VCORX vs. VUBFX

Last updated Jun 4, 2026

VCORX (Vanguard Core Bond Fund Investor Shares) and VUBFX (Vanguard Ultra-Short-Term Bond Fund Investor Shares) are both Total Bond Market funds from Vanguard. Over the past 10 years, VCORX returned 2.17%/yr vs 2.61%/yr for VUBFX. At a 0.41 correlation, their price movements are largely independent. Both charge a 0.20% expense ratio.

Performance

VCORX vs. VUBFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Core Bond Fund Investor Shares (VCORX) and Vanguard Ultra-Short-Term Bond Fund Investor Shares (VUBFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VCORX achieves a 0.50% return, which is significantly lower than VUBFX's 1.37% return. Over the past 10 years, VCORX has underperformed VUBFX with an annualized return of 2.17%, while VUBFX has yielded a comparatively higher 2.61% annualized return.

VCORX

• 1D: 0.00%
• 1M: 0.49%
• YTD: 0.50%
• 6M: 0.37%
• 1Y: 5.63%
• 3Y*: 4.65%
• 5Y*: 0.47%
• 10Y*: 2.17%

VUBFX

• 1D: 0.00%
• 1M: 0.35%
• YTD: 1.37%
• 6M: 1.75%
• 1Y: 4.40%
• 3Y*: 5.33%
• 5Y*: 3.40%
• 10Y*: 2.61%

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

VCORX vs. VUBFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VCORX Vanguard Core Bond Fund Investor Shares	0.50%	7.68%	2.10%	5.90%	-13.27%	-0.80%	10.19%	9.47%	-0.92%	4.34%
VUBFX Vanguard Ultra-Short-Term Bond Fund Investor Shares	1.37%	5.04%	5.99%	5.43%	-0.53%	0.03%	1.95%	3.34%	1.94%	1.23%

Correlation

The correlation between VCORX and VUBFX is 0.38, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.38
Correlation (3Y) Calculated over the trailing 3-year period	0.49
Correlation (5Y) Calculated over the trailing 5-year period	0.52
Correlation (10Y) Calculated over the trailing 10-year period	0.40
Correlation (All Time) Calculated using the full available price history since Mar 31, 2016	0.41

The correlation between VCORX and VUBFX shifts across timeframes, from 0.38 (1 year) to 0.52 (5 years), reflecting how their relationship changes across market environments.

VCORX vs. VUBFX - Sectors Allocation Comparison

Sectors	VCORX	VUBFX
Financial Services	1.0%	100.0%
Technology	0.1%	-
Energy	0.0%	-
Real Estate	0.0%	-
Basic Materials	-	-
Communication Services	-	-
Consumer Cyclical	-	-
Consumer Defensive	-	-
Healthcare	-	-
Industrials	-	-
Utilities	-	-

Return for Risk

VCORX vs. VUBFX — Risk / Return Rank

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

VCORX

VCORX Risk / Return Rank: 29
VCORX Sharpe Ratio Rank: 28
VCORX Sortino Ratio Rank: 30
VCORX Omega Ratio Rank: 28
VCORX Calmar Ratio Rank: 33
VCORX Martin Ratio Rank: 27

VUBFX

VUBFX Risk / Return Rank: 100
VUBFX Sharpe Ratio Rank: 100
VUBFX Sortino Ratio Rank: 100
VUBFX Omega Ratio Rank: 100
VUBFX Calmar Ratio Rank: 99
VUBFX Martin Ratio Rank: 100

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.

VCORX vs. VUBFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Core Bond Fund Investor Shares (VCORX) and Vanguard Ultra-Short-Term Bond Fund Investor Shares (VUBFX). 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.

	VCORX	VUBFX	Difference
Sharpe ratio Return per unit of total volatility	1.51	5.71	-4.20
Sortino ratio Return per unit of downside risk	2.26	12.83	-10.57
Omega ratio Gain probability vs. loss probability	1.28	4.52	-3.25
Calmar ratio Return relative to maximum drawdown	2.14	14.79	-12.64
Martin ratio Return relative to average drawdown	6.47	83.04	-76.57
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VCORX vs. VUBFX - Sharpe Ratio Comparison

The current VCORX Sharpe Ratio is 1.51, which is lower than the VUBFX Sharpe Ratio of 5.71. The chart below compares the historical Sharpe Ratios of VCORX and VUBFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	VCORX	VUBFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.51	5.71	-4.20
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.08	3.47	-3.39
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	3.14	-2.69
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	3.11	-2.63

Drawdowns

VCORX vs. VUBFX - Drawdown Comparison

The maximum VCORX drawdown since its inception was -18.14%, which is greater than VUBFX's maximum drawdown of -1.86%. Use the drawdown chart below to compare losses from any high point for VCORX and VUBFX.

Drawdown Indicators

	VCORX	VUBFX	Difference
Max Drawdown Largest peak-to-trough decline	-18.14%	-1.86%	-16.28%
Max Drawdown (1Y) Largest decline over 1 year	-2.64%	-0.30%	-2.34%
Max Drawdown (3Y) Largest decline over 3 years	-5.99%	-0.30%	-5.69%
Max Drawdown (5Y) Largest decline over 5 years	-18.14%	-1.86%	-16.28%
Max Drawdown (10Y) Largest decline over 10 years	-18.14%	-1.86%	-16.28%
Current Drawdown Current decline from peak	-1.28%	0.00%	-1.28%
Average Drawdown Average peak-to-trough decline	-4.26%	-0.17%	-4.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.87%	0.05%	+0.82%

Volatility

VCORX vs. VUBFX - Volatility Comparison

Vanguard Core Bond Fund Investor Shares (VCORX) has a higher volatility of 1.35% compared to Vanguard Ultra-Short-Term Bond Fund Investor Shares (VUBFX) at 0.17%. This indicates that VCORX's price experiences larger fluctuations and is considered to be riskier than VUBFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VCORX	VUBFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.35%	0.17%	+1.18%
Volatility (6M) Calculated over the trailing 6-month period	2.70%	0.54%	+2.16%
Volatility (1Y) Calculated over the trailing 1-year period	3.77%	0.77%	+3.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.80%	0.99%	+4.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.80%	0.83%	+3.97%

VCORX vs. VUBFX - Expense Ratio Comparison

Both VCORX and VUBFX have an expense ratio of 0.20%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

VCORX vs. VUBFX - Dividend Comparison

VCORX's dividend yield for the trailing twelve months is around 4.64%, more than VUBFX's 4.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
VCORX Vanguard Core Bond Fund Investor Shares	4.64%	4.70%	4.93%	3.99%	2.90%	1.91%	2.95%	2.93%	2.98%	2.62%	2.20%
VUBFX Vanguard Ultra-Short-Term Bond Fund Investor Shares	4.42%	4.62%	5.42%	4.06%	1.28%	0.43%	1.52%	2.58%	2.13%	1.43%	0.98%

Frequently Asked Questions

Can I hold both VCORX and VUBFX in my portfolio?

VCORX and VUBFX have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VCORX or VUBFX?

VCORX has higher volatility (1.35%) compared to VUBFX (0.17%). In terms of maximum drawdown, VCORX dropped -18.14% vs VUBFX's -1.86%.

Which has better risk-adjusted returns?

VUBFX currently has the higher Sharpe Ratio (5.71 vs 1.51), 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.