Gain probability vs. loss probability	1.31	1.28	+0.03
Calmar ratio: Return relative to maximum drawdown	2.97	2.13	+0.84
Martin ratio: Return relative to average drawdown	10.59	6.35	+4.24

VSIIX vs. VBIPX - Sharpe Ratio Comparison

The current VSIIX Sharpe Ratio is 1.76, which is comparable to the VBIPX Sharpe Ratio of 1.46. The chart below compares the historical Sharpe Ratios of VSIIX and VBIPX, 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

VSIIX vs. VBIPX - Drawdown Comparison

The maximum VSIIX drawdown since its inception was -62.05%, which is greater than VBIPX's maximum drawdown of -8.72%. Use the drawdown chart below to compare losses from any high point for VSIIX and VBIPX.

Drawdown Indicators

	VSIIX	VBIPX	Difference
Max Drawdown Largest peak-to-trough decline	-62.05%	-8.72%	-53.33%
Max Drawdown (1Y) Largest decline over 1 year	-8.87%	-1.54%	-7.33%
Max Drawdown (3Y) Largest decline over 3 years	-24.09%	-1.54%	-22.55%
Max Drawdown (5Y) Largest decline over 5 years	-24.09%	-8.69%	-15.40%
Max Drawdown (10Y) Largest decline over 10 years	-45.38%	-8.72%	-36.66%
Current Drawdown Current decline from peak	0.00%	-0.58%	+0.58%
Average Drawdown Average peak-to-trough decline	-8.48%	-1.18%	-7.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.48%	0.52%	+1.96%

Volatility

VSIIX vs. VBIPX - Volatility Comparison

Vanguard Small-Cap Value Index Fund Institutional Shares (VSIIX) has a higher volatility of 3.18% compared to Vanguard Short-Term Bond Index Fund Institutional Plus (VBIPX) at 0.67%. This indicates that VSIIX's price experiences larger fluctuations and is considered to be riskier than VBIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VSIIX	VBIPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.18%	0.67%	+2.51%
Volatility (6M) Calculated over the trailing 6-month period	10.51%	1.69%	+8.82%
Volatility (1Y) Calculated over the trailing 1-year period	14.98%	2.26%	+12.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.65%	2.98%	+16.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.74%	2.41%	+19.33%

VSIIX vs. VBIPX - Expense Ratio Comparison

VSIIX has a 0.06% expense ratio, which is higher than VBIPX's 0.04% 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

VSIIX vs. VBIPX - Dividend Comparison

VSIIX's dividend yield for the trailing twelve months is around 1.76%, less than VBIPX's 4.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VBIPX Vanguard Short-Term Bond Index Fund Institutional Plus	4.05%	3.86%	3.40%	2.01%	1.40%	1.26%	1.82%	2.27%	2.04%	1.69%	1.53%	1.46%
VSIIX Vanguard Small-Cap Value Index Fund Institutional Shares	1.76%	1.96%	1.99%	2.10%	2.04%	1.76%	1.69%	2.07%	2.36%	1.80%	1.77%	1.99%

Frequently Asked Questions

Can I hold both VSIIX and VBIPX in my portfolio?

VSIIX and VBIPX have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VSIIX or VBIPX?

VSIIX has higher volatility (3.18%) compared to VBIPX (0.67%). In terms of maximum drawdown, VSIIX dropped -62.05% vs VBIPX's -8.72%.

Which has better risk-adjusted returns?

VSIIX currently has the higher Sharpe Ratio (1.76 vs 1.46), 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.