TGGBX vs. FBIIX

Last updated Jun 4, 2026

TGGBX (TCW Global Bond Fund) and FBIIX (Fidelity International Bond Index Fund) are both Global Bonds funds. Over the past 5 years, TGGBX returned -1.41%/yr vs 0.80%/yr for FBIIX. A 0.64 correlation means they provide meaningful diversification when combined. TGGBX charges 0.60%/yr vs 0.06%/yr for FBIIX.

Performance

TGGBX vs. FBIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TCW Global Bond Fund (TGGBX) and Fidelity International Bond Index Fund (FBIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TGGBX achieves a 0.12% return, which is significantly lower than FBIIX's 0.83% return.

TGGBX

• 1D: 0.12%
• 1M: 0.24%
• YTD: 0.12%
• 6M: 0.35%
• 1Y: 3.32%
• 3Y*: 4.25%
• 5Y*: -1.41%
• 10Y*: 1.04%

FBIIX

• 1D: 0.11%
• 1M: 0.99%
• YTD: 0.83%
• 6M: 0.60%
• 1Y: 2.22%
• 3Y*: 4.12%
• 5Y*: 0.80%
• 10Y*: —

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

TGGBX vs. FBIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
TGGBX TCW Global Bond Fund	0.12%	10.17%	-2.27%	7.01%	-17.09%	-4.71%	12.29%	0.75%
FBIIX Fidelity International Bond Index Fund	0.83%	2.66%	4.64%	7.48%	-10.84%	-1.84%	4.43%	-1.13%

Correlation

The correlation between TGGBX and FBIIX is 0.66, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.66
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (All Time) Calculated using the full available price history since Oct 11, 2019	0.64

The correlation between TGGBX and FBIIX has been stable across timeframes, ranging from 0.64 to 0.67 - a consistent structural relationship.

Return for Risk

TGGBX vs. FBIIX — Risk / Return Rank

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

TGGBX

TGGBX Risk / Return Rank: 7
TGGBX Sharpe Ratio Rank: 7
TGGBX Sortino Ratio Rank: 7
TGGBX Omega Ratio Rank: 7
TGGBX Calmar Ratio Rank: 8
TGGBX Martin Ratio Rank: 7

FBIIX

FBIIX Risk / Return Rank: 8
FBIIX Sharpe Ratio Rank: 9
FBIIX Sortino Ratio Rank: 9
FBIIX Omega Ratio Rank: 9
FBIIX Calmar Ratio Rank: 8
FBIIX Martin Ratio Rank: 8

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.

TGGBX vs. FBIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TCW Global Bond Fund (TGGBX) and Fidelity International Bond Index Fund (FBIIX). 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.

	TGGBX	FBIIX	Difference
Sharpe ratio: Return per unit of total volatility	0.59	0.74	-0.15
Sortino ratio: Return per unit of downside risk	0.93	1.08	-0.15
Omega ratio: Gain probability vs. loss probability	1.11	1.14	-0.04
Calmar ratio: Return relative to maximum drawdown	0.74	0.80	-0.06
Martin ratio: Return relative to average drawdown	2.09	2.24	-0.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TGGBX vs. FBIIX - Sharpe Ratio Comparison

The current TGGBX Sharpe Ratio is 0.59, which is comparable to the FBIIX Sharpe Ratio of 0.74. The chart below compares the historical Sharpe Ratios of TGGBX and FBIIX, 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

	TGGBX	FBIIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.59	0.74	-0.15
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.21	0.22	-0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.18	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.29	0.23	+0.07

Drawdowns

TGGBX vs. FBIIX - Drawdown Comparison

The maximum TGGBX drawdown since its inception was -27.37%, which is greater than FBIIX's maximum drawdown of -13.79%. Use the drawdown chart below to compare losses from any high point for TGGBX and FBIIX.

Drawdown Indicators

	TGGBX	FBIIX	Difference
Max Drawdown Largest peak-to-trough decline	-27.37%	-13.79%	-13.58%
Max Drawdown (1Y) Largest decline over 1 year	-4.16%	-2.78%	-1.38%
Max Drawdown (3Y) Largest decline over 3 years	-8.55%	-2.78%	-5.77%
Max Drawdown (5Y) Largest decline over 5 years	-26.20%	-13.74%	-12.46%
Max Drawdown (10Y) Largest decline over 10 years	-27.37%	—	—
Current Drawdown Current decline from peak	-9.04%	-1.11%	-7.93%
Average Drawdown Average peak-to-trough decline	-6.47%	-4.12%	-2.35%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.48%	0.99%	+0.49%

Volatility

TGGBX vs. FBIIX - Volatility Comparison

TCW Global Bond Fund (TGGBX) has a higher volatility of 1.84% compared to Fidelity International Bond Index Fund (FBIIX) at 1.33%. This indicates that TGGBX's price experiences larger fluctuations and is considered to be riskier than FBIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TGGBX	FBIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.84%	1.33%	+0.51%
Volatility (6M) Calculated over the trailing 6-month period	4.05%	2.65%	+1.40%
Volatility (1Y) Calculated over the trailing 1-year period	5.21%	2.99%	+2.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.80%	3.59%	+3.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.79%	3.42%	+2.37%

TGGBX vs. FBIIX - Expense Ratio Comparison

TGGBX has a 0.60% expense ratio, which is higher than FBIIX's 0.06% expense ratio.

Dividends

TGGBX vs. FBIIX - Dividend Comparison

TGGBX's dividend yield for the trailing twelve months is around 4.17%, which matches FBIIX's 4.18% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBIIX Fidelity International Bond Index Fund	4.18%	4.09%	3.44%	2.85%	1.02%	0.62%	0.74%	0.17%	0.00%	0.00%	0.00%	0.00%
TGGBX TCW Global Bond Fund	4.17%	4.12%	2.99%	3.65%	1.97%	1.93%	3.70%	4.18%	0.50%	1.88%	2.91%	2.25%

Frequently Asked Questions

Can I hold both TGGBX and FBIIX in my portfolio?

TGGBX and FBIIX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TGGBX or FBIIX?

TGGBX has higher volatility (1.84%) compared to FBIIX (1.33%). In terms of maximum drawdown, TGGBX dropped -27.37% vs FBIIX's -13.79%.

Which has better risk-adjusted returns?

FBIIX currently has the higher Sharpe Ratio (0.74 vs 0.59), 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.