FSPSX vs. THOIX

Last updated Jun 24, 2026

FSPSX (Fidelity International Index Fund) and THOIX (Thornburg Global Opportunities Fund) are both Foreign Large Cap Equities funds. Over the past 10 years, FSPSX returned 10.29%/yr vs 13.98%/yr for THOIX. A 0.80 correlation means they provide meaningful diversification when combined. FSPSX charges 0.04%/yr vs 0.99%/yr for THOIX.

Performance

FSPSX vs. THOIX - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with FSPSX having a 10.74% return and THOIX slightly higher at 11.06%. Over the past 10 years, FSPSX has underperformed THOIX with an annualized return of 10.29%, while THOIX has yielded a comparatively higher 13.98% annualized return.

FSPSX

• 1D: 0.18%
• 1M: 2.11%
• YTD: 10.74%
• 6M: 10.40%
• 1Y: 24.77%
• 3Y*: 17.73%
• 5Y*: 9.39%
• 10Y*: 10.29%

THOIX

• 1D: -0.67%
• 1M: -0.88%
• YTD: 11.06%
• 6M: 11.55%
• 1Y: 35.93%
• 3Y*: 24.74%
• 5Y*: 13.76%
• 10Y*: 13.98%

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

FSPSX vs. THOIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSPSX Fidelity International Index Fund	10.74%	31.98%	3.70%	18.31%	-14.23%	11.45%	8.16%	22.03%	-13.55%	25.37%
THOIX Thornburg Global Opportunities Fund	11.06%	41.04%	13.08%	16.26%	-10.12%	14.72%	22.50%	28.74%	-20.72%	22.03%

Correlation

The correlation between FSPSX and THOIX is 0.62, 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	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.80
Correlation (All Time) Calculated using the full available price history since Sep 8, 2011	0.80

The correlation between FSPSX and THOIX shifts across timeframes, from 0.62 (1 year) to 0.80 (all time), reflecting how their relationship changes across market environments.

Return for Risk

FSPSX vs. THOIX — Risk / Return Rank

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

FSPSX

FSPSX Risk / Return Rank: 39
FSPSX Sharpe Ratio Rank: 40
FSPSX Sortino Ratio Rank: 38
FSPSX Omega Ratio Rank: 38
FSPSX Calmar Ratio Rank: 39
FSPSX Martin Ratio Rank: 42

THOIX

THOIX Risk / Return Rank: 91
THOIX Sharpe Ratio Rank: 95
THOIX Sortino Ratio Rank: 90
THOIX Omega Ratio Rank: 89
THOIX Calmar Ratio Rank: 89
THOIX Martin Ratio Rank: 92

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.

FSPSX vs. THOIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity International Index Fund (FSPSX) and Thornburg Global Opportunities Fund (THOIX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	FSPSX	THOIX	Difference
Sharpe ratio: Return per unit of total volatility	1.69	3.11	-1.42
Sortino ratio: Return per unit of downside risk	2.39	4.10	-1.70
Omega ratio: Gain probability vs. loss probability	1.31	1.60	-0.29
Calmar ratio: Return relative to maximum drawdown	2.26	4.17	-1.91
Martin ratio: Return relative to average drawdown	8.48	17.37	-8.89

FSPSX vs. THOIX - Sharpe Ratio Comparison

The current FSPSX Sharpe Ratio is 1.69, which is lower than the THOIX Sharpe Ratio of 3.11. The chart below compares the historical Sharpe Ratios of FSPSX and THOIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

FSPSX vs. THOIX - Drawdown Comparison

The maximum FSPSX drawdown since its inception was -33.69%, smaller than the maximum THOIX drawdown of -64.58%. Use the drawdown chart below to compare losses from any high point for FSPSX and THOIX.

Drawdown Indicators

	FSPSX	THOIX	Difference
Max Drawdown Largest peak-to-trough decline	-33.69%	-64.58%	+30.89%
Max Drawdown (1Y) Largest decline over 1 year	-11.39%	-8.62%	-2.77%
Max Drawdown (3Y) Largest decline over 3 years	-13.58%	-13.71%	+0.13%
Max Drawdown (5Y) Largest decline over 5 years	-29.41%	-30.18%	+0.77%
Max Drawdown (10Y) Largest decline over 10 years	-33.69%	-35.22%	+1.53%
Current Drawdown Current decline from peak	0.00%	-3.19%	+3.19%
Average Drawdown Average peak-to-trough decline	-6.53%	-11.44%	+4.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.04%	2.06%	+0.98%

Volatility

FSPSX vs. THOIX - Volatility Comparison

Fidelity International Index Fund (FSPSX) has a higher volatility of 4.77% compared to Thornburg Global Opportunities Fund (THOIX) at 4.35%. This indicates that FSPSX's price experiences larger fluctuations and is considered to be riskier than THOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSPSX	THOIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.77%	4.35%	+0.42%
Volatility (6M) Calculated over the trailing 6-month period	12.68%	9.17%	+3.51%
Volatility (1Y) Calculated over the trailing 1-year period	15.26%	11.57%	+3.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.07%	16.48%	-0.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.53%	17.54%	-1.01%

FSPSX vs. THOIX - Expense Ratio Comparison

FSPSX has a 0.04% expense ratio, which is lower than THOIX's 0.99% expense ratio.

Dividends

FSPSX vs. THOIX - Dividend Comparison

FSPSX's dividend yield for the trailing twelve months is around 2.85%, less than THOIX's 5.78% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSPSX Fidelity International Index Fund	2.85%	3.15%	3.27%	2.79%	2.66%	3.07%	1.84%	3.18%	2.79%	2.50%	3.08%	2.79%
THOIX Thornburg Global Opportunities Fund	5.78%	6.42%	5.70%	5.70%	4.00%	14.39%	6.70%	1.47%	2.65%	0.67%	0.82%	0.59%

Frequently Asked Questions

Can I hold both FSPSX and THOIX in my portfolio?

FSPSX and THOIX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSPSX or THOIX?

FSPSX has higher volatility (4.77%) compared to THOIX (4.35%). In terms of maximum drawdown, FSPSX dropped -33.69% vs THOIX's -64.58%.

Which has better risk-adjusted returns?

THOIX currently has the higher Sharpe Ratio (3.11 vs 1.69), 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.