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ISIN
US0249327745
CUSIP
24932774
Inception Date
May 31, 2005
Region
North America (U.S.)
Min. Investment
$2,500
Distribution Policy
Distributing
Asset Class
Bond
Assets Under Management
$1B

Share Price Chart


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Performance

APOIX Performance Chart

American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX) is up 1.2% since the beginning of the year. APOIX is currently trading at $10 per share. Investors who bought $1,000 worth of APOIX shares 5 years ago would now be looking at an investment worth $1,150.


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S&P 500 Index

Returns By Period

American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX) has returned 1.19% so far this year and 3.16% over the past 12 months. Over the last ten years, APOIX has returned 3.01% per year, falling short of the S&P 500 Index benchmark, which averaged 13.71% annually.


American Century Short Duration Inflation Protection Bond Fund Investor Class

1D
-0.19%
1M
-0.35%
YTD
1.19%
6M
1.28%
1Y
3.16%
3Y*
4.62%
5Y*
2.84%
10Y*
3.01%

Benchmark (S&P 500 Index)

1D
-1.44%
1M
-1.45%
YTD
7.60%
6M
6.59%
1Y
22.24%
3Y*
19.20%
5Y*
11.54%
10Y*
13.71%
*Multi-year figures are annualized to reflect compound growth (CAGR)

APOIX Monthly Returns History

Based on dividend-adjusted daily data since May 31, 2005, APOIX's average daily return is +0.01%, while the average monthly return is +0.26%. At this rate, an investment would double in approximately 22.2 years.

Historically, 59% of months were positive and 41% were negative. The best month was Dec 2008 with a return of +5.6%, while the worst month was Oct 2008 at -7.5%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 5 months.

On a daily basis, APOIX closed higher 39% of trading days. The best single day was Mar 18, 2009 with a return of +3.6%, while the worst single day was Oct 8, 2008 at -2.3%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.58%0.38%-0.10%1.05%0.09%-0.82%1.19%
20250.98%1.36%0.96%0.76%-0.47%0.64%0.19%1.42%-0.09%-0.09%0.28%-0.12%5.95%
20240.40%-0.40%0.60%-0.40%1.10%0.63%0.98%0.58%1.06%-0.67%0.48%-0.28%4.15%
20230.91%-0.50%2.11%0.10%-1.08%-0.58%0.40%0.00%-0.40%0.20%1.30%1.35%3.82%
2022-0.73%1.30%-0.55%-0.28%0.18%-1.91%2.07%-1.66%-3.47%0.97%0.58%-0.34%-3.89%
20210.66%0.00%0.65%1.11%0.82%-0.05%1.55%0.09%-0.00%0.81%0.18%0.31%6.30%

Benchmark Metrics

American Century Short Duration Inflation Protection Bond Fund Investor Class has an annualized alpha of 3.34%, beta of -0.02, and R2 of 0.01 versus S&P 500 Index. Calculated based on daily prices since May 31, 2005.

  • This fund captured 9.96% of S&P 500 Index gains and tended to rise during its downturns (downside capture of -0.43%) - a profile typical of hedging or uncorrelated assets.
  • Beta of -0.02 may look defensive, but with R2 of 0.01 this fund is largely uncorrelated with S&P 500 Index - low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
  • R2 of 0.01 means this fund moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

Alpha
3.34%
Beta
-0.02
0.01
Upside Capture
9.96%
Downside Capture
-0.43%

Expense Ratio

APOIX has an expense ratio of 0.57%, placing it in the medium range.


Return for Risk

Risk / Return Rank

APOIX ranks 61 for risk / return — better than 61% of mutual funds on our site. You're getting solid returns for the risk taken. A good sign, especially for investors who want growth without excessive volatility.


APOIX Risk / Return Rank: 6161
Overall Rank
APOIX Sharpe Ratio Rank: 4343
Sharpe Ratio Rank
APOIX Sortino Ratio Rank: 4949
Sortino Ratio Rank
APOIX Omega Ratio Rank: 5050
Omega Ratio Rank
APOIX Calmar Ratio Rank: 8787
Calmar Ratio Rank
APOIX Martin Ratio Rank: 7777
Martin Ratio Rank
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.

