PARMX vs. FTSIX

Last updated Apr 4, 2026

Compare and contrast key facts about Parnassus Mid Cap Fund (PARMX) and Fuller & Thaler Behavioral Small-Mid Core Equity Fund (FTSIX).

PARMX is managed by Parnassus. It was launched on Apr 29, 2005. FTSIX is managed by Fuller & Thaler Asset Mgmt. It was launched on Dec 26, 2018.

Performance

PARMX vs. FTSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Parnassus Mid Cap Fund (PARMX) and Fuller & Thaler Behavioral Small-Mid Core Equity Fund (FTSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PARMX achieves a -1.30% return, which is significantly lower than FTSIX's 6.94% return.

PARMX

• 1D: 0.08%
• 1M: -3.59%
• YTD: -1.30%
• 6M: -0.62%
• 1Y: 25.85%
• 3Y*: 11.27%
• 5Y*: 3.79%
• 10Y*: 8.58%

FTSIX

• 1D: -0.16%
• 1M: -1.72%
• YTD: 6.94%
• 6M: 8.78%
• 1Y: 30.47%
• 3Y*: 11.94%
• 5Y*: 5.49%
• 10Y*: —

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

PARMX vs. FTSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
PARMX Parnassus Mid Cap Fund	-1.30%	12.86%	10.05%	12.66%	-21.41%	16.38%	14.88%	28.74%
FTSIX Fuller & Thaler Behavioral Small-Mid Core Equity Fund	6.94%	6.04%	11.86%	18.52%	-17.63%	25.29%	19.19%	26.72%

Correlation

The correlation between PARMX and FTSIX is 0.87, indicating a strong positive relationship between their price movements. Combining them offers limited diversification — they'll tend to fall together during downturns. For meaningful risk reduction, look for holdings with correlations below 0.5.

PARMX vs. FTSIX - Expense Ratio Comparison

PARMX has a 0.96% expense ratio, which is lower than FTSIX's 2.69% expense ratio.

FTSIX

Fuller & Thaler Behavioral Small-Mid Core Equity Fund

PARMX

Parnassus Mid Cap Fund

Return for Risk

PARMX vs. FTSIX — Risk / Return Rank

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

PARMX

PARMX Risk / Return Rank: 26
PARMX Sharpe Ratio Rank: 21
PARMX Sortino Ratio Rank: 24
PARMX Omega Ratio Rank: 20
PARMX Calmar Ratio Rank: 31
PARMX Martin Ratio Rank: 34

FTSIX

FTSIX Risk / Return Rank: 38
FTSIX Sharpe Ratio Rank: 34
FTSIX Sortino Ratio Rank: 38
FTSIX Omega Ratio Rank: 31
FTSIX Calmar Ratio Rank: 41
FTSIX Martin Ratio Rank: 45

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.

PARMX vs. FTSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Parnassus Mid Cap Fund (PARMX) and Fuller & Thaler Behavioral Small-Mid Core Equity Fund (FTSIX). 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.

	PARMX	FTSIX	Difference
Sharpe ratio Return per unit of total volatility	0.69	0.89	-0.20
Sortino ratio Return per unit of downside risk	1.11	1.39	-0.27
Omega ratio Gain probability vs. loss probability	1.15	1.18	-0.04
Calmar ratio Return relative to maximum drawdown	1.18	1.42	-0.24
Martin ratio Return relative to average drawdown	4.61	5.71	-1.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PARMX vs. FTSIX - Sharpe Ratio Comparison

The current PARMX Sharpe Ratio is 0.69, which is comparable to the FTSIX Sharpe Ratio of 0.89. The chart below compares the historical Sharpe Ratios of PARMX and FTSIX, 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

	PARMX	FTSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.69	0.89	-0.20
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.22	0.29	-0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.49	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.53	-0.08

Drawdowns

PARMX vs. FTSIX - Drawdown Comparison

The maximum PARMX drawdown since its inception was -49.88%, which is greater than FTSIX's maximum drawdown of -42.12%. Use the drawdown chart below to compare losses from any high point for PARMX and FTSIX.

Drawdown Indicators

	PARMX	FTSIX	Difference
Max Drawdown Largest peak-to-trough decline	-49.88%	-42.12%	-7.76%
Max Drawdown (1Y) Largest decline over 1 year	-10.49%	-6.80%	-3.69%
Max Drawdown (5Y) Largest decline over 5 years	-29.27%	-27.57%	-1.70%
Max Drawdown (10Y) Largest decline over 10 years	-37.39%	—	—
Current Drawdown Current decline from peak	-7.12%	-3.80%	-3.32%
Average Drawdown Average peak-to-trough decline	-6.94%	-7.80%	+0.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.14%	3.30%	-0.16%

Volatility

PARMX vs. FTSIX - Volatility Comparison

Parnassus Mid Cap Fund (PARMX) and Fuller & Thaler Behavioral Small-Mid Core Equity Fund (FTSIX) have volatilities of 5.59% and 5.71%, 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

	PARMX	FTSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.59%	5.71%	-0.12%
Volatility (6M) Calculated over the trailing 6-month period	11.06%	11.30%	-0.24%
Volatility (1Y) Calculated over the trailing 1-year period	19.40%	20.16%	-0.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.47%	19.12%	-1.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.63%	23.47%	-5.84%

Dividends

PARMX vs. FTSIX - Dividend Comparison

PARMX's dividend yield for the trailing twelve months is around 10.38%, more than FTSIX's 0.60% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PARMX Parnassus Mid Cap Fund	10.38%	10.25%	9.92%	2.29%	4.90%	4.88%	0.36%	4.15%	3.90%	4.19%	2.76%	6.42%
FTSIX Fuller & Thaler Behavioral Small-Mid Core Equity Fund	0.60%	0.64%	0.84%	0.85%	0.95%	5.50%	0.35%	2.16%	0.00%	0.00%	0.00%	0.00%