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Calvert Ultra-Short Duration Income Fund (CULAX)
Performance
Return for Risk
Dividends
Drawdowns
Volatility

Fund Info

ISIN
US1315826115
CUSIP
131582611
Inception Date
Oct 31, 2006
Min. Investment
$1,000
Distribution Policy
Distributing
Asset Class
Bond

Share Price Chart


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Performance

Performance Chart

The chart shows the growth of an initial investment of $10,000 in Calvert Ultra-Short Duration Income Fund, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.


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S&P 500 Index

Returns By Period

Calvert Ultra-Short Duration Income Fund (CULAX) has returned 0.31% so far this year and 3.71% over the past 12 months. Over the last ten years, CULAX has returned 2.43% per year, falling short of the S&P 500 Index benchmark, which averaged 12.16% annually.


Calvert Ultra-Short Duration Income Fund

1D
0.00%
1M
-0.30%
YTD
0.31%
6M
1.41%
1Y
3.71%
3Y*
5.07%
5Y*
3.22%
10Y*
2.43%

Benchmark (S&P 500 Index)

1D
2.91%
1M
-5.09%
YTD
-4.63%
6M
-2.39%
1Y
16.33%
3Y*
16.69%
5Y*
10.18%
10Y*
12.16%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Monthly Returns

Based on dividend-adjusted daily data since Oct 31, 2006, CULAX's average daily return is +0.01%, while the average monthly return is +0.20%. At this rate, your investment would double in approximately 28.9 years.

Historically, 83% of months were positive and 17% were negative. The best month was Apr 2020 with a return of +1.6%, while the worst month was Mar 2020 at -4.8%. The longest winning streak lasted 41 consecutive months, and the longest losing streak was 6 months.

On a daily basis, CULAX closed higher 19% of trading days. The best single day was Mar 27, 2020 with a return of +1.3%, while the worst single day was Mar 19, 2020 at -1.0%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.31%0.30%-0.30%0.31%
20250.38%0.47%0.27%0.29%0.36%0.46%0.25%0.55%0.34%0.24%0.43%0.42%4.55%
20240.52%0.41%0.52%0.32%0.53%0.42%0.63%0.63%0.50%0.29%0.39%0.39%5.69%
20230.96%0.23%0.15%0.57%0.27%0.58%0.49%0.50%0.41%0.31%0.72%0.73%6.07%
2022-0.25%-0.25%-0.36%-0.23%-0.11%-0.72%0.46%0.19%-0.41%0.12%0.49%0.52%-0.56%
20210.18%0.07%-0.03%0.16%0.06%0.05%0.05%0.04%0.03%-0.06%-0.16%0.04%0.43%

Benchmark Metrics

Calvert Ultra-Short Duration Income Fund has an annualized alpha of 2.36%, beta of 0.00, and R² of 0.00 versus S&P 500 Index. Calculated based on daily prices since November 01, 2006.

  • This fund captured 7.56% of S&P 500 Index gains and tended to rise during its downturns (downside capture of -0.68%) — a profile typical of hedging or uncorrelated assets.
  • Beta of 0.00 may look defensive, but with R² of 0.00 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 0.00 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
2.36%
Beta
0.00
0.00
Upside Capture
7.56%
Downside Capture
-0.68%

Expense Ratio

CULAX has an expense ratio of 0.72%, placing it in the medium range.


Return for Risk

Risk / Return Rank

CULAX ranks 99 for risk / return — in the top 99% of mutual funds on our site. This means strong returns relative to risk — exactly what professional investors look for. Well-suited for investors who want to maximize return per unit of risk.


CULAX Risk / Return Rank: 9999
Overall Rank
CULAX Sharpe Ratio Rank: 9898
Sharpe Ratio Rank
CULAX Sortino Ratio Rank: 9999
Sortino Ratio Rank
CULAX Omega Ratio Rank: 9999
Omega Ratio Rank
CULAX Calmar Ratio Rank: 100100
Calmar Ratio Rank
CULAX Martin Ratio Rank: 9999
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 Calvert Ultra-Short Duration Income Fund (CULAX) and compare them to a chosen benchmark (S&P 500 Index).


CULAXBenchmarkDifference

Sharpe ratio

Return per unit of total volatility

2.95

0.90

+2.06

Sortino ratio

Return per unit of downside risk

9.42

1.39

+8.03

Omega ratio

Gain probability vs. loss probability

3.22

1.21

+2.00

Calmar ratio

Return relative to maximum drawdown

13.55

1.40

+12.15

Martin ratio

Return relative to average drawdown

45.47

6.61

+38.86

Explore CULAX risk-adjusted metrics in detail

Dive deeper into individual metrics with historical trends, benchmark comparisons, and performance across different time periods.

Dividends

Dividend History

Calvert Ultra-Short Duration Income Fund provided a 3.64% dividend yield over the last twelve months, with an annual payout of $0.36 per share.


1.00%2.00%3.00%4.00%5.00%$0.00$0.10$0.20$0.30$0.40$0.5020152016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM20252024202320222021202020192018201720162015
Dividend$0.36$0.41$0.49$0.45$0.14$0.06$0.12$0.24$0.21$0.11$0.11$0.07

Dividend yield

3.64%4.13%4.90%4.52%1.47%0.64%1.25%2.44%2.10%1.13%1.10%0.66%

Monthly Dividends

The table displays the monthly dividend distributions for Calvert Ultra-Short Duration Income Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2026$0.03$0.03$0.00$0.06
2025$0.04$0.04$0.04$0.03$0.04$0.03$0.03$0.03$0.03$0.03$0.03$0.03$0.41
2024$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.49
2023$0.03$0.03$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.04$0.45
2022$0.01$0.01$0.01$0.01$0.01$0.00$0.02$0.02$0.00$0.02$0.03$0.03$0.14
2021$0.01$0.01$0.01$0.01$0.01$0.01$0.01$0.00$0.00$0.00$0.00$0.00$0.06

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 Calvert Ultra-Short Duration Income Fund. 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 Calvert Ultra-Short Duration Income Fund was 7.40%, occurring on Mar 25, 2020. Recovery took 177 trading sessions.

The current Calvert Ultra-Short Duration Income Fund drawdown is 0.30%.


Depth

Start

To Bottom

Bottom

To Recover

End

Total

-7.4%Mar 5, 202015Mar 25, 2020177Dec 4, 2020192
-2.19%Oct 8, 2021192Jul 14, 2022138Jan 31, 2023330
-1.38%Jun 6, 201186Oct 5, 2011107Mar 9, 2012193
-1.19%Aug 6, 200710Aug 17, 200722Sep 19, 200732
-0.93%Sep 15, 200821Oct 13, 200853Dec 29, 200874

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


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