iShares $ Treasury Bond 20+yr UCITS USD (Dist) (IBTL.L): Rolling Returns

Simulation Settings
Category:
Period: January 1793 - May 2026 (~233 years)
Initial Amount: 1£
Currency: GBP
Inflation: UK
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When holding the iShares $ Treasury Bond 20+yr UCITS USD (Dist) (IBTL.L) ETF, how long should you stay invested to have high probability to achieve a positive return?

Over the selected period (~233 years), the longest duration with a negative return was 163 months (from July 1850 to January 1864).

This indicates that, within the same timeframe, any rolling period of 164 months or more has consistently resulted in a positive return.

Understanding this metric is crucial as it highlights the importance of a safe investment horizon. Knowing the minimum duration required to likely see positive returns helps investors set realistic expectations and reinforces the strategy of staying invested through market cycles. This approach can mitigate the emotional reactions to short-term market fluctuations and enhance the likelihood of achieving financial goals.

Previous vs subsequent Returns

Is there a correlation between past and future returns over all 10-year rolling periods?

The following chart illustrates the relationship between past returns (x-axis) and subsequent returns (y-axis).

Data points are aggregated to show occurrences, and you can zoom in by clicking or drawing over the desired area.

ISHARES $ TREASURY BOND 20+YR UCITS USD (DIST) (IBTL.L) ETF
Previous vs Next Returns - 10 Years annualized
Time Period: 1 June 1996 - 31 May 2026 (30 Years)
Time Period: 1 January 1793 - 31 May 2026 (~233 years)
30 Years
(1996/06 - 2026/05)
All Data
(1793/01 - 2026/05)

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As of May 31, 2026, the annualized return of the previous 10 years has been -0.54%.

Rolling Returns

A rolling return is a measure of investment performance that calculates the return of an investment over a set period of time, with the starting date rolling forward. This approach can provide a more accurate representation of the investment's historical performance and helps investors to evaluate the investment's consistency over time.

ISHARES $ TREASURY BOND 20+YR UCITS USD (DIST) (IBTL.L) ETF
Annualized Rolling Returns
Annualized Rolling Returns - Inflation Adjusted
Time Period: 1 June 1996 - 31 May 2026 (30 Years)
Time Period: 1 January 1793 - 31 May 2026 (~233 years)
30 Years
(1996/06 - 2026/05)
All Data
(1793/01 - 2026/05)
UK Inflation Adjusted:

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Rolling Period Analysis

By selecting the 'Rolling Period', the chart and data will update. To study a different date range, change the simulation settings.

ISHARES $ TREASURY BOND 20+YR UCITS USD (DIST) (IBTL.L) ETF
Rolling Returns Chart
Rolling Returns Chart - Inflation Adjusted
Time Period: 1 January 1793 - 31 May 2026 (~233 years)
Over Time
Histogram
UK Inflation Adjusted:

