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TIBGX

Thornburg Investment Income Builder Fund Class R4

Mutual fund

$37.27+0.20 (+0.54%)Close Oct 2, 2026

Feb 1, 2008 – Oct 2, 2026, Dividends reinvested

Final balance
$43,680
CAGR
+8.22%
Max drawdown
−44.04%
Sharpe ratio
0.65

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Growth of $10,000

Trailing returns

Annualized from 3Y
1M
−2.47%
3M
+0.10%
6M
+4.47%
YTD
+15.51%
1Y
+22.55%
3Y
+24.84%
5Y
+15.61%
10Y
+11.52%
15Y
+10.27%
Since 2008
+8.22%

Metrics

Since 2008
Volatility13.71%
Sortino ratio0.88
Calmar ratio0.19
Best year, 2009+36.47%
Worst year, 2022−8.18%
Positive years13 of 17
Longest drawdown2.4 years

Worst drawdowns

Since 2008
DeclinePeakBottomRecoveredLength
−44.0%May 2008Mar 2009Oct 20102.4 years
−34.9%Jan 2020Mar 2020Jan 20211 year
−21.1%Feb 2022Oct 2022Sep 20231.6 years
−20.9%Apr 2015Feb 2016Apr 20172 years
−14.4%Apr 2011Sep 2011Aug 20121.3 years

Annual returns

2008 from Feb 1 · 2026 through Oct 2