TLDIX vs. BUSIX

Last updated Jun 4, 2026

TLDIX (Thornburg Ultra Short Income Fund) and BUSIX (Sterling Capital Ultra Short Bond Fund) are both Ultrashort Bond funds. At a 0.41 correlation, their price movements are largely independent. TLDIX charges 0.76%/yr vs 0.27%/yr for BUSIX.

Performance

TLDIX vs. BUSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thornburg Ultra Short Income Fund (TLDIX) and Sterling Capital Ultra Short Bond Fund (BUSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

TLDIX

• 1D: 0.00%
• 1M: 0.28%
• YTD: 1.42%
• 6M: 1.80%
• 1Y: 4.19%
• 3Y*: 5.07%
• 5Y*: 3.40%
• 10Y*: 2.80%

BUSIX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

TLDIX vs. BUSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TLDIX Thornburg Ultra Short Income Fund	1.42%	4.84%	5.81%	4.92%	-0.00%	0.32%	3.26%	3.87%	1.90%	1.39%
BUSIX Sterling Capital Ultra Short Bond Fund	0.83%	4.93%	5.87%	5.09%	0.32%	0.31%	2.16%	3.27%	1.66%	1.37%

Correlation

The correlation between TLDIX and BUSIX is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.30
Correlation (3Y) Calculated over the trailing 3-year period	0.44
Correlation (5Y) Calculated over the trailing 5-year period	0.44
Correlation (10Y) Calculated over the trailing 10-year period	0.43
Correlation (All Time) Calculated using the full available price history since Jan 3, 2014	0.41

The correlation between TLDIX and BUSIX shifts across timeframes, from 0.30 (1 year) to 0.44 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

TLDIX vs. BUSIX — Risk / Return Rank

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

TLDIX

TLDIX Risk / Return Rank: 99
TLDIX Sharpe Ratio Rank: 96
TLDIX Sortino Ratio Rank: 100
TLDIX Omega Ratio Rank: 100
TLDIX Calmar Ratio Rank: 99
TLDIX Martin Ratio Rank: 100

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.

TLDIX vs. BUSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thornburg Ultra Short Income Fund (TLDIX) and Sterling Capital Ultra Short Bond Fund (BUSIX). 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.

	TLDIX	BUSIX	Difference
Sharpe ratio: Return per unit of total volatility	3.55	—	—
Sortino ratio: Return per unit of downside risk	15.07	—	—
Omega ratio: Gain probability vs. loss probability	5.43	—	—
Calmar ratio: Return relative to maximum drawdown	17.12	—	—
Martin ratio: Return relative to average drawdown	83.37	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	TLDIX	BUSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.55	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	2.61	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	2.23	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	2.09	—	—

Drawdowns

Drawdown Indicators

	TLDIX	BUSIX	Difference
Max Drawdown Largest peak-to-trough decline	-3.43%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-0.25%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-0.25%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-1.39%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-3.43%	—	—
Current Drawdown Current decline from peak	0.00%	—	—
Average Drawdown Average peak-to-trough decline	-0.16%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	0.05%	—	—

Volatility

Volatility by Period

	TLDIX	BUSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.14%	—	—
Volatility (6M) Calculated over the trailing 6-month period	0.62%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	1.19%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.31%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.26%	—	—

TLDIX vs. BUSIX - Expense Ratio Comparison

TLDIX has a 0.76% expense ratio, which is higher than BUSIX's 0.27% expense ratio.

Dividends

TLDIX vs. BUSIX - Dividend Comparison

TLDIX's dividend yield for the trailing twelve months is around 4.44%, more than BUSIX's 3.19% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUSIX Sterling Capital Ultra Short Bond Fund	3.19%	4.29%	4.65%	3.48%	1.87%	1.24%	1.72%	2.60%	2.05%	1.57%	1.74%	1.36%
TLDIX Thornburg Ultra Short Income Fund	4.44%	4.89%	5.64%	4.12%	2.12%	1.53%	2.32%	2.82%	2.37%	1.62%	1.24%	0.89%

Frequently Asked Questions

Can I hold both TLDIX and BUSIX in my portfolio?

TLDIX and BUSIX have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.