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Worst Median Best Negative Periods
-29.20%
Jan 2009 - Dec 2009
+4.72% +81.73%
Jan 2008 - Dec 2008
21.11%
589 out of 2790
-38.22%
Mar 1979 - Feb 1980
+3.49% +76.35%
Jan 2008 - Dec 2008
34.52%
963 out of 2790
-20.41%
Feb 1862 - Jan 1864
+4.55% +51.98%
May 1981 - Apr 1983
14.00%
389 out of 2778
-26.62%
Mar 1978 - Feb 1980
+3.40% +42.48%
May 1981 - Apr 1983
29.23%
812 out of 2778
-15.55%
Nov 2020 - Oct 2023
+4.70% +43.01%
Feb 1982 - Jan 1985
10.16%
281 out of 2766
-23.38%
Mar 1977 - Feb 1980
+3.43% +36.17%
Feb 1982 - Jan 1985
27.26%
754 out of 2766
-12.83%
May 2020 - Apr 2024
+4.88% +39.22%
Feb 1981 - Jan 1985
7.37%
203 out of 2754
-21.94%
Nov 1976 - Oct 1980
+3.73% +30.44%
Feb 1981 - Jan 1985
25.42%
700 out of 2754
-11.15%
Jul 2020 - Jun 2025
+4.99% +34.95%
Apr 1981 - Mar 1986
6.13%
168 out of 2742
-15.60%
Nov 1976 - Oct 1981
+3.67% +27.21%
Apr 1981 - Mar 1986
23.96%
657 out of 2742
-9.03%
May 2020 - Apr 2026
+5.04% +31.96%
Nov 1980 - Oct 1986
3.66%
100 out of 2730
-13.03%
May 2020 - Apr 2026
+3.96% +24.34%
Nov 1980 - Oct 1986
22.16%
605 out of 2730
-4.44%
Feb 1857 - Jan 1864
+5.12% +26.37%
Mar 1980 - Feb 1987
3.72%
101 out of 2718
-11.92%
Dec 1973 - Nov 1980
+4.00% +18.25%
Mar 1980 - Feb 1987
21.04%
572 out of 2718
-3.27%
Feb 1856 - Jan 1864
+5.13% +21.67%
Sep 1981 - Aug 1989
2.88%
78 out of 2706
-11.54%
Nov 1972 - Oct 1980
+3.98% +15.91%
Sep 1981 - Aug 1989
19.96%
540 out of 2706
-2.89%
Sep 2016 - Aug 2025
+5.19% +22.15%
Nov 1980 - Oct 1989
2.08%
56 out of 2694
-10.02%
Nov 1971 - Oct 1980
+3.91% +15.58%
Nov 1980 - Oct 1989
18.23%
491 out of 2694
-1.83%
Feb 1854 - Jan 1864
+5.13% +18.78%
May 1981 - Apr 1991
1.16%
31 out of 2682
-9.08%
Apr 1971 - Mar 1981
+3.96% +12.47%
May 1981 - Apr 1991
18.61%
499 out of 2682
-1.15%
Feb 1853 - Jan 1864
+5.10% +18.99%
Mar 1982 - Feb 1993
0.56%
15 out of 2670
-8.42%
Nov 1969 - Oct 1980
+3.89% +13.31%
Mar 1982 - Feb 1993
18.88%
504 out of 2670
-0.72%
Feb 1852 - Jan 1864
+5.08% +19.88%
Mar 1981 - Feb 1993
0.38%
10 out of 2658
-8.53%
Nov 1968 - Oct 1980
+3.92% +13.63%
Mar 1981 - Feb 1993
20.20%
537 out of 2658
-0.16%
Feb 1851 - Jan 1864
+5.00% +19.72%
Nov 1980 - Oct 1993
0.08%
2 out of 2646
-7.99%
Feb 1968 - Jan 1981
+3.93% +13.49%
Nov 1980 - Oct 1993
19.58%
518 out of 2646
+0.12%
Feb 1850 - Jan 1864
+4.95% +17.87%
Mar 1980 - Feb 1994
0.00%
0 out of 2634
-7.11%
May 1967 - Apr 1981
+4.00% +11.91%
Feb 1982 - Jan 1996
18.30%
482 out of 2634
+0.53%
Feb 1849 - Jan 1864
+5.03% +17.62%
Feb 1981 - Jan 1996
0.00%
0 out of 2622
-6.67%
Nov 1965 - Oct 1980
+4.16% +12.09%
Feb 1981 - Jan 1996
18.15%
476 out of 2622
+0.86%
Sep 1950 - Aug 1966
+5.07% +16.39%
Mar 1980 - Feb 1996
0.00%
0 out of 2610
-6.45%
Nov 1964 - Oct 1980
+4.26% +10.93%
Mar 1864 - Feb 1880
17.62%
460 out of 2610
+1.28%
Mar 1950 - Feb 1967
+5.01% +15.80%
Feb 1981 - Jan 1998
0.00%
0 out of 2598
-6.09%
Nov 1963 - Oct 1980
+4.26% +10.86%
Feb 1864 - Jan 1881
17.32%
450 out of 2598
+1.36%
Jun 1952 - May 1970
+5.06% +15.65%
Nov 1980 - Oct 1998
0.00%
0 out of 2586
-5.81%
Nov 1962 - Oct 1980
+4.09% +10.68%
Feb 1981 - Jan 1999
16.94%
438 out of 2586
+1.13%
Jan 1951 - Dec 1969
+5.07% +14.88%
Mar 1980 - Feb 1999
0.00%
0 out of 2574
-5.46%
Nov 1961 - Oct 1980
+4.08% +10.43%
Sep 1981 - Aug 2000
16.20%
417 out of 2574
+1.09%
Jun 1950 - May 1970
+5.02% +15.11%
Dec 1980 - Nov 2000
0.00%
0 out of 2562
-5.29%
Nov 1960 - Oct 1980
+3.96% +10.67%
May 1981 - Apr 2001
16.43%
421 out of 2562
+2.28%
Apr 1950 - Mar 1975
+4.95% +12.78%
Jan 1981 - Dec 2005
0.00%
0 out of 2502
-4.65%
Nov 1955 - Oct 1980
+4.13% +8.88%
Jan 1981 - Dec 2005
14.75%
369 out of 2502
+2.22%
Mar 1950 - Feb 1980
+5.10% +12.28%
Oct 1981 - Sep 2011
0.00%
0 out of 2442
-4.66%
Nov 1950 - Oct 1980
+4.01% +8.71%
Oct 1981 - Sep 2011
11.96%
292 out of 2442
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