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NOSIX vs. PRBLX
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Correlation

The correlation between NOSIX and PRBLX is 0.92, 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.


-0.50.00.51.00.9

Performance

NOSIX vs. PRBLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Northern Stock Index Fund (NOSIX) and Parnassus Core Equity Fund (PRBLX). The values are adjusted to include any dividend payments, if applicable.

-5.00%0.00%5.00%10.00%AugustSeptemberOctoberNovemberDecember2025
5.75%
-4.77%
NOSIX
PRBLX

Key characteristics

Sharpe Ratio

NOSIX:

1.88

PRBLX:

0.63

Sortino Ratio

NOSIX:

2.53

PRBLX:

0.85

Omega Ratio

NOSIX:

1.34

PRBLX:

1.14

Calmar Ratio

NOSIX:

2.89

PRBLX:

0.55

Martin Ratio

NOSIX:

11.30

PRBLX:

2.29

Ulcer Index

NOSIX:

2.16%

PRBLX:

4.09%

Daily Std Dev

NOSIX:

12.95%

PRBLX:

14.95%

Max Drawdown

NOSIX:

-55.42%

PRBLX:

-45.76%

Current Drawdown

NOSIX:

-3.46%

PRBLX:

-11.77%

Returns By Period

In the year-to-date period, NOSIX achieves a 1.21% return, which is significantly higher than PRBLX's 0.94% return. Over the past 10 years, NOSIX has outperformed PRBLX with an annualized return of 11.23%, while PRBLX has yielded a comparatively lower 5.08% annualized return.


NOSIX

YTD

1.21%

1M

-3.23%

6M

5.75%

1Y

24.84%

5Y*

11.29%

10Y*

11.23%

PRBLX

YTD

0.94%

1M

-2.69%

6M

-4.77%

1Y

9.58%

5Y*

5.03%

10Y*

5.08%

*Annualized

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.


NOSIX vs. PRBLX - Expense Ratio Comparison

NOSIX has a 0.05% expense ratio, which is lower than PRBLX's 0.82% expense ratio.


PRBLX
Parnassus Core Equity Fund
Expense ratio chart for PRBLX: current value at 0.82% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.82%
Expense ratio chart for NOSIX: current value at 0.05% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.05%

Risk-Adjusted Performance

NOSIX vs. PRBLX — Risk-Adjusted Performance Rank

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

NOSIX
The Risk-Adjusted Performance Rank of NOSIX is 9090
Overall Rank
The Sharpe Ratio Rank of NOSIX is 8989
Sharpe Ratio Rank
The Sortino Ratio Rank of NOSIX is 8888
Sortino Ratio Rank
The Omega Ratio Rank of NOSIX is 8888
Omega Ratio Rank
The Calmar Ratio Rank of NOSIX is 9292
Calmar Ratio Rank
The Martin Ratio Rank of NOSIX is 9191
Martin Ratio Rank

PRBLX
The Risk-Adjusted Performance Rank of PRBLX is 4444
Overall Rank
The Sharpe Ratio Rank of PRBLX is 4242
Sharpe Ratio Rank
The Sortino Ratio Rank of PRBLX is 3939
Sortino Ratio Rank
The Omega Ratio Rank of PRBLX is 4545
Omega Ratio Rank
The Calmar Ratio Rank of PRBLX is 5353
Calmar Ratio Rank
The Martin Ratio Rank of PRBLX is 4242
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

NOSIX vs. PRBLX - Risk-Adjusted Performance Comparison

This table presents a comparison of risk-adjusted performance metrics for Northern Stock Index Fund (NOSIX) and Parnassus Core Equity Fund (PRBLX). 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.


Sharpe ratio
The chart of Sharpe ratio for NOSIX, currently valued at 1.88, compared to the broader market-1.000.001.002.003.004.001.880.63
The chart of Sortino ratio for NOSIX, currently valued at 2.53, compared to the broader market0.002.004.006.008.0010.002.530.85
The chart of Omega ratio for NOSIX, currently valued at 1.34, compared to the broader market1.002.003.004.001.341.14
The chart of Calmar ratio for NOSIX, currently valued at 2.89, compared to the broader market0.005.0010.0015.002.890.55
The chart of Martin ratio for NOSIX, currently valued at 11.30, compared to the broader market0.0020.0040.0060.0080.0011.302.29
NOSIX
PRBLX

The current NOSIX Sharpe Ratio is 1.88, which is higher than the PRBLX Sharpe Ratio of 0.63. The chart below compares the historical Sharpe Ratios of NOSIX and PRBLX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.


Rolling 12-month Sharpe Ratio0.501.001.502.002.503.00AugustSeptemberOctoberNovemberDecember2025
1.88
0.63
NOSIX
PRBLX

Dividends

NOSIX vs. PRBLX - Dividend Comparison

NOSIX's dividend yield for the trailing twelve months is around 1.25%, more than PRBLX's 0.26% yield.


TTM20242023202220212020201920182017201620152014
NOSIX
Northern Stock Index Fund
1.25%1.27%1.56%1.68%1.15%1.53%1.70%2.09%1.73%2.06%1.99%1.77%
PRBLX
Parnassus Core Equity Fund
0.26%0.26%0.57%0.49%0.83%0.57%0.73%1.14%1.30%1.02%2.17%1.46%

Drawdowns

NOSIX vs. PRBLX - Drawdown Comparison

The maximum NOSIX drawdown since its inception was -55.42%, which is greater than PRBLX's maximum drawdown of -45.76%. Use the drawdown chart below to compare losses from any high point for NOSIX and PRBLX. For additional features, visit the drawdowns tool.


-14.00%-12.00%-10.00%-8.00%-6.00%-4.00%-2.00%0.00%AugustSeptemberOctoberNovemberDecember2025
-3.46%
-11.77%
NOSIX
PRBLX

Volatility

NOSIX vs. PRBLX - Volatility Comparison

Northern Stock Index Fund (NOSIX) has a higher volatility of 5.14% compared to Parnassus Core Equity Fund (PRBLX) at 4.57%. This indicates that NOSIX's price experiences larger fluctuations and is considered to be riskier than PRBLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.


2.00%4.00%6.00%8.00%10.00%AugustSeptemberOctoberNovemberDecember2025
5.14%
4.57%
NOSIX
PRBLX
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Disclaimer

The information contained herein does not constitute investment advice and made available for educational purposes only. Prices and returns on equities are listed without consideration of fees, commissions, taxes, penalties, or interest payable due to purchasing, holding, or selling.

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