WFIOX vs. VPMAX

Last updated Aug 1, 2026

WFIOX (Allspring Index Fund) and VPMAX (Vanguard PRIMECAP Fund Admiral Shares) are both Large Cap Blend Equities funds. Over the past 10 years, WFIOX returned 14.75%/yr vs 16.66%/yr for VPMAX. Their correlation of 0.94 means they have usually moved in the same direction. WFIOX charges 0.25%/yr vs 0.27%/yr for VPMAX.

Performance

WFIOX vs. VPMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Allspring Index Fund (WFIOX) and Vanguard PRIMECAP Fund Admiral Shares (VPMAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WFIOX achieves a 9.19% return, which is significantly lower than VPMAX's 20.70% return. Over the past 10 years, WFIOX has underperformed VPMAX with an annualized return of 14.75%, while VPMAX has yielded a comparatively higher 16.66% annualized return.

WFIOX

• 1D: 1.66%
• 1M: -0.57%
• 6M: 7.67%
• YTD: 9.19%
• 1Y: 20.32%
• 3Y*: 18.72%
• 5Y*: 12.41%
• 10Y*: 14.75%
• ALL TIME*: 9.14%

VPMAX

• 1D: 2.95%
• 1M: -3.97%
• 6M: 14.66%
• YTD: 20.70%
• 1Y: 47.11%
• 3Y*: 23.43%
• 5Y*: 14.89%
• 10Y*: 16.66%
• ALL TIME*: 12.32%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
VPMAX Vanguard PRIMECAP Fund Admiral Shares	$0.00	$0.00	$0.00
WFIOX Allspring Index Fund	$0.00	$0.00	$0.00

WFIOX vs. VPMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WFIOX Allspring Index Fund	9.19%	17.57%	24.66%	26.01%	-18.30%	28.34%	17.74%	31.55%	-4.49%	21.59%
VPMAX Vanguard PRIMECAP Fund Admiral Shares	20.70%	29.70%	13.30%	28.25%	-15.16%	21.72%	17.23%	27.88%	-1.93%	28.28%

Correlation

The correlation between WFIOX and VPMAX is 0.86, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.86
Correlation (3Y) Balances recent behavior with more history.	0.90
Correlation (5Y) Shows whether the relationship held over a longer period.	0.93
Correlation (10Y) Provides a long-term view across more market conditions.	0.93
Correlation (All Time) Calculated using the full available price history since Nov 12, 2001	0.94

The correlation between WFIOX and VPMAX has been stable across timeframes, ranging from 0.86 to 0.94 - a consistent structural relationship.

Return for Risk

WFIOX vs. VPMAX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

WFIOX

WFIOX Risk / Return Rank: 57
WFIOX Sharpe Ratio Rank: 54
WFIOX Sortino Ratio Rank: 51
WFIOX Omega Ratio Rank: 51
WFIOX Calmar Ratio Rank: 58
WFIOX Martin Ratio Rank: 70

VPMAX

VPMAX Risk / Return Rank: 90
VPMAX Sharpe Ratio Rank: 91
VPMAX Sortino Ratio Rank: 87
VPMAX Omega Ratio Rank: 84
VPMAX Calmar Ratio Rank: 93
VPMAX Martin Ratio Rank: 94

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

WFIOX vs. VPMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Allspring Index Fund (WFIOX) and Vanguard PRIMECAP Fund Admiral Shares (VPMAX). 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.

	WFIOX	VPMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.40	2.29	-0.88
Sortino ratio: Return per unit of downside risk	1.97	3.13	-1.16
Omega ratio: Gain probability vs. loss probability	1.25	1.40	-0.15
Calmar ratio: Return relative to maximum drawdown	2.02	3.73	-1.70
Martin ratio: Return relative to average drawdown	8.65	14.01	-5.36

WFIOX vs. VPMAX - Sharpe Ratio Comparison

The current WFIOX Sharpe Ratio is 1.40, which is lower than the VPMAX Sharpe Ratio of 2.29. The chart below compares the historical Sharpe Ratios of WFIOX and VPMAX, 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

WFIOX vs. VPMAX - Drawdown Comparison

The maximum WFIOX drawdown since its inception was -54.40%, which is greater than VPMAX's maximum drawdown of -48.32%. Use the drawdown chart below to compare losses from any high point for WFIOX and VPMAX.

Drawdown Indicators

	WFIOX	VPMAX	Difference
Max Drawdown Largest peak-to-trough decline	-54.40%	-48.32%	-6.08%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-11.72%	+2.79%
Max Drawdown (3Y) Largest decline over 3 years	-18.78%	-20.55%	+1.77%
Max Drawdown (5Y) Largest decline over 5 years	-24.63%	-25.21%	+0.58%
Max Drawdown (10Y) Largest decline over 10 years	-33.94%	-32.65%	-1.29%
Current Drawdown Current decline from peak	-2.15%	-7.53%	+5.38%
Average Drawdown Average peak-to-trough decline	-9.64%	-6.56%	-3.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.08%	3.12%	-1.04%

Volatility

WFIOX vs. VPMAX - Volatility Comparison

The current volatility for Allspring Index Fund (WFIOX) is 3.45%, while Vanguard PRIMECAP Fund Admiral Shares (VPMAX) has a volatility of 6.29%. This indicates that WFIOX experiences smaller price fluctuations and is considered to be less risky than VPMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WFIOX	VPMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.45%	6.29%	-2.84%
Volatility (6M) Calculated over the trailing 6-month period	10.09%	16.18%	-6.09%
Volatility (1Y) Calculated over the trailing 1-year period	12.85%	19.08%	-6.23%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.02%	18.81%	-1.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.14%	19.39%	-1.25%

WFIOX vs. VPMAX - Expense Ratio Comparison

WFIOX has a 0.25% expense ratio, which is lower than VPMAX's 0.27% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

WFIOX vs. VPMAX - Dividend Comparison

WFIOX's dividend yield for the trailing twelve months is around 6.45%, less than VPMAX's 13.63% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VPMAX Vanguard PRIMECAP Fund Admiral Shares	13.63%	16.46%	6.71%	7.24%	9.94%	10.18%	9.82%	7.23%	8.43%	4.52%	5.13%	5.99%
WFIOX Allspring Index Fund	6.45%	7.04%	8.54%	7.63%	10.41%	9.15%	14.40%	33.14%	33.69%	20.04%	10.07%	8.62%

Frequently Asked Questions

Can I hold both WFIOX and VPMAX in my portfolio?

WFIOX and VPMAX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WFIOX or VPMAX?

VPMAX has higher volatility (6.29%) compared to WFIOX (3.45%). In terms of maximum drawdown, WFIOX dropped -54.40% vs VPMAX's -48.32%.

Which has better risk-adjusted returns?

VPMAX currently has the higher Sharpe Ratio (2.29 vs 1.40), 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.