TRMSX vs. TGFRX

Last updated Apr 2, 2026

Compare and contrast key facts about T. Rowe Price Mid-Cap Index Fund (TRMSX) and Tanaka Growth Fund (TGFRX).

TRMSX is managed by T. Rowe Price. It was launched on Dec 8, 2015. TGFRX is managed by Tanaka. It was launched on Dec 30, 1998.

Performance

TRMSX vs. TGFRX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Mid-Cap Index Fund (TRMSX) and Tanaka Growth Fund (TGFRX). The values are adjusted to include any dividend payments, if applicable.

TRMSX vs. TGFRX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
TRMSX T. Rowe Price Mid-Cap Index Fund	-2.45%	12.61%	19.98%	29.90%	-28.56%	7.68%
TGFRX Tanaka Growth Fund	2.11%	39.56%	17.98%	50.24%	-22.62%	3.29%

Returns By Period

In the year-to-date period, TRMSX achieves a -2.45% return, which is significantly lower than TGFRX's 2.11% return.

TRMSX

• 1D: 3.41%
• 1M: -5.44%
• YTD: -2.45%
• 6M: -3.15%
• 1Y: 18.13%
• 3Y*: 16.63%
• 5Y*: —
• 10Y*: —

TGFRX

• 1D: 5.92%
• 1M: -7.38%
• YTD: 2.11%
• 6M: 3.42%
• 1Y: 38.93%
• 3Y*: 31.29%
• 5Y*: 11.64%
• 10Y*: 13.73%

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

TRMSX vs. TGFRX - Expense Ratio Comparison

TRMSX has a 0.14% expense ratio, which is lower than TGFRX's 2.19% expense ratio.

TGFRX

Tanaka Growth Fund

TRMSX

T. Rowe Price Mid-Cap Index Fund

Return for Risk

TRMSX vs. TGFRX — Risk / Return Rank

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

TRMSX

TRMSX Risk / Return Rank: 24
TRMSX Sharpe Ratio Rank: 34
TRMSX Sortino Ratio Rank: 39
TRMSX Omega Ratio Rank: 37
TRMSX Calmar Ratio Rank: 5
TRMSX Martin Ratio Rank: 5

TGFRX

TGFRX Risk / Return Rank: 63
TGFRX Sharpe Ratio Rank: 51
TGFRX Sortino Ratio Rank: 55
TGFRX Omega Ratio Rank: 43
TGFRX Calmar Ratio Rank: 92
TGFRX Martin Ratio Rank: 72

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.

TRMSX vs. TGFRX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Mid-Cap Index Fund (TRMSX) and Tanaka Growth Fund (TGFRX). 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.

	TRMSX	TGFRX	Difference
Sharpe ratio Return per unit of total volatility	0.88	1.06	-0.17
Sortino ratio Return per unit of downside risk	1.41	1.59	-0.18
Omega ratio Gain probability vs. loss probability	1.20	1.20	-0.01
Calmar ratio Return relative to maximum drawdown	0.09	2.93	-2.84
Martin ratio Return relative to average drawdown	0.32	7.48	-7.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TRMSX vs. TGFRX - Sharpe Ratio Comparison

The current TRMSX Sharpe Ratio is 0.88, which is comparable to the TGFRX Sharpe Ratio of 1.06. The chart below compares the historical Sharpe Ratios of TRMSX and TGFRX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	TRMSX	TGFRX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.88	1.06	-0.17
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.01	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.02	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.26	0.02	+0.24

Correlation

The correlation between TRMSX and TGFRX is 0.74, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

TRMSX vs. TGFRX - Dividend Comparison

TRMSX's dividend yield for the trailing twelve months is around 6.65%, less than TGFRX's 12.75% yield.

	TTM	2025	2024	2023	2022	2021
TRMSX T. Rowe Price Mid-Cap Index Fund	6.65%	6.49%	1.98%	0.86%	1.92%	4.01%
TGFRX Tanaka Growth Fund	12.75%	13.02%	6.89%	0.00%	0.11%	7.44%

Drawdowns

TRMSX vs. TGFRX - Drawdown Comparison

The maximum TRMSX drawdown since its inception was -37.34%, smaller than the maximum TGFRX drawdown of -95.35%. Use the drawdown chart below to compare losses from any high point for TRMSX and TGFRX.

Drawdown Indicators

	TRMSX	TGFRX	Difference
Max Drawdown Largest peak-to-trough decline	-37.34%	-95.35%	+58.01%
Max Drawdown (1Y) Largest decline over 1 year	-14.85%	-16.01%	+1.16%
Max Drawdown (5Y) Largest decline over 5 years	—	-95.35%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-95.35%	—
Current Drawdown Current decline from peak	-6.43%	-92.38%	+85.95%
Average Drawdown Average peak-to-trough decline	-14.34%	-31.67%	+17.33%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.31%	7.24%	+0.07%

Volatility

TRMSX vs. TGFRX - Volatility Comparison

The current volatility for T. Rowe Price Mid-Cap Index Fund (TRMSX) is 6.71%, while Tanaka Growth Fund (TGFRX) has a volatility of 12.37%. This indicates that TRMSX experiences smaller price fluctuations and is considered to be less risky than TGFRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TRMSX	TGFRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.71%	12.37%	-5.66%
Volatility (6M) Calculated over the trailing 6-month period	13.35%	24.40%	-11.05%
Volatility (1Y) Calculated over the trailing 1-year period	25.34%	35.36%	-10.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.16%	793.45%	-770.29%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.16%	561.16%	-538.00%