ACITX vs. APOIX
ACITX (American Century Inflation-Adjusted Bond Fund) and APOIX (American Century Short Duration Inflation Protection Bond Fund Investor Class) are both Inflation-Protected Bonds funds from American Century. Over the past 10 years, ACITX returned 2.39%/yr vs 3.05%/yr for APOIX. Their correlation of 0.83 means they have usually moved in the same direction. ACITX charges 0.46%/yr vs 0.57%/yr for APOIX.
Performance
ACITX vs. APOIX - Performance Comparison
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Returns By Period
In the year-to-date period, ACITX achieves a 0.56% return, which is significantly lower than APOIX's 1.67% return. Over the past 10 years, ACITX has underperformed APOIX with an annualized return of 2.39%, while APOIX has yielded a comparatively higher 3.05% annualized return.
ACITX
- 1D
- -0.10%
- 1M
- -0.57%
- 6M
- 0.09%
- YTD
- 0.56%
- 1Y
- 1.79%
- 3Y*
- 3.45%
- 5Y*
- 0.04%
- 10Y*
- 2.39%
- ALL TIME*
- 4.24%
APOIX
- 1D
- 0.00%
- 1M
- 0.19%
- 6M
- 1.09%
- YTD
- 1.67%
- 1Y
- 2.60%
- 3Y*
- 4.76%
- 5Y*
- 2.57%
- 10Y*
- 3.05%
- ALL TIME*
- 3.04%
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 |
ACITX vs. APOIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ACITX American Century Inflation-Adjusted Bond Fund | 0.56% | 6.68% | 1.68% | 3.17% | -12.37% | 6.38% | 10.28% | 7.85% | -1.21% | 4.47% |
APOIX American Century Short Duration Inflation Protection Bond Fund Investor Class | 1.67% | 5.95% | 4.15% | 3.82% | -3.89% | 6.30% | 5.06% | 4.77% | 1.81% | 0.73% |
Correlation
The correlation between ACITX and APOIX is 0.72, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.72 |
Correlation (3Y) Balances recent behavior with more history. | 0.81 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.83 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.79 |
Correlation (All Time) Calculated using the full available price history since May 31, 2005 | 0.83 |
The correlation between ACITX and APOIX shifts across timeframes, from 0.72 (1 year) to 0.83 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
ACITX vs. APOIX — Risk / Return Rank
ACITX
APOIX
ACITX vs. APOIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Inflation-Adjusted Bond Fund (ACITX) and American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX). 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.
| ACITX | APOIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.97 | ||
| Sortino ratioReturn per unit of downside risk | -1.51 | ||
| Omega ratioGain probability vs. loss probability | 1.12 | 1.34 | -0.21 |
| Calmar ratioReturn relative to maximum drawdown | 1.11 | 3.66 | -2.54 |
| Martin ratioReturn relative to average drawdown | 3.19 | 10.52 | -7.33 |
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Drawdowns
ACITX vs. APOIX - Drawdown Comparison
The maximum ACITX drawdown since its inception was -15.50%, which is greater than APOIX's maximum drawdown of -14.54%. Use the drawdown chart below to compare losses from any high point for ACITX and APOIX.
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Drawdown Indicators
| ACITX | APOIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -15.50% | -14.54% | -0.96% |
Max Drawdown (1Y)Largest decline over 1 year | -2.05% | -0.82% | -1.23% |
Max Drawdown (3Y)Largest decline over 3 years | -4.18% | -1.42% | -2.76% |
Max Drawdown (5Y)Largest decline over 5 years | -15.50% | -6.58% | -8.92% |
Max Drawdown (10Y)Largest decline over 10 years | -15.50% | -6.58% | -8.92% |
Current DrawdownCurrent decline from peak | -1.99% | -0.35% | -1.64% |
Average DrawdownAverage peak-to-trough decline | -3.23% | -1.98% | -1.25% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.71% | 0.28% | +0.43% |
Volatility
ACITX vs. APOIX - Volatility Comparison
American Century Inflation-Adjusted Bond Fund (ACITX) has a higher volatility of 0.77% compared to American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX) at 0.41%. This indicates that ACITX's price experiences larger fluctuations and is considered to be riskier than APOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ACITX | APOIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.77% | 0.41% | +0.36% |
Volatility (6M)Calculated over the trailing 6-month period | 2.39% | 1.36% | +1.03% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.24% | 1.80% | +1.44% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.13% | 3.30% | +2.83% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.49% | 2.85% | +2.64% |
ACITX vs. APOIX - Expense Ratio Comparison
ACITX has a 0.46% expense ratio, which is lower than APOIX's 0.57% expense ratio.
Dividends
ACITX vs. APOIX - Dividend Comparison
ACITX's dividend yield for the trailing twelve months is around 3.93%, more than APOIX's 3.53% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ACITX American Century Inflation-Adjusted Bond Fund | 3.93% | 4.30% | 2.19% | 4.44% | 7.34% | 4.47% | 1.16% | 2.45% | 4.31% | 3.47% | 2.27% | 0.99% |
APOIX American Century Short Duration Inflation Protection Bond Fund Investor Class | 3.53% | 3.99% | 2.31% | 2.78% | 5.63% | 3.92% | 0.81% | 1.69% | 3.99% | 1.52% | 0.42% | 0.00% |
Frequently Asked Questions
ACITX and APOIX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ACITX has higher volatility (0.77%) compared to APOIX (0.41%). In terms of maximum drawdown, ACITX dropped -15.50% vs APOIX's -14.54%.
APOIX currently has the higher Sharpe Ratio (1.67 vs 0.71), 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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