CDSRX vs. PULS

Last updated Jun 23, 2026

CDSRX (Calvert Short Duration Income Fund Class R6) and PULS (PGIM Ultra Short Bond ETF) are both funds - CDSRX is a Short-Term Bond fund managed by Calvert Research and Management, while PULS is a Ultrashort Bond fund actively managed by PGIM. Over the past 5 years, CDSRX returned 2.83%/yr vs 4.16%/yr for PULS. At a 0.37 correlation, their price movements are largely independent. CDSRX charges 0.45%/yr vs 0.15%/yr for PULS.

Performance

CDSRX vs. PULS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calvert Short Duration Income Fund Class R6 (CDSRX) and PGIM Ultra Short Bond ETF (PULS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CDSRX achieves a 0.63% return, which is significantly lower than PULS's 1.90% return.

CDSRX

• 1D: 0.06%
• 1M: 0.38%
• YTD: 0.63%
• 6M: 1.09%
• 1Y: 4.42%
• 3Y*: 5.75%
• 5Y*: 2.83%
• 10Y*: —

PULS

• 1D: 0.00%
• 1M: 0.26%
• YTD: 1.90%
• 6M: 2.03%
• 1Y: 4.59%
• 3Y*: 5.51%
• 5Y*: 4.16%
• 10Y*: —

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

CDSRX vs. PULS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
CDSRX Calvert Short Duration Income Fund Class R6	0.63%	6.35%	5.74%	6.87%	-5.07%	1.20%	4.82%	4.87%
PULS PGIM Ultra Short Bond ETF	1.90%	4.97%	6.12%	6.26%	1.52%	0.48%	1.47%	2.51%

Correlation

The correlation between CDSRX and PULS is 0.47, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.47
Correlation (3Y) Calculated over the trailing 3-year period	0.47
Correlation (5Y) Calculated over the trailing 5-year period	0.44
Correlation (All Time) Calculated using the full available price history since Feb 7, 2019	0.37

The correlation between CDSRX and PULS shifts across timeframes, from 0.37 (all time) to 0.47 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

CDSRX vs. PULS — Risk / Return Rank

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

CDSRX

CDSRX Risk / Return Rank: 71
CDSRX Sharpe Ratio Rank: 63
CDSRX Sortino Ratio Rank: 88
CDSRX Omega Ratio Rank: 80
CDSRX Calmar Ratio Rank: 62
CDSRX Martin Ratio Rank: 61

PULS

PULS Risk / Return Rank: 99
PULS Sharpe Ratio Rank: 99
PULS Sortino Ratio Rank: 99
PULS Omega Ratio Rank: 99
PULS Calmar Ratio Rank: 99
PULS Martin Ratio Rank: 99

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.

CDSRX vs. PULS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calvert Short Duration Income Fund Class R6 (CDSRX) and PGIM Ultra Short Bond ETF (PULS). 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.

	CDSRX	PULS	Difference
Sharpe ratio: Return per unit of total volatility	2.14	10.75	-8.61
Sortino ratio: Return per unit of downside risk	3.93	27.89	-23.96
Omega ratio: Gain probability vs. loss probability	1.48	6.78	-5.30
Calmar ratio: Return relative to maximum drawdown	2.89	51.29	-48.40
Martin ratio: Return relative to average drawdown	11.36	293.54	-282.18

CDSRX vs. PULS - Sharpe Ratio Comparison

The current CDSRX Sharpe Ratio is 2.14, which is lower than the PULS Sharpe Ratio of 10.75. The chart below compares the historical Sharpe Ratios of CDSRX and PULS, 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

CDSRX vs. PULS - Drawdown Comparison

The maximum CDSRX drawdown since its inception was -9.96%, which is greater than PULS's maximum drawdown of -5.85%. Use the drawdown chart below to compare losses from any high point for CDSRX and PULS.

Drawdown Indicators

	CDSRX	PULS	Difference
Max Drawdown Largest peak-to-trough decline	-9.96%	-5.85%	-4.11%
Max Drawdown (1Y) Largest decline over 1 year	-1.56%	-0.09%	-1.47%
Max Drawdown (3Y) Largest decline over 3 years	-1.56%	-0.34%	-1.22%
Max Drawdown (5Y) Largest decline over 5 years	-7.91%	-0.79%	-7.12%
Current Drawdown Current decline from peak	-0.38%	0.00%	-0.38%
Average Drawdown Average peak-to-trough decline	-1.36%	-0.09%	-1.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.40%	0.02%	+0.38%

Volatility

CDSRX vs. PULS - Volatility Comparison

Calvert Short Duration Income Fund Class R6 (CDSRX) has a higher volatility of 0.67% compared to PGIM Ultra Short Bond ETF (PULS) at 0.15%. This indicates that CDSRX's price experiences larger fluctuations and is considered to be riskier than PULS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CDSRX	PULS	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.67%	0.15%	+0.52%
Volatility (6M) Calculated over the trailing 6-month period	1.59%	0.32%	+1.27%
Volatility (1Y) Calculated over the trailing 1-year period	2.11%	0.43%	+1.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.43%	0.70%	+1.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.66%	1.33%	+1.33%

CDSRX vs. PULS - Expense Ratio Comparison

CDSRX has a 0.45% expense ratio, which is higher than PULS's 0.15% expense ratio.

Dividends

CDSRX vs. PULS - Dividend Comparison

CDSRX's dividend yield for the trailing twelve months is around 4.68%, more than PULS's 4.57% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
CDSRX Calvert Short Duration Income Fund Class R6	4.68%	4.55%	4.98%	3.52%	2.21%	2.56%	2.88%	2.75%	0.00%
PULS PGIM Ultra Short Bond ETF	4.57%	4.78%	5.62%	5.48%	2.30%	1.19%	1.85%	2.69%	1.87%

Frequently Asked Questions

Can I hold both CDSRX and PULS in my portfolio?

CDSRX and PULS have a correlation of 0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CDSRX or PULS?

CDSRX has higher volatility (0.67%) compared to PULS (0.15%). In terms of maximum drawdown, CDSRX dropped -9.96% vs PULS's -5.85%.

Which has better risk-adjusted returns?

PULS currently has the higher Sharpe Ratio (10.75 vs 2.14), 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.