Return / Risk — by metrics

The table below present risk-adjusted performance metrics for American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX) and compare them to S&P 500 Index.

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.


APOIXBenchmarkDifference
Sharpe ratioReturn per unit of total volatility

-0.01

Sortino ratioReturn per unit of downside risk

+0.28

Omega ratioGain probability vs. loss probability

1.36

1.32

+0.03

Calmar ratioReturn relative to maximum drawdown

3.98

2.46

+1.52

Martin ratioReturn relative to average drawdown

13.40

10.92

+2.48

Dividends

Dividend History

American Century Short Duration Inflation Protection Bond Fund Investor Class provided a 4.67% dividend yield over the last twelve months, with an annual payout of $0.49 per share.


0.00%1.00%2.00%3.00%4.00%5.00%6.00%$0.00$0.10$0.20$0.30$0.40$0.50$0.602016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM2025202420232022202120202019201820172016
Dividend$0.49$0.41$0.24$0.28$0.56$0.43$0.09$0.17$0.40$0.15$0.04

Dividend yield

4.67%3.99%2.31%2.78%5.63%3.92%0.81%1.69%3.99%1.52%0.42%

Monthly Dividends

The table displays the monthly dividend distributions for American Century Short Duration Inflation Protection Bond Fund Investor Class. The dividends shown in the table have been adjusted to account for any splits that may have occurred.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2026$0.00$0.00$0.00$0.00$0.00$0.07$0.07
2025$0.00$0.00$0.00$0.00$0.00$0.12$0.00$0.00$0.00$0.00$0.00$0.30$0.41
2024$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.23$0.24
2023$0.00$0.00$0.00$0.00$0.00$0.03$0.00$0.00$0.00$0.00$0.00$0.25$0.28
2022$0.00$0.00$0.00$0.00$0.00$0.04$0.00$0.00$0.00$0.00$0.00$0.52$0.56
2021$0.00$0.00$0.00$0.00$0.00$0.03$0.00$0.00$0.00$0.00$0.00$0.39$0.43

Drawdowns

Drawdowns Chart

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.


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Worst Drawdowns

The table below displays the maximum drawdowns of the American Century Short Duration Inflation Protection Bond Fund Investor Class. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the American Century Short Duration Inflation Protection Bond Fund Investor Class was 14.54%, occurring on Nov 24, 2008. Recovery took 211 trading sessions.

The current American Century Short Duration Inflation Protection Bond Fund Investor Class drawdown is 0.82%.


Related event

Drawdown

Fall

Recovery

Underwater

Financial crisis2007–2009
-14.54%Nov 2008
8mo 18d10mo 8d
1y 6moMar 2008 - Sep 2009
2006 pullback2006
-7.78%Jun 2006
1y 26d1y 2mo
2y 3moJun 2005 - Sep 2007
Bear market2022
-6.58%Sep 2022
6mo 20d1y 9mo
2y 3moMar 2022 - Jun 2024
2011 pullback2011
-5.61%Feb 2011
3mo 7d2mo 8d
5mo 15dNov 2010 - Apr 2011
COVID crash2020
-5.60%Mar 2020
13d3mo 6d
3mo 19dMar 2020 - Jun 2020

Drawdown Indicators


APOIXBenchmarkDifference

Max Drawdown

Largest peak-to-trough decline

-14.54%

-56.78%

+42.24%

Max Drawdown (1Y)

Largest decline over 1 year

-0.82%

-9.10%

+8.28%

Max Drawdown (3Y)

Largest decline over 3 years

-1.42%

-18.90%

+17.48%

Max Drawdown (5Y)

Largest decline over 5 years

-6.58%

-25.43%

+18.85%

Max Drawdown (10Y)

Largest decline over 10 years

-6.58%

-33.92%

+27.34%

Current Drawdown

Current decline from peak

-0.82%

-3.21%

+2.39%

Average Drawdown

Average peak-to-trough decline

-1.99%

-10.71%

+8.72%

Ulcer Index

Depth and duration of drawdowns from previous peaks

0.24%

2.04%

-1.80%

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


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Portfolio Analyzer

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