WFIOX vs. ESPAX

Last updated Jun 5, 2026

WFIOX (Allspring Index Fund) and ESPAX (Allspring Special Small Cap Value Fund) are both mutual funds - WFIOX is a Large Cap Blend Equities fund managed by Allspring Global Investments, while ESPAX is a Small Cap Value Equities fund managed by Allspring Global Investments. Over the past 10 years, WFIOX returned 15.33%/yr vs 7.85%/yr for ESPAX. A 0.76 correlation means they provide meaningful diversification when combined. WFIOX charges 0.25%/yr vs 1.24%/yr for ESPAX.

Performance

WFIOX vs. ESPAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Allspring Index Fund (WFIOX) and Allspring Special Small Cap Value Fund (ESPAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WFIOX achieves a 10.77% return, which is significantly higher than ESPAX's 8.39% return. Over the past 10 years, WFIOX has outperformed ESPAX with an annualized return of 15.33%, while ESPAX has yielded a comparatively lower 7.85% annualized return.

WFIOX

• 1D: -0.73%
• 1M: 4.16%
• YTD: 10.77%
• 6M: 10.65%
• 1Y: 27.70%
• 3Y*: 22.14%
• 5Y*: 13.63%
• 10Y*: 15.33%

ESPAX

• 1D: -0.94%
• 1M: -0.89%
• YTD: 8.39%
• 6M: 8.05%
• 1Y: 15.13%
• 3Y*: 8.45%
• 5Y*: 2.97%
• 10Y*: 7.85%

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

WFIOX vs. ESPAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WFIOX Allspring Index Fund	10.77%	17.57%	24.66%	26.01%	-18.30%	28.34%	17.74%	31.55%	-4.49%	21.59%
ESPAX Allspring Special Small Cap Value Fund	8.39%	-3.10%	6.44%	18.65%	-13.94%	27.61%	1.16%	28.03%	-13.77%	11.08%

Correlation

The correlation between WFIOX and ESPAX is 0.62, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.74
Correlation (10Y) Calculated over the trailing 10-year period	0.74
Correlation (All Time) Calculated using the full available price history since May 11, 1993	0.76

The correlation between WFIOX and ESPAX shifts across timeframes, from 0.62 (1 year) to 0.76 (all time), reflecting how their relationship changes across market environments.

Return for Risk

WFIOX vs. ESPAX — Risk / Return Rank

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

WFIOX

WFIOX Risk / Return Rank: 66
WFIOX Sharpe Ratio Rank: 65
WFIOX Sortino Ratio Rank: 59
WFIOX Omega Ratio Rank: 60
WFIOX Calmar Ratio Rank: 67
WFIOX Martin Ratio Rank: 79

ESPAX

ESPAX Risk / Return Rank: 11
ESPAX Sharpe Ratio Rank: 11
ESPAX Sortino Ratio Rank: 12
ESPAX Omega Ratio Rank: 10
ESPAX Calmar Ratio Rank: 12
ESPAX Martin Ratio Rank: 11

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.

WFIOX vs. ESPAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Allspring Index Fund (WFIOX) and Allspring Special Small Cap Value Fund (ESPAX). 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.

	WFIOX	ESPAX	Difference
Sharpe ratio: Return per unit of total volatility	2.35	0.82	+1.52
Sortino ratio: Return per unit of downside risk	3.21	1.35	+1.86
Omega ratio: Gain probability vs. loss probability	1.43	1.15	+0.27
Calmar ratio: Return relative to maximum drawdown	3.12	1.07	+2.05
Martin ratio: Return relative to average drawdown	14.55	3.13	+11.42
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WFIOX vs. ESPAX - Sharpe Ratio Comparison

The current WFIOX Sharpe Ratio is 2.35, which is higher than the ESPAX Sharpe Ratio of 0.82. The chart below compares the historical Sharpe Ratios of WFIOX and ESPAX, 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

	WFIOX	ESPAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.35	0.82	+1.52
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.81	0.15	+0.66
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.85	0.37	+0.48
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.44	+0.06

Drawdowns

WFIOX vs. ESPAX - Drawdown Comparison

The maximum WFIOX drawdown since its inception was -54.40%, smaller than the maximum ESPAX drawdown of -61.14%. Use the drawdown chart below to compare losses from any high point for WFIOX and ESPAX.

Drawdown Indicators

	WFIOX	ESPAX	Difference
Max Drawdown Largest peak-to-trough decline	-54.40%	-61.14%	+6.74%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-13.58%	+4.65%
Max Drawdown (3Y) Largest decline over 3 years	-18.78%	-24.80%	+6.02%
Max Drawdown (5Y) Largest decline over 5 years	-24.63%	-26.84%	+2.21%
Max Drawdown (10Y) Largest decline over 10 years	-33.94%	-43.28%	+9.34%
Current Drawdown Current decline from peak	-0.73%	-3.57%	+2.84%
Average Drawdown Average peak-to-trough decline	-9.67%	-9.15%	-0.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.91%	4.64%	-2.73%

Volatility

WFIOX vs. ESPAX - Volatility Comparison

The current volatility for Allspring Index Fund (WFIOX) is 2.92%, while Allspring Special Small Cap Value Fund (ESPAX) has a volatility of 5.04%. This indicates that WFIOX experiences smaller price fluctuations and is considered to be less risky than ESPAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WFIOX	ESPAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.92%	5.04%	-2.12%
Volatility (6M) Calculated over the trailing 6-month period	8.98%	12.21%	-3.23%
Volatility (1Y) Calculated over the trailing 1-year period	11.88%	17.78%	-5.90%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.91%	20.21%	-3.30%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.14%	21.40%	-3.26%

WFIOX vs. ESPAX - Expense Ratio Comparison

WFIOX has a 0.25% expense ratio, which is lower than ESPAX's 1.24% expense ratio.

Dividends

WFIOX vs. ESPAX - Dividend Comparison

WFIOX's dividend yield for the trailing twelve months is around 6.36%, less than ESPAX's 7.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ESPAX Allspring Special Small Cap Value Fund	7.62%	8.26%	10.10%	2.07%	6.24%	6.34%	0.39%	1.68%	7.90%	5.33%	2.25%	2.33%
WFIOX Allspring Index Fund	6.36%	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 ESPAX in my portfolio?

WFIOX and ESPAX have a correlation of 0.62, 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 ESPAX?

ESPAX has higher volatility (5.04%) compared to WFIOX (2.92%). In terms of maximum drawdown, WFIOX dropped -54.40% vs ESPAX's -61.14%.

Which has better risk-adjusted returns?

WFIOX currently has the higher Sharpe Ratio (2.35 vs 0.82), 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.