AACSX vs. SSFNX
AACSX (American Century One Choice Blend+ 2040 Portfolio) and SSFNX (State Street Target Retirement Fund) are both Target Retirement Date funds. Over the past 5 years, AACSX returned 6.49%/yr vs 4.12%/yr for SSFNX. Their correlation of 0.92 means they have usually moved in the same direction. AACSX charges 0.58%/yr vs 0.10%/yr for SSFNX.
Performance
AACSX vs. SSFNX - Performance Comparison
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Returns By Period
In the year-to-date period, AACSX achieves a 7.66% return, which is significantly higher than SSFNX's 5.13% return.
AACSX
- 1D
- 1.30%
- 1M
- -0.40%
- 6M
- 4.77%
- YTD
- 7.66%
- 1Y
- 16.52%
- 3Y*
- 13.07%
- 5Y*
- 6.49%
- 10Y*
- —
- ALL TIME*
- 7.25%
SSFNX
- 1D
- 0.59%
- 1M
- 0.00%
- 6M
- 3.48%
- YTD
- 5.13%
- 1Y
- 10.22%
- 3Y*
- 8.89%
- 5Y*
- 4.12%
- 10Y*
- 5.61%
- ALL TIME*
- 5.26%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
AACSX vs. SSFNX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | |
|---|---|---|---|---|---|---|
AACSX American Century One Choice Blend+ 2040 Portfolio | 7.66% | 16.83% | 11.52% | 14.77% | -16.20% | 8.09% |
SSFNX State Street Target Retirement Fund | 5.13% | 10.93% | 7.05% | 10.73% | -12.21% | 6.34% |
Correlation
The correlation between AACSX and SSFNX is 0.93, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.93 |
Correlation (3Y) Balances recent behavior with more history. | 0.92 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.92 |
Correlation (All Time) Calculated using the full available price history since Mar 10, 2021 | 0.92 |
The correlation between AACSX and SSFNX has been stable across timeframes, ranging from 0.92 to 0.93 - a consistent structural relationship.
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Return for Risk
AACSX vs. SSFNX — Risk / Return Rank
AACSX
SSFNX
AACSX vs. SSFNX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century One Choice Blend+ 2040 Portfolio (AACSX) and State Street Target Retirement Fund (SSFNX). 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.
| AACSX | SSFNX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.53 | ||
| Sortino ratioReturn per unit of downside risk | -0.75 | ||
| Omega ratioGain probability vs. loss probability | 1.28 | 1.41 | -0.13 |
| Calmar ratioReturn relative to maximum drawdown | 2.07 | 2.83 | -0.77 |
| Martin ratioReturn relative to average drawdown | 8.77 | 12.28 | -3.50 |
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Drawdowns
AACSX vs. SSFNX - Drawdown Comparison
The maximum AACSX drawdown since its inception was -24.20%, which is greater than SSFNX's maximum drawdown of -16.62%. Use the drawdown chart below to compare losses from any high point for AACSX and SSFNX.
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Drawdown Indicators
| AACSX | SSFNX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -24.20% | -16.62% | -7.58% |
Max Drawdown (1Y)Largest decline over 1 year | -7.38% | -3.52% | -3.86% |
Max Drawdown (3Y)Largest decline over 3 years | -12.29% | -5.21% | -7.08% |
Max Drawdown (5Y)Largest decline over 5 years | -24.20% | -16.62% | -7.58% |
Max Drawdown (10Y)Largest decline over 10 years | — | -16.62% | — |
Current DrawdownCurrent decline from peak | -1.03% | -0.42% | -0.61% |
Average DrawdownAverage peak-to-trough decline | -6.01% | -2.49% | -3.52% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.73% | 0.81% | +0.92% |
Volatility
AACSX vs. SSFNX - Volatility Comparison
American Century One Choice Blend+ 2040 Portfolio (AACSX) has a higher volatility of 2.65% compared to State Street Target Retirement Fund (SSFNX) at 1.23%. This indicates that AACSX's price experiences larger fluctuations and is considered to be riskier than SSFNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AACSX | SSFNX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.65% | 1.23% | +1.42% |
Volatility (6M)Calculated over the trailing 6-month period | 8.04% | 3.97% | +4.07% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.74% | 4.78% | +4.96% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 12.05% | 6.63% | +5.42% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 11.83% | 6.56% | +5.27% |
AACSX vs. SSFNX - Expense Ratio Comparison
AACSX has a 0.58% expense ratio, which is higher than SSFNX's 0.10% expense ratio.
Dividends
AACSX vs. SSFNX - Dividend Comparison
AACSX's dividend yield for the trailing twelve months is around 3.47%, less than SSFNX's 4.63% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AACSX American Century One Choice Blend+ 2040 Portfolio | 3.47% | 3.73% | 3.84% | 1.96% | 3.12% | 2.85% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
SSFNX State Street Target Retirement Fund | 4.63% | 4.86% | 5.78% | 5.26% | 5.12% | 6.69% | 1.61% | 3.35% | 4.40% | 2.72% | 1.84% | 2.05% |
Frequently Asked Questions
With a correlation of 0.93, AACSX and SSFNX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
AACSX has higher volatility (2.65%) compared to SSFNX (1.23%). In terms of maximum drawdown, AACSX dropped -24.20% vs SSFNX's -16.62%.
SSFNX currently has the higher Sharpe Ratio (2.09 vs 1.57), 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.
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