MDFGX vs. WFSPX

Last updated Jun 4, 2026

MDFGX (BlackRock Capital Appreciation Fund) and WFSPX (iShares S&P 500 Index Fund) are both mutual funds - MDFGX is a Large Cap Growth Equities fund managed by BlackRock, while WFSPX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, MDFGX returned 17.19%/yr vs 15.54%/yr for WFSPX. Their correlation of 0.92 suggests significant overlap in exposure. MDFGX charges 0.97%/yr vs 0.03%/yr for WFSPX.

Performance

MDFGX vs. WFSPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Capital Appreciation Fund (MDFGX) and iShares S&P 500 Index Fund (WFSPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MDFGX achieves a 15.58% return, which is significantly higher than WFSPX's 11.69% return. Over the past 10 years, MDFGX has outperformed WFSPX with an annualized return of 17.19%, while WFSPX has yielded a comparatively lower 15.54% annualized return.

MDFGX

• 1D: -0.05%
• 1M: 8.97%
• YTD: 15.58%
• 6M: 14.91%
• 1Y: 28.44%
• 3Y*: 25.84%
• 5Y*: 12.67%
• 10Y*: 17.19%

WFSPX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.69%
• 6M: 11.72%
• 1Y: 28.93%
• 3Y*: 22.71%
• 5Y*: 14.24%
• 10Y*: 15.54%

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

MDFGX vs. WFSPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MDFGX BlackRock Capital Appreciation Fund	15.58%	12.63%	31.58%	48.77%	-37.83%	20.78%	40.16%	31.89%	1.81%	32.37%
WFSPX iShares S&P 500 Index Fund	11.69%	17.83%	24.94%	26.25%	-18.14%	28.63%	18.43%	31.45%	-4.83%	21.27%

Correlation

The correlation between MDFGX and WFSPX is 0.90, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.90
Correlation (All Time) Calculated using the full available price history since Jun 21, 1996	0.92

The correlation between MDFGX and WFSPX has been stable across timeframes, ranging from 0.89 to 0.92 - a consistent structural relationship.

Return for Risk

MDFGX vs. WFSPX — Risk / Return Rank

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

MDFGX

MDFGX Risk / Return Rank: 28
MDFGX Sharpe Ratio Rank: 34
MDFGX Sortino Ratio Rank: 30
MDFGX Omega Ratio Rank: 31
MDFGX Calmar Ratio Rank: 22
MDFGX Martin Ratio Rank: 24

WFSPX

WFSPX Risk / Return Rank: 73
WFSPX Sharpe Ratio Rank: 75
WFSPX Sortino Ratio Rank: 67
WFSPX Omega Ratio Rank: 67
WFSPX Calmar Ratio Rank: 74
WFSPX Martin Ratio Rank: 83

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.

MDFGX vs. WFSPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Capital Appreciation Fund (MDFGX) and iShares S&P 500 Index Fund (WFSPX). 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.

	MDFGX	WFSPX	Difference
Sharpe ratio Return per unit of total volatility	1.69	2.52	-0.83
Sortino ratio Return per unit of downside risk	2.27	3.42	-1.15
Omega ratio Gain probability vs. loss probability	1.29	1.46	-0.16
Calmar ratio Return relative to maximum drawdown	1.74	3.35	-1.61
Martin ratio Return relative to average drawdown	5.94	15.65	-9.71
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MDFGX vs. WFSPX - Sharpe Ratio Comparison

The current MDFGX Sharpe Ratio is 1.69, which is lower than the WFSPX Sharpe Ratio of 2.52. The chart below compares the historical Sharpe Ratios of MDFGX and WFSPX, 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

	MDFGX	WFSPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.69	2.52	-0.83
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.54	0.85	-0.30
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.77	0.87	-0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.13	+0.32

Drawdowns

MDFGX vs. WFSPX - Drawdown Comparison

The maximum MDFGX drawdown since its inception was -47.99%, smaller than the maximum WFSPX drawdown of -58.21%. Use the drawdown chart below to compare losses from any high point for MDFGX and WFSPX.

Drawdown Indicators

	MDFGX	WFSPX	Difference
Max Drawdown Largest peak-to-trough decline	-47.99%	-58.21%	+10.22%
Max Drawdown (1Y) Largest decline over 1 year	-16.74%	-8.90%	-7.84%
Max Drawdown (3Y) Largest decline over 3 years	-24.43%	-18.74%	-5.69%
Max Drawdown (5Y) Largest decline over 5 years	-42.49%	-24.51%	-17.98%
Max Drawdown (10Y) Largest decline over 10 years	-42.49%	-33.74%	-8.75%
Current Drawdown Current decline from peak	-0.05%	0.00%	-0.05%
Average Drawdown Average peak-to-trough decline	-11.22%	-12.77%	+1.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.91%	1.90%	+3.01%

Volatility

MDFGX vs. WFSPX - Volatility Comparison

BlackRock Capital Appreciation Fund (MDFGX) has a higher volatility of 4.05% compared to iShares S&P 500 Index Fund (WFSPX) at 2.82%. This indicates that MDFGX's price experiences larger fluctuations and is considered to be riskier than WFSPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MDFGX	WFSPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.05%	2.82%	+1.23%
Volatility (6M) Calculated over the trailing 6-month period	13.44%	8.97%	+4.47%
Volatility (1Y) Calculated over the trailing 1-year period	17.33%	11.85%	+5.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.45%	16.88%	+6.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.52%	18.02%	+4.50%

MDFGX vs. WFSPX - Expense Ratio Comparison

MDFGX has a 0.97% expense ratio, which is higher than WFSPX's 0.03% expense ratio.

Dividends

MDFGX vs. WFSPX - Dividend Comparison

MDFGX's dividend yield for the trailing twelve months is around 16.88%, more than WFSPX's 1.56% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MDFGX BlackRock Capital Appreciation Fund	16.88%	19.51%	12.73%	3.59%	9.46%	12.95%	5.46%	10.67%	14.31%	12.51%	4.01%	11.22%
WFSPX iShares S&P 500 Index Fund	1.56%	1.72%	1.41%	1.50%	2.02%	1.82%	1.66%	1.99%	2.00%	1.62%	2.37%	2.49%

Frequently Asked Questions

Can I hold both MDFGX and WFSPX in my portfolio?

MDFGX and WFSPX have a correlation of 0.90, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MDFGX or WFSPX?

MDFGX has higher volatility (4.05%) compared to WFSPX (2.82%). In terms of maximum drawdown, MDFGX dropped -47.99% vs WFSPX's -58.21%.

Which has better risk-adjusted returns?

WFSPX currently has the higher Sharpe Ratio (2.52 vs 1.69), 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.