ACITX vs. SPY
Compare and contrast key facts about American Century Inflation-Adjusted Bond Fund (ACITX) and State Street SPDR S&P 500 ETF (SPY).
ACITX is managed by American Century. It was launched on Feb 9, 1997. SPY is a passively managed fund by State Street that tracks the performance of the S&P 500 Index. It was launched on Jan 22, 1993.
Performance
ACITX vs. SPY - Performance Comparison
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ACITX vs. SPY - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ACITX American Century Inflation-Adjusted Bond Fund | 0.28% | 6.68% | 1.68% | 3.17% | -12.37% | 6.38% | 10.28% | 7.85% | -1.21% | 4.47% |
SPY State Street SPDR S&P 500 ETF | -4.37% | 17.72% | 24.89% | 26.18% | -18.18% | 28.73% | 18.33% | 31.22% | -4.57% | 21.71% |
Returns By Period
In the year-to-date period, ACITX achieves a 0.28% return, which is significantly higher than SPY's -4.37% return. Over the past 10 years, ACITX has underperformed SPY with an annualized return of 2.56%, while SPY has yielded a comparatively higher 13.98% annualized return.
ACITX
- 1D
- 0.66%
- 1M
- -1.40%
- YTD
- 0.28%
- 6M
- 0.10%
- 1Y
- 2.71%
- 3Y*
- 2.70%
- 5Y*
- 1.16%
- 10Y*
- 2.56%
SPY
- 1D
- 2.91%
- 1M
- -4.94%
- YTD
- -4.37%
- 6M
- -1.82%
- 1Y
- 17.59%
- 3Y*
- 18.19%
- 5Y*
- 11.69%
- 10Y*
- 13.98%
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ACITX vs. SPY - Expense Ratio Comparison
ACITX has a 0.46% expense ratio, which is higher than SPY's 0.09% expense ratio.
Return for Risk
ACITX vs. SPY — Risk / Return Rank
ACITX
SPY
ACITX vs. SPY - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Inflation-Adjusted Bond Fund (ACITX) and State Street SPDR S&P 500 ETF (SPY). 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.
| ACITX | SPY | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.76 | 0.93 | -0.17 |
Sortino ratioReturn per unit of downside risk | 1.07 | 1.45 | -0.39 |
Omega ratioGain probability vs. loss probability | 1.14 | 1.22 | -0.08 |
Calmar ratioReturn relative to maximum drawdown | 1.21 | 1.53 | -0.32 |
Martin ratioReturn relative to average drawdown | 3.87 | 7.30 | -3.43 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| ACITX | SPY | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.76 | 0.93 | -0.17 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.19 | 0.69 | -0.50 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.47 | 0.78 | -0.32 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.75 | 0.56 | +0.19 |
Correlation
The correlation between ACITX and SPY is -0.11. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.
Dividends
ACITX vs. SPY - Dividend Comparison
ACITX's dividend yield for the trailing twelve months is around 4.29%, more than SPY's 1.14% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ACITX American Century Inflation-Adjusted Bond Fund | 4.29% | 4.30% | 2.19% | 4.44% | 7.34% | 4.47% | 1.16% | 2.45% | 4.31% | 3.47% | 2.27% | 0.99% |
SPY State Street SPDR S&P 500 ETF | 1.14% | 1.07% | 1.21% | 1.40% | 1.65% | 1.20% | 1.52% | 1.75% | 2.04% | 1.80% | 2.03% | 2.06% |
Drawdowns
ACITX vs. SPY - Drawdown Comparison
The maximum ACITX drawdown since its inception was -15.50%, smaller than the maximum SPY drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for ACITX and SPY.
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Drawdown Indicators
| ACITX | SPY | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -15.50% | -55.19% | +39.69% |
Max Drawdown (1Y)Largest decline over 1 year | -3.05% | -12.05% | +9.00% |
Max Drawdown (5Y)Largest decline over 5 years | -15.50% | -24.50% | +9.00% |
Max Drawdown (10Y)Largest decline over 10 years | -15.50% | -33.72% | +18.22% |
Current DrawdownCurrent decline from peak | -2.27% | -6.24% | +3.97% |
Average DrawdownAverage peak-to-trough decline | -3.25% | -9.09% | +5.84% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.95% | 2.52% | -1.57% |
Volatility
ACITX vs. SPY - Volatility Comparison
The current volatility for American Century Inflation-Adjusted Bond Fund (ACITX) is 1.39%, while State Street SPDR S&P 500 ETF (SPY) has a volatility of 5.31%. This indicates that ACITX experiences smaller price fluctuations and is considered to be less risky than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ACITX | SPY | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.39% | 5.31% | -3.92% |
Volatility (6M)Calculated over the trailing 6-month period | 2.22% | 9.47% | -7.25% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.08% | 19.05% | -14.97% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.15% | 17.06% | -10.91% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.52% | 17.92% | -12.40% |