BRTNX vs. SSSYX

Last updated Jul 1, 2026

BRTNX (Bretton Fund) and SSSYX (State Street Equity 500 Index Fund Class K) are both mutual funds - BRTNX is a Large Cap Blend Equities fund managed by Bretton Fund, while SSSYX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, BRTNX returned 13.80%/yr vs 45.17%/yr for SSSYX. Their correlation of 0.86 suggests significant overlap in exposure. BRTNX charges 1.35%/yr vs 0.02%/yr for SSSYX.

Performance

BRTNX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Bretton Fund (BRTNX) and State Street Equity 500 Index Fund Class K (SSSYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BRTNX achieves a 0.71% return, which is significantly lower than SSSYX's 9.31% return. Over the past 10 years, BRTNX has underperformed SSSYX with an annualized return of 13.80%, while SSSYX has yielded a comparatively higher 45.17% annualized return.

BRTNX

• 1D: 0.35%
• 1M: 1.83%
• YTD: 0.71%
• 6M: 0.01%
• 1Y: 10.54%
• 3Y*: 15.25%
• 5Y*: 10.70%
• 10Y*: 13.80%

SSSYX

• 1D: 1.18%
• 1M: -1.74%
• YTD: 9.31%
• 6M: 8.51%
• 1Y: 21.30%
• 3Y*: 20.25%
• 5Y*: 13.17%
• 10Y*: 45.17%

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

BRTNX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BRTNX Bretton Fund	0.71%	11.57%	20.27%	28.91%	-12.57%	27.75%	8.44%	35.39%	-1.95%	18.19%
SSSYX State Street Equity 500 Index Fund Class K	9.31%	17.81%	24.99%	26.27%	-18.16%	28.51%	1,083.11%	31.38%	-4.38%	21.61%

Correlation

The correlation between BRTNX and SSSYX is 0.65, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Sep 18, 2014	0.86

Over the past year, the correlation between BRTNX and SSSYX has dropped to 0.65 - well below their long-term average of 0.86, suggesting their price drivers have been diverging.

Return for Risk

BRTNX vs. SSSYX — Risk / Return Rank

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

BRTNX

BRTNX Risk / Return Rank: 14
BRTNX Sharpe Ratio Rank: 16
BRTNX Sortino Ratio Rank: 17
BRTNX Omega Ratio Rank: 15
BRTNX Calmar Ratio Rank: 11
BRTNX Martin Ratio Rank: 11

SSSYX

SSSYX Risk / Return Rank: 60
SSSYX Sharpe Ratio Rank: 57
SSSYX Sortino Ratio Rank: 53
SSSYX Omega Ratio Rank: 55
SSSYX Calmar Ratio Rank: 61
SSSYX 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.

BRTNX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Bretton Fund (BRTNX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	BRTNX	SSSYX	Difference
Sharpe ratio: Return per unit of total volatility	0.90	1.76	-0.86
Sortino ratio: Return per unit of downside risk	1.39	2.42	-1.03
Omega ratio: Gain probability vs. loss probability	1.16	1.32	-0.16
Calmar ratio: Return relative to maximum drawdown	0.78	2.48	-1.70
Martin ratio: Return relative to average drawdown	2.48	10.94	-8.46

BRTNX vs. SSSYX - Sharpe Ratio Comparison

The current BRTNX Sharpe Ratio is 0.90, which is lower than the SSSYX Sharpe Ratio of 1.76. The chart below compares the historical Sharpe Ratios of BRTNX and SSSYX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BRTNX vs. SSSYX - Drawdown Comparison

The maximum BRTNX drawdown since its inception was -93.26%, which is greater than SSSYX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for BRTNX and SSSYX.

Drawdown Indicators

	BRTNX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-93.26%	-33.77%	-59.49%
Max Drawdown (1Y) Largest decline over 1 year	-14.53%	-8.88%	-5.65%
Max Drawdown (3Y) Largest decline over 3 years	-93.26%	-18.74%	-74.52%
Max Drawdown (5Y) Largest decline over 5 years	-93.26%	-24.49%	-68.77%
Max Drawdown (10Y) Largest decline over 10 years	-93.26%	-33.77%	-59.49%
Current Drawdown Current decline from peak	-91.66%	-2.14%	-89.52%
Average Drawdown Average peak-to-trough decline	-12.23%	-3.91%	-8.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.57%	2.01%	+2.56%

Volatility

BRTNX vs. SSSYX - Volatility Comparison

The current volatility for Bretton Fund (BRTNX) is 4.06%, while State Street Equity 500 Index Fund Class K (SSSYX) has a volatility of 4.94%. This indicates that BRTNX experiences smaller price fluctuations and is considered to be less risky than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BRTNX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.06%	4.94%	-0.88%
Volatility (6M) Calculated over the trailing 6-month period	9.61%	9.92%	-0.31%
Volatility (1Y) Calculated over the trailing 1-year period	12.64%	12.53%	+0.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	457.37%	16.99%	+440.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	323.58%	121.18%	+202.40%

BRTNX vs. SSSYX - Expense Ratio Comparison

BRTNX has a 1.35% expense ratio, which is higher than SSSYX's 0.02% expense ratio.

Dividends

BRTNX vs. SSSYX - Dividend Comparison

BRTNX's dividend yield for the trailing twelve months is around 1.51%, more than SSSYX's 1.32% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BRTNX Bretton Fund	1.51%	1.52%	1.09%	0.00%	1.98%	0.62%	0.29%	0.00%	0.86%	0.00%	1.63%	0.19%
SSSYX State Street Equity 500 Index Fund Class K	1.32%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%

Frequently Asked Questions

Can I hold both BRTNX and SSSYX in my portfolio?

BRTNX and SSSYX have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BRTNX or SSSYX?

SSSYX has higher volatility (4.94%) compared to BRTNX (4.06%). In terms of maximum drawdown, BRTNX dropped -93.26% vs SSSYX's -33.77%.

Which has better risk-adjusted returns?

SSSYX currently has the higher Sharpe Ratio (1.76 vs 0.90), 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.