VBLIX vs. VFIAX

Last updated Jun 24, 2026

VBLIX (Vanguard Long-Term Bond Index Fund Institutional Plus) and VFIAX (Vanguard 500 Index Fund Admiral Shares) are both mutual funds - VBLIX is a Total Bond Market fund managed by Vanguard, while VFIAX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, VBLIX returned 0.73%/yr vs 15.76%/yr for VFIAX. At a correlation of -0.15, they often move in opposite directions. Both charge a 0.04% expense ratio.

Performance

VBLIX vs. VFIAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Long-Term Bond Index Fund Institutional Plus (VBLIX) and Vanguard 500 Index Fund Admiral Shares (VFIAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBLIX achieves a 0.27% return, which is significantly lower than VFIAX's 9.77% return. Over the past 10 years, VBLIX has underperformed VFIAX with an annualized return of 0.73%, while VFIAX has yielded a comparatively higher 15.76% annualized return.

VBLIX

• 1D: -0.67%
• 1M: 1.59%
• YTD: 0.27%
• 6M: 0.58%
• 1Y: 5.14%
• 3Y*: 1.62%
• 5Y*: -3.89%
• 10Y*: 0.73%

VFIAX

• 1D: -0.36%
• 1M: 0.10%
• YTD: 9.77%
• 6M: 8.77%
• 1Y: 25.48%
• 3Y*: 21.36%
• 5Y*: 13.57%
• 10Y*: 15.76%

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

VBLIX vs. VFIAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBLIX Vanguard Long-Term Bond Index Fund Institutional Plus	0.27%	6.61%	-4.11%	6.78%	-27.20%	-3.08%	16.29%	19.16%	-4.70%	10.90%
VFIAX Vanguard 500 Index Fund Admiral Shares	9.77%	17.83%	24.97%	26.24%	-18.16%	28.65%	18.32%	31.46%	-4.45%	21.78%

Correlation

The correlation between VBLIX and VFIAX is 0.32, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.32
Correlation (3Y) Calculated over the trailing 3-year period	0.24
Correlation (5Y) Calculated over the trailing 5-year period	0.14
Correlation (10Y) Calculated over the trailing 10-year period	-0.02
Correlation (All Time) Calculated using the full available price history since Sep 27, 2011	-0.15

The correlation between VBLIX and VFIAX shifts across timeframes, from -0.15 (all time) to 0.32 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

VBLIX vs. VFIAX — Risk / Return Rank

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

VBLIX

VBLIX Risk / Return Rank: 9
VBLIX Sharpe Ratio Rank: 9
VBLIX Sortino Ratio Rank: 8
VBLIX Omega Ratio Rank: 8
VBLIX Calmar Ratio Rank: 10
VBLIX Martin Ratio Rank: 9

VFIAX

VFIAX Risk / Return Rank: 65
VFIAX Sharpe Ratio Rank: 63
VFIAX Sortino Ratio Rank: 57
VFIAX Omega Ratio Rank: 59
VFIAX Calmar Ratio Rank: 68
VFIAX Martin Ratio Rank: 78

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.

VBLIX vs. VFIAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Long-Term Bond Index Fund Institutional Plus (VBLIX) and Vanguard 500 Index Fund Admiral Shares (VFIAX). 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.

	VBLIX	VFIAX	Difference
Sharpe ratio: Return per unit of total volatility	0.67	2.15	-1.47
Sortino ratio: Return per unit of downside risk	1.01	2.91	-1.89
Omega ratio: Gain probability vs. loss probability	1.12	1.39	-0.27
Calmar ratio: Return relative to maximum drawdown	0.91	3.01	-2.10
Martin ratio: Return relative to average drawdown	2.28	13.60	-11.32

VBLIX vs. VFIAX - Sharpe Ratio Comparison

The current VBLIX Sharpe Ratio is 0.67, which is lower than the VFIAX Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of VBLIX and VFIAX, 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

VBLIX vs. VFIAX - Drawdown Comparison

The maximum VBLIX drawdown since its inception was -38.61%, smaller than the maximum VFIAX drawdown of -55.20%. Use the drawdown chart below to compare losses from any high point for VBLIX and VFIAX.

Drawdown Indicators

	VBLIX	VFIAX	Difference
Max Drawdown Largest peak-to-trough decline	-38.61%	-55.20%	+16.59%
Max Drawdown (1Y) Largest decline over 1 year	-5.98%	-8.90%	+2.92%
Max Drawdown (3Y) Largest decline over 3 years	-14.90%	-18.75%	+3.85%
Max Drawdown (5Y) Largest decline over 5 years	-36.49%	-24.53%	-11.96%
Max Drawdown (10Y) Largest decline over 10 years	-38.61%	-33.83%	-4.78%
Current Drawdown Current decline from peak	-24.88%	-1.72%	-23.16%
Average Drawdown Average peak-to-trough decline	-11.55%	-9.38%	-2.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.39%	1.97%	+0.42%

Volatility

VBLIX vs. VFIAX - Volatility Comparison

The current volatility for Vanguard Long-Term Bond Index Fund Institutional Plus (VBLIX) is 2.11%, while Vanguard 500 Index Fund Admiral Shares (VFIAX) has a volatility of 4.67%. This indicates that VBLIX experiences smaller price fluctuations and is considered to be less risky than VFIAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBLIX	VFIAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.11%	4.67%	-2.56%
Volatility (6M) Calculated over the trailing 6-month period	5.89%	9.84%	-3.95%
Volatility (1Y) Calculated over the trailing 1-year period	8.13%	12.50%	-4.37%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	12.86%	16.99%	-4.13%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.59%	18.11%	-6.52%

VBLIX vs. VFIAX - Expense Ratio Comparison

Both VBLIX and VFIAX have an expense ratio of 0.04%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

VBLIX vs. VFIAX - Dividend Comparison

VBLIX's dividend yield for the trailing twelve months is around 4.79%, more than VFIAX's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VBLIX Vanguard Long-Term Bond Index Fund Institutional Plus	4.79%	4.67%	4.64%	3.42%	4.17%	2.89%	5.85%	3.63%	3.83%	3.71%	4.20%	5.00%
VFIAX Vanguard 500 Index Fund Admiral Shares	1.03%	1.12%	1.24%	1.45%	1.68%	1.24%	1.53%	1.87%	2.05%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both VBLIX and VFIAX in my portfolio?

VBLIX and VFIAX have a correlation of 0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VBLIX or VFIAX?

VFIAX has higher volatility (4.67%) compared to VBLIX (2.11%). In terms of maximum drawdown, VBLIX dropped -38.61% vs VFIAX's -55.20%.

Which has better risk-adjusted returns?

VFIAX currently has the higher Sharpe Ratio (2.15 vs 0.67), 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.