FFNYX vs. APOIX

Last updated Jun 4, 2026

FFNYX (Fidelity SAI 0-5 Year Inflation-Protected Bond Index Fund) and APOIX (American Century Short Duration Inflation Protection Bond Fund Investor Class) are both Inflation-Protected Bonds funds. Their correlation of 0.88 suggests significant overlap in exposure. FFNYX charges 0.05%/yr vs 0.57%/yr for APOIX.

Performance

FFNYX vs. APOIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI 0-5 Year Inflation-Protected Bond Index Fund (FFNYX) and American Century Short Duration Inflation Protection Bond Fund Investor Class (APOIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

FFNYX

• 1D: 0.00%
• 1M: -0.00%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

APOIX

• 1D: 0.00%
• 1M: -0.00%
• YTD: 2.02%
• 6M: 1.90%
• 1Y: 4.51%
• 3Y*: 4.85%
• 5Y*: 2.96%
• 10Y*: 3.13%

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

FFNYX vs. APOIX - Yearly Performance Comparison

	2026 (YTD)
FFNYX Fidelity SAI 0-5 Year Inflation-Protected Bond Index Fund	0.93%
APOIX American Century Short Duration Inflation Protection Bond Fund Investor Class	1.05%

Correlation

The correlation between FFNYX and APOIX is 0.88, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (All Time) Calculated using the full available price history since Mar 17, 2026	0.88

Return for Risk

FFNYX vs. APOIX — Risk / Return Rank

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

APOIX

APOIX Risk / Return Rank: 84
APOIX Sharpe Ratio Rank: 71
APOIX Sortino Ratio Rank: 84
APOIX Omega Ratio Rank: 78
APOIX Calmar Ratio Rank: 95
APOIX Martin Ratio Rank: 91

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.

FFNYX vs. APOIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI 0-5 Year Inflation-Protected Bond Index Fund (FFNYX) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	FFNYX	APOIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.45	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.90	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	1.10	—
Sharpe Ratio (All Time) Calculated using the full available price history	2.37	0.72	+1.65

Drawdowns

FFNYX vs. APOIX - Drawdown Comparison

The maximum FFNYX drawdown since its inception was -0.69%, smaller than the maximum APOIX drawdown of -14.54%. Use the drawdown chart below to compare losses from any high point for FFNYX and APOIX.

Drawdown Indicators

	FFNYX	APOIX	Difference
Max Drawdown Largest peak-to-trough decline	-0.69%	-14.54%	+13.85%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.76%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-1.42%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-6.58%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-6.58%	—
Current Drawdown Current decline from peak	-0.10%	-0.00%	-0.10%
Average Drawdown Average peak-to-trough decline	-0.18%	-1.99%	+1.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.23%	—

Volatility

Volatility by Period

	FFNYX	APOIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.51%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.25%	—
Volatility (1Y) Calculated over the trailing 1-year period	1.89%	1.81%	+0.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.89%	3.31%	-1.42%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.89%	2.85%	-0.96%

FFNYX vs. APOIX - Expense Ratio Comparison

FFNYX has a 0.05% expense ratio, which is lower than APOIX's 0.57% expense ratio.

Dividends

FFNYX vs. APOIX - Dividend Comparison

FFNYX's dividend yield for the trailing twelve months is around 0.04%, less than APOIX's 3.91% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
APOIX American Century Short Duration Inflation Protection Bond Fund Investor Class	3.91%	3.99%	2.31%	2.78%	5.63%	3.92%	0.81%	1.69%	3.99%	1.52%	0.42%
FFNYX Fidelity SAI 0-5 Year Inflation-Protected Bond Index Fund	0.04%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FFNYX and APOIX in my portfolio?

FFNYX and APOIX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.