VCPIX vs. PDRDX

Last updated Jun 13, 2026

VCPIX (Vanguard Core-Plus Bond Fund Investor Shares) and PDRDX (Principal Diversified Real Asset Fund) are both mutual funds - VCPIX is a Total Bond Market fund managed by Vanguard, while PDRDX is a Global Allocation fund managed by Principal. Over the past 3 years, VCPIX returned 5.30%/yr vs 10.82%/yr for PDRDX. At a 0.34 correlation, their price movements are largely independent. VCPIX charges 0.30%/yr vs 0.83%/yr for PDRDX.

Performance

VCPIX vs. PDRDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Core-Plus Bond Fund Investor Shares (VCPIX) and Principal Diversified Real Asset Fund (PDRDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VCPIX achieves a 0.73% return, which is significantly lower than PDRDX's 11.44% return.

VCPIX

• 1D: 0.47%
• 1M: 0.51%
• YTD: 0.73%
• 6M: 1.25%
• 1Y: 5.54%
• 3Y*: 5.30%
• 5Y*: —
• 10Y*: —

PDRDX

• 1D: 0.74%
• 1M: -2.51%
• YTD: 11.44%
• 6M: 12.28%
• 1Y: 19.27%
• 3Y*: 10.82%
• 5Y*: 5.81%
• 10Y*: 6.35%

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

VCPIX vs. PDRDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
VCPIX Vanguard Core-Plus Bond Fund Investor Shares	0.73%	8.01%	2.83%	6.64%	-12.68%	0.35%
PDRDX Principal Diversified Real Asset Fund	11.44%	14.63%	3.09%	3.22%	-6.19%	2.01%

Correlation

The correlation between VCPIX and PDRDX is 0.33, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.33
Correlation (3Y) Calculated over the trailing 3-year period	0.40
Correlation (All Time) Calculated using the full available price history since Oct 14, 2021	0.34

Return for Risk

VCPIX vs. PDRDX — Risk / Return Rank

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

VCPIX

VCPIX Risk / Return Rank: 44
VCPIX Sharpe Ratio Rank: 46
VCPIX Sortino Ratio Rank: 51
VCPIX Omega Ratio Rank: 46
VCPIX Calmar Ratio Rank: 42
VCPIX Martin Ratio Rank: 35

PDRDX

PDRDX Risk / Return Rank: 79
PDRDX Sharpe Ratio Rank: 76
PDRDX Sortino Ratio Rank: 73
PDRDX Omega Ratio Rank: 74
PDRDX Calmar Ratio Rank: 84
PDRDX Martin Ratio Rank: 87

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.

VCPIX vs. PDRDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Core-Plus Bond Fund Investor Shares (VCPIX) and Principal Diversified Real Asset Fund (PDRDX). 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.

	VCPIX	PDRDX	Difference
Sharpe ratio: Return per unit of total volatility	1.58	2.13	-0.55
Sortino ratio: Return per unit of downside risk	2.36	2.92	-0.56
Omega ratio: Gain probability vs. loss probability	1.29	1.39	-0.10
Calmar ratio: Return relative to maximum drawdown	2.05	3.38	-1.33
Martin ratio: Return relative to average drawdown	6.44	13.83	-7.39

VCPIX vs. PDRDX - Sharpe Ratio Comparison

The current VCPIX Sharpe Ratio is 1.58, which is comparable to the PDRDX Sharpe Ratio of 2.13. The chart below compares the historical Sharpe Ratios of VCPIX and PDRDX, 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

VCPIX vs. PDRDX - Drawdown Comparison

The maximum VCPIX drawdown since its inception was -17.33%, smaller than the maximum PDRDX drawdown of -28.55%. Use the drawdown chart below to compare losses from any high point for VCPIX and PDRDX.

Drawdown Indicators

	VCPIX	PDRDX	Difference
Max Drawdown Largest peak-to-trough decline	-17.33%	-28.55%	+11.22%
Max Drawdown (1Y) Largest decline over 1 year	-2.72%	-5.88%	+3.16%
Max Drawdown (3Y) Largest decline over 3 years	-5.68%	-10.94%	+5.26%
Max Drawdown (5Y) Largest decline over 5 years	—	-19.35%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-28.55%	—
Current Drawdown Current decline from peak	-1.01%	-2.93%	+1.92%
Average Drawdown Average peak-to-trough decline	-6.56%	-5.97%	-0.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.86%	1.43%	-0.57%

Volatility

VCPIX vs. PDRDX - Volatility Comparison

The current volatility for Vanguard Core-Plus Bond Fund Investor Shares (VCPIX) is 1.22%, while Principal Diversified Real Asset Fund (PDRDX) has a volatility of 2.94%. This indicates that VCPIX experiences smaller price fluctuations and is considered to be less risky than PDRDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VCPIX	PDRDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.22%	2.94%	-1.72%
Volatility (6M) Calculated over the trailing 6-month period	2.66%	7.83%	-5.17%
Volatility (1Y) Calculated over the trailing 1-year period	3.52%	9.31%	-5.79%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.68%	11.02%	-5.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.68%	10.81%	-5.13%

VCPIX vs. PDRDX - Expense Ratio Comparison

VCPIX has a 0.30% expense ratio, which is lower than PDRDX's 0.83% expense ratio.

Dividends

VCPIX vs. PDRDX - Dividend Comparison

VCPIX's dividend yield for the trailing twelve months is around 4.74%, more than PDRDX's 3.85% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PDRDX Principal Diversified Real Asset Fund	3.85%	4.19%	2.43%	2.52%	12.88%	6.56%	0.52%	2.36%	3.47%	2.21%	2.61%	0.99%
VCPIX Vanguard Core-Plus Bond Fund Investor Shares	4.74%	4.76%	5.08%	4.46%	3.15%	0.25%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both VCPIX and PDRDX in my portfolio?

VCPIX and PDRDX have a correlation of 0.33, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VCPIX or PDRDX?

PDRDX has higher volatility (2.94%) compared to VCPIX (1.22%). In terms of maximum drawdown, VCPIX dropped -17.33% vs PDRDX's -28.55%.

Which has better risk-adjusted returns?

PDRDX currently has the higher Sharpe Ratio (2.13 vs 1.58), 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.