NPFI vs. SDSI

Last updated Jun 23, 2026

NPFI (Nuveen Preferred And Income ETF) and SDSI (American Century Short Duration Strategic Income ETF) are both exchange-traded funds - NPFI is a Preferred Stock/Convertible Bonds fund actively managed by Nuveen, while SDSI is a Short-Term Bond fund tracking the Bloomberg U.S. 1-3 Year Government/Credit Bond Index. NPFI is actively managed, while SDSI is passively managed. Over the past year, NPFI returned 7.29% vs 4.89% for SDSI. At a 0.41 correlation, their price movements are largely independent. NPFI charges 0.55%/yr vs 0.33%/yr for SDSI.

Performance

NPFI vs. SDSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen Preferred And Income ETF (NPFI) and American Century Short Duration Strategic Income ETF (SDSI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NPFI achieves a 1.79% return, which is significantly higher than SDSI's 1.28% return.

NPFI

• 1D: 0.00%
• 1M: 0.57%
• YTD: 1.79%
• 6M: 1.93%
• 1Y: 7.29%
• 3Y*: —
• 5Y*: —
• 10Y*: —

SDSI

• 1D: -0.05%
• 1M: 0.29%
• YTD: 1.28%
• 6M: 1.46%
• 1Y: 4.89%
• 3Y*: 5.83%
• 5Y*: —
• 10Y*: —

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

NPFI vs. SDSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
NPFI Nuveen Preferred And Income ETF	1.79%	9.21%	6.37%
SDSI American Century Short Duration Strategic Income ETF	1.28%	6.54%	5.00%

Correlation

The correlation between NPFI and SDSI is 0.53, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.53
Correlation (All Time) Calculated using the full available price history since Mar 6, 2024	0.41

The correlation between NPFI and SDSI shifts across timeframes, from 0.41 (all time) to 0.53 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

NPFI vs. SDSI — Risk / Return Rank

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

NPFI

NPFI Risk / Return Rank: 74
NPFI Sharpe Ratio Rank: 81
NPFI Sortino Ratio Rank: 88
NPFI Omega Ratio Rank: 91
NPFI Calmar Ratio Rank: 48
NPFI Martin Ratio Rank: 63

SDSI

SDSI Risk / Return Rank: 90
SDSI Sharpe Ratio Rank: 92
SDSI Sortino Ratio Rank: 94
SDSI Omega Ratio Rank: 93
SDSI Calmar Ratio Rank: 83
SDSI Martin Ratio Rank: 90

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.

NPFI vs. SDSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen Preferred And Income ETF (NPFI) and American Century Short Duration Strategic Income ETF (SDSI). 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.

	NPFI	SDSI	Difference
Sharpe ratio: Return per unit of total volatility	2.48	3.05	-0.57
Sortino ratio: Return per unit of downside risk	3.81	4.63	-0.82
Omega ratio: Gain probability vs. loss probability	1.57	1.62	-0.05
Calmar ratio: Return relative to maximum drawdown	2.30	4.20	-1.89
Martin ratio: Return relative to average drawdown	11.08	19.76	-8.68

NPFI vs. SDSI - Sharpe Ratio Comparison

The current NPFI Sharpe Ratio is 2.48, which is comparable to the SDSI Sharpe Ratio of 3.05. The chart below compares the historical Sharpe Ratios of NPFI and SDSI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

NPFI vs. SDSI - Drawdown Comparison

The maximum NPFI drawdown since its inception was -3.18%, which is greater than SDSI's maximum drawdown of -1.29%. Use the drawdown chart below to compare losses from any high point for NPFI and SDSI.

Drawdown Indicators

	NPFI	SDSI	Difference
Max Drawdown Largest peak-to-trough decline	-3.18%	-1.29%	-1.89%
Max Drawdown (1Y) Largest decline over 1 year	-3.18%	-1.17%	-2.01%
Max Drawdown (3Y) Largest decline over 3 years	—	-1.29%	—
Current Drawdown Current decline from peak	-0.08%	-0.14%	+0.06%
Average Drawdown Average peak-to-trough decline	-0.33%	-0.24%	-0.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.66%	0.25%	+0.41%

Volatility

NPFI vs. SDSI - Volatility Comparison

Nuveen Preferred And Income ETF (NPFI) has a higher volatility of 0.64% compared to American Century Short Duration Strategic Income ETF (SDSI) at 0.49%. This indicates that NPFI's price experiences larger fluctuations and is considered to be riskier than SDSI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NPFI	SDSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.64%	0.49%	+0.15%
Volatility (6M) Calculated over the trailing 6-month period	2.56%	1.20%	+1.36%
Volatility (1Y) Calculated over the trailing 1-year period	2.95%	1.61%	+1.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.94%	2.27%	+0.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.94%	2.27%	+0.67%

NPFI vs. SDSI - Expense Ratio Comparison

NPFI has a 0.55% expense ratio, which is higher than SDSI's 0.33% expense ratio.

Dividends

NPFI vs. SDSI - Dividend Comparison

NPFI's dividend yield for the trailing twelve months is around 6.40%, more than SDSI's 4.79% yield.

Position	TTM	2025	2024	2023	2022
NPFI Nuveen Preferred And Income ETF	6.40%	6.33%	5.10%	0.00%	0.00%
SDSI American Century Short Duration Strategic Income ETF	4.79%	4.91%	5.49%	5.37%	0.98%

Frequently Asked Questions

Can I hold both NPFI and SDSI in my portfolio?

NPFI and SDSI have a correlation of 0.53, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NPFI or SDSI?

NPFI has higher volatility (0.64%) compared to SDSI (0.49%). In terms of maximum drawdown, NPFI dropped -3.18% vs SDSI's -1.29%.

Which ETF is better, NPFI or SDSI?

On 1-year performance, NPFI leads with 7.29% vs 4.89% for SDSI. On fees, SDSI is cheaper at 0.33% per year. On volatility, SDSI has been the lower-risk option at 0.49%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, NPFI or SDSI?

Over the 1-year period, NPFI has performed better with a 7.29% return vs 4.89%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, NPFI or SDSI?

SDSI is cheaper with a 0.33% expense ratio, compared with 0.55% for NPFI.

Which ETF pays a higher dividend yield, NPFI or SDSI?

NPFI has the higher dividend yield at 6.40%, compared with 4.79% for SDSI.

What is the main difference between NPFI and SDSI?

NPFI is categorized as Preferred Stock/Convertible Bonds, while SDSI is Short-Term Bond. They also come from different issuers: Nuveen and American Century. Their fees differ too: 0.55% for NPFI and 0.33% for SDSI.

Which has better risk-adjusted returns?

SDSI currently has the higher Sharpe Ratio (3.05 vs 2.48), 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.