VCOBX vs. HABDX

Last updated Jun 4, 2026

VCOBX (Vanguard Core Bond Fund Admiral Shares) and HABDX (Harbor Core Plus Fund) are both mutual funds - VCOBX is a Total Bond Market fund managed by Vanguard, while HABDX is a Intermediate Core-Plus Bond fund managed by Harbor. Over the past 10 years, VCOBX returned 2.19%/yr vs 2.28%/yr for HABDX. With a 0.95 correlation, they move nearly in lockstep. VCOBX charges 0.10%/yr vs 0.38%/yr for HABDX.

Performance

VCOBX vs. HABDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Core Bond Fund Admiral Shares (VCOBX) and Harbor Core Plus Fund (HABDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VCOBX achieves a 0.60% return, which is significantly lower than HABDX's 0.68% return. Both investments have delivered pretty close results over the past 10 years, with VCOBX having a 2.19% annualized return and HABDX not far ahead at 2.28%.

VCOBX

• 1D: 0.00%
• 1M: 0.56%
• YTD: 0.60%
• 6M: 0.47%
• 1Y: 5.73%
• 3Y*: 4.90%
• 5Y*: 0.65%
• 10Y*: 2.19%

HABDX

• 1D: 0.10%
• 1M: 0.65%
• YTD: 0.68%
• 6M: 0.56%
• 1Y: 5.80%
• 3Y*: 4.72%
• 5Y*: 0.72%
• 10Y*: 2.28%

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

VCOBX vs. HABDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VCOBX Vanguard Core Bond Fund Admiral Shares	0.60%	7.73%	2.21%	6.39%	-13.13%	-1.51%	10.41%	9.64%	-0.85%	3.89%
HABDX Harbor Core Plus Fund	0.68%	7.28%	2.56%	6.70%	-13.23%	-0.64%	8.88%	8.42%	-0.20%	4.89%

Correlation

The correlation between VCOBX and HABDX is 0.97 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.97
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Mar 31, 2016	0.95

The correlation between VCOBX and HABDX has been stable across timeframes, ranging from 0.95 to 0.98 - a consistent structural relationship.

Return for Risk

VCOBX vs. HABDX — Risk / Return Rank

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

VCOBX

VCOBX Risk / Return Rank: 31
VCOBX Sharpe Ratio Rank: 30
VCOBX Sortino Ratio Rank: 32
VCOBX Omega Ratio Rank: 30
VCOBX Calmar Ratio Rank: 34
VCOBX Martin Ratio Rank: 27

HABDX

HABDX Risk / Return Rank: 30
HABDX Sharpe Ratio Rank: 30
HABDX Sortino Ratio Rank: 32
HABDX Omega Ratio Rank: 29
HABDX Calmar Ratio Rank: 32
HABDX Martin Ratio Rank: 27

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.

VCOBX vs. HABDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Core Bond Fund Admiral Shares (VCOBX) and Harbor Core Plus Fund (HABDX). 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.

	VCOBX	HABDX	Difference
Sharpe ratio: Return per unit of total volatility	1.57	1.57	0.00
Sortino ratio: Return per unit of downside risk	2.34	2.36	-0.02
Omega ratio: Gain probability vs. loss probability	1.29	1.28	0.00
Calmar ratio: Return relative to maximum drawdown	2.20	2.14	+0.06
Martin ratio: Return relative to average drawdown	6.56	6.43	+0.14
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VCOBX vs. HABDX - Sharpe Ratio Comparison

The current VCOBX Sharpe Ratio is 1.57, which is comparable to the HABDX Sharpe Ratio of 1.57. The chart below compares the historical Sharpe Ratios of VCOBX and HABDX, 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

	VCOBX	HABDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.57	1.57	0.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.11	0.13	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.47	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	1.33	-0.84

Drawdowns

VCOBX vs. HABDX - Drawdown Comparison

The maximum VCOBX drawdown since its inception was -18.14%, roughly equal to the maximum HABDX drawdown of -17.94%. Use the drawdown chart below to compare losses from any high point for VCOBX and HABDX.

Drawdown Indicators

	VCOBX	HABDX	Difference
Max Drawdown Largest peak-to-trough decline	-18.14%	-17.94%	-0.20%
Max Drawdown (1Y) Largest decline over 1 year	-2.62%	-2.73%	+0.11%
Max Drawdown (3Y) Largest decline over 3 years	-5.63%	-6.15%	+0.52%
Max Drawdown (5Y) Largest decline over 5 years	-18.03%	-17.94%	-0.09%
Max Drawdown (10Y) Largest decline over 10 years	-18.14%	-17.94%	-0.20%
Current Drawdown Current decline from peak	-1.25%	-1.22%	-0.03%
Average Drawdown Average peak-to-trough decline	-4.18%	-1.87%	-2.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.88%	0.90%	-0.02%

Volatility

VCOBX vs. HABDX - Volatility Comparison

Vanguard Core Bond Fund Admiral Shares (VCOBX) and Harbor Core Plus Fund (HABDX) have volatilities of 1.33% and 1.27%, 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

	VCOBX	HABDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.33%	1.27%	+0.06%
Volatility (6M) Calculated over the trailing 6-month period	2.66%	2.59%	+0.07%
Volatility (1Y) Calculated over the trailing 1-year period	3.68%	3.72%	-0.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.78%	5.68%	+0.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.76%	4.83%	-0.07%

VCOBX vs. HABDX - Expense Ratio Comparison

VCOBX has a 0.10% expense ratio, which is lower than HABDX's 0.38% expense ratio.

Dividends

VCOBX vs. HABDX - Dividend Comparison

VCOBX's dividend yield for the trailing twelve months is around 4.73%, which matches HABDX's 4.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
HABDX Harbor Core Plus Fund	4.70%	4.65%	4.46%	4.24%	3.41%	3.12%	3.27%	3.19%	3.08%	3.41%	3.86%	5.40%
VCOBX Vanguard Core Bond Fund Admiral Shares	4.73%	4.80%	5.04%	4.44%	3.01%	1.23%	3.09%	3.08%	3.10%	2.20%	2.29%	0.00%

Frequently Asked Questions

Can I hold both VCOBX and HABDX in my portfolio?

With a correlation of 0.97, VCOBX and HABDX 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, VCOBX or HABDX?

VCOBX has higher volatility (1.33%) compared to HABDX (1.27%). In terms of maximum drawdown, VCOBX dropped -18.14% vs HABDX's -17.94%.

Which has better risk-adjusted returns?

HABDX currently has the higher Sharpe Ratio (1.57 vs 1.57), 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.