WEMMX vs. RYOTX

Last updated Jun 3, 2026

WEMMX (TETON Westwood Mighty Mites Fund) and RYOTX (Royce Micro Cap Series Fund) are both Small Cap Blend Equities funds. Over the past 10 years, WEMMX returned 9.20%/yr vs 13.67%/yr for RYOTX. Their correlation of 0.88 suggests significant overlap in exposure. WEMMX charges 1.41%/yr vs 1.20%/yr for RYOTX.

Performance

WEMMX vs. RYOTX - Performance Comparison

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

Returns By Period

In the year-to-date period, WEMMX achieves a 20.14% return, which is significantly lower than RYOTX's 35.57% return. Over the past 10 years, WEMMX has underperformed RYOTX with an annualized return of 9.20%, while RYOTX has yielded a comparatively higher 13.67% annualized return.

WEMMX

• 1D: 0.00%
• 1M: 3.68%
• YTD: 20.14%
• 6M: 23.78%
• 1Y: 38.71%
• 3Y*: 15.26%
• 5Y*: 5.43%
• 10Y*: 9.20%

RYOTX

• 1D: 0.74%
• 1M: 6.47%
• YTD: 35.57%
• 6M: 39.50%
• 1Y: 70.03%
• 3Y*: 25.82%
• 5Y*: 11.03%
• 10Y*: 13.67%

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

WEMMX vs. RYOTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WEMMX TETON Westwood Mighty Mites Fund	20.14%	11.02%	3.83%	13.53%	-15.37%	21.44%	10.02%	16.94%	-13.69%	15.47%
RYOTX Royce Micro Cap Series Fund	35.57%	13.51%	13.24%	19.51%	-22.66%	30.36%	24.56%	21.19%	-9.09%	5.29%

Correlation

The correlation between WEMMX and RYOTX 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	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since May 12, 1998	0.88

The correlation between WEMMX and RYOTX has been stable across timeframes, ranging from 0.88 to 0.93 - a consistent structural relationship.

Return for Risk

WEMMX vs. RYOTX — Risk / Return Rank

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

WEMMX

WEMMX Risk / Return Rank: 60
WEMMX Sharpe Ratio Rank: 53
WEMMX Sortino Ratio Rank: 54
WEMMX Omega Ratio Rank: 45
WEMMX Calmar Ratio Rank: 85
WEMMX Martin Ratio Rank: 62

RYOTX

RYOTX Risk / Return Rank: 87
RYOTX Sharpe Ratio Rank: 92
RYOTX Sortino Ratio Rank: 82
RYOTX Omega Ratio Rank: 72
RYOTX Calmar Ratio Rank: 95
RYOTX Martin Ratio Rank: 93

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.

WEMMX vs. RYOTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TETON Westwood Mighty Mites Fund (WEMMX) and Royce Micro Cap Series Fund (RYOTX). 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.

	WEMMX	RYOTX	Difference
Sharpe ratio Return per unit of total volatility	2.15	3.07	-0.92
Sortino ratio Return per unit of downside risk	3.09	3.87	-0.77
Omega ratio Gain probability vs. loss probability	1.36	1.48	-0.12
Calmar ratio Return relative to maximum drawdown	3.99	5.62	-1.63
Martin ratio Return relative to average drawdown	12.27	20.58	-8.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WEMMX vs. RYOTX - Sharpe Ratio Comparison

The current WEMMX Sharpe Ratio is 2.15, which is lower than the RYOTX Sharpe Ratio of 3.07. The chart below compares the historical Sharpe Ratios of WEMMX and RYOTX, 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

	WEMMX	RYOTX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.15	3.07	-0.92
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.29	0.47	-0.19
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.59	-0.14
Sharpe Ratio (All Time) Calculated using the full available price history	0.64	0.62	+0.02

Drawdowns

WEMMX vs. RYOTX - Drawdown Comparison

The maximum WEMMX drawdown since its inception was -42.48%, smaller than the maximum RYOTX drawdown of -56.86%. Use the drawdown chart below to compare losses from any high point for WEMMX and RYOTX.

Drawdown Indicators

	WEMMX	RYOTX	Difference
Max Drawdown Largest peak-to-trough decline	-42.48%	-56.86%	+14.38%
Max Drawdown (1Y) Largest decline over 1 year	-9.31%	-12.10%	+2.79%
Max Drawdown (3Y) Largest decline over 3 years	-21.44%	-29.83%	+8.39%
Max Drawdown (5Y) Largest decline over 5 years	-27.11%	-35.84%	+8.73%
Max Drawdown (10Y) Largest decline over 10 years	-41.73%	-44.87%	+3.14%
Current Drawdown Current decline from peak	-0.58%	0.00%	-0.58%
Average Drawdown Average peak-to-trough decline	-6.62%	-9.43%	+2.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.02%	3.31%	-0.29%

Volatility

WEMMX vs. RYOTX - Volatility Comparison

The current volatility for TETON Westwood Mighty Mites Fund (WEMMX) is 5.18%, while Royce Micro Cap Series Fund (RYOTX) has a volatility of 5.98%. This indicates that WEMMX experiences smaller price fluctuations and is considered to be less risky than RYOTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WEMMX	RYOTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.18%	5.98%	-0.80%
Volatility (6M) Calculated over the trailing 6-month period	12.42%	16.14%	-3.72%
Volatility (1Y) Calculated over the trailing 1-year period	17.66%	22.84%	-5.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.92%	23.43%	-4.51%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.45%	23.14%	-2.69%

WEMMX vs. RYOTX - Expense Ratio Comparison

WEMMX has a 1.41% expense ratio, which is higher than RYOTX's 1.20% expense ratio.

Dividends

WEMMX vs. RYOTX - Dividend Comparison

WEMMX's dividend yield for the trailing twelve months is around 18.98%, more than RYOTX's 11.02% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RYOTX Royce Micro Cap Series Fund	11.02%	14.94%	12.20%	6.97%	5.10%	23.10%	7.40%	2.72%	13.95%	7.76%	11.41%	12.99%
WEMMX TETON Westwood Mighty Mites Fund	18.98%	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 WEMMX and RYOTX in my portfolio?

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

RYOTX has higher volatility (5.98%) compared to WEMMX (5.18%). In terms of maximum drawdown, WEMMX dropped -42.48% vs RYOTX's -56.86%.

Which has better risk-adjusted returns?

RYOTX currently has the higher Sharpe Ratio (3.07 vs 2.15), 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.