STWTX vs. SSAFX

Last updated Jun 23, 2026

STWTX (Hartford Schroders Tax-Aware Bond Fund) and SSAFX (State Street Aggregate Bond Index Portfolio) are both Intermediate Core Bond funds. Over the past 10 years, STWTX returned 1.77%/yr vs 27.82%/yr for SSAFX. A 0.64 correlation means they provide meaningful diversification when combined. STWTX charges 0.49%/yr vs 0.02%/yr for SSAFX.

Performance

STWTX vs. SSAFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Hartford Schroders Tax-Aware Bond Fund (STWTX) and State Street Aggregate Bond Index Portfolio (SSAFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, STWTX achieves a 1.28% return, which is significantly higher than SSAFX's 0.62% return. Over the past 10 years, STWTX has underperformed SSAFX with an annualized return of 1.77%, while SSAFX has yielded a comparatively higher 27.82% annualized return.

STWTX

• 1D: 0.10%
• 1M: 1.61%
• YTD: 1.28%
• 6M: 1.43%
• 1Y: 6.70%
• 3Y*: 2.54%
• 5Y*: 0.32%
• 10Y*: 1.77%

SSAFX

• 1D: 0.27%
• 1M: 0.90%
• YTD: 0.62%
• 6M: 0.77%
• 1Y: 4.76%
• 3Y*: 3.94%
• 5Y*: -0.06%
• 10Y*: 27.82%

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

STWTX vs. SSAFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
STWTX Hartford Schroders Tax-Aware Bond Fund	1.28%	1.67%	1.33%	6.86%	-8.46%	0.01%	6.01%	7.59%	0.34%	4.13%
SSAFX State Street Aggregate Bond Index Portfolio	0.62%	6.81%	1.34%	5.61%	-13.30%	-1.72%	978.57%	8.69%	-0.12%	3.38%

Correlation

The correlation between STWTX and SSAFX is 0.66, 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	0.66
Correlation (3Y) Calculated over the trailing 3-year period	0.71
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (10Y) Calculated over the trailing 10-year period	0.65
Correlation (All Time) Calculated using the full available price history since Sep 22, 2014	0.64

The correlation between STWTX and SSAFX has been stable across timeframes, ranging from 0.64 to 0.71 - a consistent structural relationship.

Return for Risk

STWTX vs. SSAFX — Risk / Return Rank

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

STWTX

STWTX Risk / Return Rank: 53
STWTX Sharpe Ratio Rank: 60
STWTX Sortino Ratio Rank: 68
STWTX Omega Ratio Rank: 78
STWTX Calmar Ratio Rank: 32
STWTX Martin Ratio Rank: 28

SSAFX

SSAFX Risk / Return Rank: 24
SSAFX Sharpe Ratio Rank: 24
SSAFX Sortino Ratio Rank: 26
SSAFX Omega Ratio Rank: 23
SSAFX Calmar Ratio Rank: 25
SSAFX Martin Ratio Rank: 22

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.

STWTX vs. SSAFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Hartford Schroders Tax-Aware Bond Fund (STWTX) and State Street Aggregate Bond Index Portfolio (SSAFX). 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.

	STWTX	SSAFX	Difference
Sharpe ratio: Return per unit of total volatility	2.09	1.32	+0.77
Sortino ratio: Return per unit of downside risk	3.12	1.97	+1.14
Omega ratio: Gain probability vs. loss probability	1.46	1.23	+0.23
Calmar ratio: Return relative to maximum drawdown	2.01	1.76	+0.25
Martin ratio: Return relative to average drawdown	6.08	5.07	+1.00

STWTX vs. SSAFX - Sharpe Ratio Comparison

The current STWTX Sharpe Ratio is 2.09, which is higher than the SSAFX Sharpe Ratio of 1.32. The chart below compares the historical Sharpe Ratios of STWTX and SSAFX, 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

STWTX vs. SSAFX - Drawdown Comparison

The maximum STWTX drawdown since its inception was -14.44%, smaller than the maximum SSAFX drawdown of -18.74%. Use the drawdown chart below to compare losses from any high point for STWTX and SSAFX.

Drawdown Indicators

	STWTX	SSAFX	Difference
Max Drawdown Largest peak-to-trough decline	-14.44%	-18.74%	+4.30%
Max Drawdown (1Y) Largest decline over 1 year	-3.34%	-2.74%	-0.60%
Max Drawdown (3Y) Largest decline over 3 years	-8.66%	-6.09%	-2.57%
Max Drawdown (5Y) Largest decline over 5 years	-14.44%	-18.10%	+3.66%
Max Drawdown (10Y) Largest decline over 10 years	-14.44%	-18.74%	+4.30%
Current Drawdown Current decline from peak	-0.98%	-2.42%	+1.44%
Average Drawdown Average peak-to-trough decline	-2.60%	-4.40%	+1.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.10%	0.95%	+0.15%

Volatility

STWTX vs. SSAFX - Volatility Comparison

The current volatility for Hartford Schroders Tax-Aware Bond Fund (STWTX) is 0.73%, while State Street Aggregate Bond Index Portfolio (SSAFX) has a volatility of 1.14%. This indicates that STWTX experiences smaller price fluctuations and is considered to be less risky than SSAFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STWTX	SSAFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.73%	1.14%	-0.41%
Volatility (6M) Calculated over the trailing 6-month period	2.30%	2.72%	-0.42%
Volatility (1Y) Calculated over the trailing 1-year period	3.22%	3.67%	-0.45%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.96%	5.95%	-0.99%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.93%	277.40%	-273.47%

STWTX vs. SSAFX - Expense Ratio Comparison

STWTX has a 0.49% expense ratio, which is higher than SSAFX's 0.02% expense ratio.

Dividends

STWTX vs. SSAFX - Dividend Comparison

STWTX's dividend yield for the trailing twelve months is around 3.41%, less than SSAFX's 4.15% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSAFX State Street Aggregate Bond Index Portfolio	4.15%	3.70%	3.76%	3.16%	2.49%	1.90%	2.41%	2.88%	2.82%	2.42%	2.21%	3.21%
STWTX Hartford Schroders Tax-Aware Bond Fund	3.41%	2.90%	3.20%	3.01%	2.20%	2.61%	2.90%	4.34%	3.47%	2.03%	2.85%	2.91%

Frequently Asked Questions

Can I hold both STWTX and SSAFX in my portfolio?

STWTX and SSAFX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, STWTX or SSAFX?

SSAFX has higher volatility (1.14%) compared to STWTX (0.73%). In terms of maximum drawdown, STWTX dropped -14.44% vs SSAFX's -18.74%.

Which has better risk-adjusted returns?

STWTX currently has the higher Sharpe Ratio (2.09 vs 1.32), 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.