PENNX vs. WEMMX

Last updated Jun 4, 2026

PENNX (Royce Pennsylvania Mutual Fund) and WEMMX (TETON Westwood Mighty Mites Fund) are both Small Cap Blend Equities funds. Over the past 10 years, PENNX returned 11.88%/yr vs 9.29%/yr for WEMMX. Their correlation of 0.88 suggests significant overlap in exposure. PENNX charges 0.92%/yr vs 1.41%/yr for WEMMX.

Performance

PENNX vs. WEMMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Royce Pennsylvania Mutual Fund (PENNX) and TETON Westwood Mighty Mites Fund (WEMMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PENNX achieves a 17.21% return, which is significantly lower than WEMMX's 21.19% return. Over the past 10 years, PENNX has outperformed WEMMX with an annualized return of 11.88%, while WEMMX has yielded a comparatively lower 9.29% annualized return.

PENNX

• 1D: 0.84%
• 1M: 3.54%
• YTD: 17.21%
• 6M: 16.67%
• 1Y: 33.08%
• 3Y*: 16.39%
• 5Y*: 8.31%
• 10Y*: 11.88%

WEMMX

• 1D: 0.87%
• 1M: 5.74%
• YTD: 21.19%
• 6M: 22.91%
• 1Y: 37.84%
• 3Y*: 15.60%
• 5Y*: 5.64%
• 10Y*: 9.29%

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

PENNX vs. WEMMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PENNX Royce Pennsylvania Mutual Fund	17.21%	9.02%	7.02%	26.82%	-17.18%	21.49%	14.11%	26.61%	-9.94%	16.00%
WEMMX TETON Westwood Mighty Mites Fund	21.19%	11.02%	3.83%	13.53%	-15.37%	21.44%	10.02%	16.94%	-13.69%	15.47%

Correlation

The correlation between PENNX and WEMMX is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since May 12, 1998	0.88

The correlation between PENNX and WEMMX has been stable across timeframes, ranging from 0.88 to 0.94 - a consistent structural relationship.

Return for Risk

PENNX vs. WEMMX — Risk / Return Rank

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

PENNX

PENNX Risk / Return Rank: 53
PENNX Sharpe Ratio Rank: 45
PENNX Sortino Ratio Rank: 45
PENNX Omega Ratio Rank: 40
PENNX Calmar Ratio Rank: 76
PENNX Martin Ratio Rank: 61

WEMMX

WEMMX Risk / Return Rank: 65
WEMMX Sharpe Ratio Rank: 59
WEMMX Sortino Ratio Rank: 60
WEMMX Omega Ratio Rank: 49
WEMMX Calmar Ratio Rank: 88
WEMMX Martin Ratio Rank: 69

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.

PENNX vs. WEMMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Royce Pennsylvania Mutual Fund (PENNX) and TETON Westwood Mighty Mites Fund (WEMMX). 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.

	PENNX	WEMMX	Difference
Sharpe ratio: Return per unit of total volatility	1.96	2.28	-0.31
Sortino ratio: Return per unit of downside risk	2.83	3.25	-0.42
Omega ratio: Gain probability vs. loss probability	1.34	1.38	-0.05
Calmar ratio: Return relative to maximum drawdown	3.45	4.31	-0.86
Martin ratio: Return relative to average drawdown	12.02	13.24	-1.22
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PENNX vs. WEMMX - Sharpe Ratio Comparison

The current PENNX Sharpe Ratio is 1.96, which is comparable to the WEMMX Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of PENNX and WEMMX, 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

	PENNX	WEMMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.96	2.28	-0.31
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.40	0.30	+0.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.55	0.46	+0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.64	-0.14

Drawdowns

PENNX vs. WEMMX - Drawdown Comparison

The maximum PENNX drawdown since its inception was -57.00%, which is greater than WEMMX's maximum drawdown of -42.48%. Use the drawdown chart below to compare losses from any high point for PENNX and WEMMX.

Drawdown Indicators

	PENNX	WEMMX	Difference
Max Drawdown Largest peak-to-trough decline	-57.00%	-42.48%	-14.52%
Max Drawdown (1Y) Largest decline over 1 year	-10.21%	-9.31%	-0.90%
Max Drawdown (3Y) Largest decline over 3 years	-26.42%	-21.44%	-4.98%
Max Drawdown (5Y) Largest decline over 5 years	-27.58%	-27.11%	-0.47%
Max Drawdown (10Y) Largest decline over 10 years	-41.10%	-41.73%	+0.63%
Current Drawdown Current decline from peak	-0.37%	0.00%	-0.37%
Average Drawdown Average peak-to-trough decline	-9.40%	-6.62%	-2.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.93%	3.02%	-0.09%

Volatility

PENNX vs. WEMMX - Volatility Comparison

Royce Pennsylvania Mutual Fund (PENNX) and TETON Westwood Mighty Mites Fund (WEMMX) have volatilities of 5.45% and 5.22%, 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

	PENNX	WEMMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.45%	5.22%	+0.23%
Volatility (6M) Calculated over the trailing 6-month period	13.08%	12.44%	+0.64%
Volatility (1Y) Calculated over the trailing 1-year period	17.99%	17.64%	+0.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.73%	18.92%	+1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.57%	20.45%	+1.12%

PENNX vs. WEMMX - Expense Ratio Comparison

PENNX has a 0.92% expense ratio, which is lower than WEMMX's 1.41% expense ratio.

Dividends

PENNX vs. WEMMX - Dividend Comparison

PENNX's dividend yield for the trailing twelve months is around 5.72%, less than WEMMX's 18.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PENNX Royce Pennsylvania Mutual Fund	5.72%	6.70%	9.35%	4.91%	5.19%	28.20%	5.05%	3.85%	23.68%	21.27%	7.15%	23.31%
WEMMX TETON Westwood Mighty Mites Fund	18.82%	22.80%	26.79%	18.86%	13.60%	15.44%	9.23%	4.11%	4.16%	6.44%	4.61%	2.35%

Frequently Asked Questions

Can I hold both PENNX and WEMMX in my portfolio?

With a correlation of 0.92, PENNX and WEMMX 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, PENNX or WEMMX?

PENNX has higher volatility (5.45%) compared to WEMMX (5.22%). In terms of maximum drawdown, PENNX dropped -57.00% vs WEMMX's -42.48%.

Which has better risk-adjusted returns?

WEMMX currently has the higher Sharpe Ratio (2.28 vs 1.96), 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.