SIGAX vs. VLTCX

Last updated Jun 4, 2026

SIGAX (Western Asset Corporate Bond Fund) and VLTCX (Vanguard Long-Term Corporate Bond Index Fund Admiral Shares) are both Corporate Bonds funds. Over the past 10 years, SIGAX returned 2.57%/yr vs 2.42%/yr for VLTCX. Their correlation of 0.83 suggests significant overlap in exposure. SIGAX charges 0.88%/yr vs 0.07%/yr for VLTCX.

Performance

SIGAX vs. VLTCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Western Asset Corporate Bond Fund (SIGAX) and Vanguard Long-Term Corporate Bond Index Fund Admiral Shares (VLTCX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SIGAX achieves a 0.41% return, which is significantly lower than VLTCX's 1.22% return. Over the past 10 years, SIGAX has outperformed VLTCX with an annualized return of 2.57%, while VLTCX has yielded a comparatively lower 2.42% annualized return.

SIGAX

• 1D: 0.00%
• 1M: 0.89%
• YTD: 0.41%
• 6M: 0.36%
• 1Y: 6.43%
• 3Y*: 4.79%
• 5Y*: -0.21%
• 10Y*: 2.57%

VLTCX

• 1D: 0.10%
• 1M: 1.99%
• YTD: 1.22%
• 6M: 0.35%
• 1Y: 8.16%
• 3Y*: 4.67%
• 5Y*: -1.46%
• 10Y*: 2.42%

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

SIGAX vs. VLTCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SIGAX Western Asset Corporate Bond Fund	0.41%	8.16%	1.19%	6.96%	-17.20%	-1.17%	10.81%	14.42%	-3.64%	7.20%
VLTCX Vanguard Long-Term Corporate Bond Index Fund Admiral Shares	1.22%	7.27%	-1.47%	11.05%	-25.77%	-1.16%	13.68%	23.19%	-6.85%	12.40%

Correlation

The correlation between SIGAX and VLTCX is 0.89, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.89
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Nov 24, 2009	0.83

The correlation between SIGAX and VLTCX shifts across timeframes, from 0.83 (all time) to 0.93 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

SIGAX vs. VLTCX — Risk / Return Rank

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

SIGAX

SIGAX Risk / Return Rank: 28
SIGAX Sharpe Ratio Rank: 29
SIGAX Sortino Ratio Rank: 31
SIGAX Omega Ratio Rank: 28
SIGAX Calmar Ratio Rank: 24
SIGAX Martin Ratio Rank: 27

VLTCX

VLTCX Risk / Return Rank: 16
VLTCX Sharpe Ratio Rank: 16
VLTCX Sortino Ratio Rank: 15
VLTCX Omega Ratio Rank: 14
VLTCX Calmar Ratio Rank: 19
VLTCX Martin Ratio Rank: 14

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.

SIGAX vs. VLTCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Western Asset Corporate Bond Fund (SIGAX) and Vanguard Long-Term Corporate Bond Index Fund Admiral Shares (VLTCX). 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.

	SIGAX	VLTCX	Difference
Sharpe ratio Return per unit of total volatility	1.54	1.11	+0.44
Sortino ratio Return per unit of downside risk	2.33	1.62	+0.70
Omega ratio Gain probability vs. loss probability	1.28	1.19	+0.09
Calmar ratio Return relative to maximum drawdown	1.83	1.60	+0.23
Martin ratio Return relative to average drawdown	6.47	3.93	+2.53
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SIGAX vs. VLTCX - Sharpe Ratio Comparison

The current SIGAX Sharpe Ratio is 1.54, which is higher than the VLTCX Sharpe Ratio of 1.11. The chart below compares the historical Sharpe Ratios of SIGAX and VLTCX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	SIGAX	VLTCX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.54	1.11	+0.44
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.03	-0.12	+0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.42	0.23	+0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.73	0.45	+0.28

Drawdowns

SIGAX vs. VLTCX - Drawdown Comparison

The maximum SIGAX drawdown since its inception was -30.99%, smaller than the maximum VLTCX drawdown of -34.56%. Use the drawdown chart below to compare losses from any high point for SIGAX and VLTCX.

Drawdown Indicators

	SIGAX	VLTCX	Difference
Max Drawdown Largest peak-to-trough decline	-30.99%	-34.56%	+3.57%
Max Drawdown (1Y) Largest decline over 1 year	-3.58%	-5.29%	+1.71%
Max Drawdown (3Y) Largest decline over 3 years	-7.52%	-12.87%	+5.35%
Max Drawdown (5Y) Largest decline over 5 years	-23.62%	-34.56%	+10.94%
Max Drawdown (10Y) Largest decline over 10 years	-23.62%	-34.56%	+10.94%
Current Drawdown Current decline from peak	-4.38%	-13.80%	+9.42%
Average Drawdown Average peak-to-trough decline	-5.02%	-8.04%	+3.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.01%	2.15%	-1.14%

Volatility

SIGAX vs. VLTCX - Volatility Comparison

The current volatility for Western Asset Corporate Bond Fund (SIGAX) is 1.48%, while Vanguard Long-Term Corporate Bond Index Fund Admiral Shares (VLTCX) has a volatility of 2.46%. This indicates that SIGAX experiences smaller price fluctuations and is considered to be less risky than VLTCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SIGAX	VLTCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.48%	2.46%	-0.98%
Volatility (6M) Calculated over the trailing 6-month period	3.14%	5.52%	-2.38%
Volatility (1Y) Calculated over the trailing 1-year period	4.26%	7.68%	-3.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.78%	11.87%	-5.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.14%	10.60%	-4.46%

SIGAX vs. VLTCX - Expense Ratio Comparison

SIGAX has a 0.88% expense ratio, which is higher than VLTCX's 0.07% expense ratio.

Dividends

SIGAX vs. VLTCX - Dividend Comparison

SIGAX's dividend yield for the trailing twelve months is around 4.45%, less than VLTCX's 5.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SIGAX Western Asset Corporate Bond Fund	4.45%	4.86%	4.15%	4.17%	3.30%	3.03%	4.33%	3.78%	3.85%	3.44%	3.82%	4.34%
VLTCX Vanguard Long-Term Corporate Bond Index Fund Admiral Shares	5.50%	5.48%	5.58%	4.65%	4.41%	3.03%	3.15%	3.82%	4.56%	4.01%	4.37%	4.71%

Frequently Asked Questions

Can I hold both SIGAX and VLTCX in my portfolio?

SIGAX and VLTCX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SIGAX or VLTCX?

VLTCX has higher volatility (2.46%) compared to SIGAX (1.48%). In terms of maximum drawdown, SIGAX dropped -30.99% vs VLTCX's -34.56%.

Which has better risk-adjusted returns?

SIGAX currently has the higher Sharpe Ratio (1.54 vs 1.11), 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.