FITFX vs. PTSIX

Last updated Jun 4, 2026

FITFX (Fidelity Flex International Index Fund) and PTSIX (PIMCO RAE PLUS International Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, FITFX returned 9.17%/yr vs 9.37%/yr for PTSIX. A 0.68 correlation means they provide meaningful diversification when combined. FITFX charges 0.00%/yr vs 0.82%/yr for PTSIX.

Performance

FITFX vs. PTSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Flex International Index Fund (FITFX) and PIMCO RAE PLUS International Fund (PTSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FITFX achieves a 16.24% return, which is significantly higher than PTSIX's 14.61% return.

FITFX

• 1D: 0.72%
• 1M: 6.16%
• YTD: 16.24%
• 6M: 19.13%
• 1Y: 34.57%
• 3Y*: 20.37%
• 5Y*: 9.17%
• 10Y*: —

PTSIX

• 1D: 0.39%
• 1M: 3.23%
• YTD: 14.61%
• 6M: 16.68%
• 1Y: 34.85%
• 3Y*: 20.77%
• 5Y*: 9.37%
• 10Y*: 9.98%

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

FITFX vs. PTSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FITFX Fidelity Flex International Index Fund	16.24%	33.21%	5.37%	15.45%	-15.72%	7.76%	10.77%	21.44%	-13.97%	21.09%
PTSIX PIMCO RAE PLUS International Fund	14.61%	35.74%	2.54%	18.35%	-11.35%	10.70%	0.48%	18.29%	-16.33%	22.97%

Correlation

The correlation between FITFX and PTSIX is 0.64, 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	0.64
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 Mar 10, 2017	0.68

The correlation between FITFX and PTSIX has been stable across timeframes, ranging from 0.64 to 0.68 - a consistent structural relationship.

Return for Risk

FITFX vs. PTSIX — Risk / Return Rank

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

FITFX

FITFX Risk / Return Rank: 61
FITFX Sharpe Ratio Rank: 64
FITFX Sortino Ratio Rank: 57
FITFX Omega Ratio Rank: 61
FITFX Calmar Ratio Rank: 63
FITFX Martin Ratio Rank: 60

PTSIX

PTSIX Risk / Return Rank: 81
PTSIX Sharpe Ratio Rank: 90
PTSIX Sortino Ratio Rank: 86
PTSIX Omega Ratio Rank: 80
PTSIX Calmar Ratio Rank: 82
PTSIX Martin Ratio Rank: 69

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.

FITFX vs. PTSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex International Index Fund (FITFX) and PIMCO RAE PLUS International Fund (PTSIX). 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.

	FITFX	PTSIX	Difference
Sharpe ratio Return per unit of total volatility	2.35	2.96	-0.61
Sortino ratio Return per unit of downside risk	3.17	4.12	-0.95
Omega ratio Gain probability vs. loss probability	1.43	1.53	-0.09
Calmar ratio Return relative to maximum drawdown	3.06	3.78	-0.72
Martin ratio Return relative to average drawdown	11.95	13.26	-1.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FITFX vs. PTSIX - Sharpe Ratio Comparison

The current FITFX Sharpe Ratio is 2.35, which is comparable to the PTSIX Sharpe Ratio of 2.96. The chart below compares the historical Sharpe Ratios of FITFX and PTSIX, 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

	FITFX	PTSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.35	2.96	-0.61
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.63	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.62	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.57	+0.04

Drawdowns

FITFX vs. PTSIX - Drawdown Comparison

The maximum FITFX drawdown since its inception was -34.84%, smaller than the maximum PTSIX drawdown of -46.94%. Use the drawdown chart below to compare losses from any high point for FITFX and PTSIX.

Drawdown Indicators

	FITFX	PTSIX	Difference
Max Drawdown Largest peak-to-trough decline	-34.84%	-46.94%	+12.10%
Max Drawdown (1Y) Largest decline over 1 year	-11.22%	-9.12%	-2.10%
Max Drawdown (3Y) Largest decline over 3 years	-13.35%	-15.62%	+2.27%
Max Drawdown (5Y) Largest decline over 5 years	-29.74%	-30.45%	+0.71%
Max Drawdown (10Y) Largest decline over 10 years	—	-46.94%	—
Current Drawdown Current decline from peak	0.00%	-1.29%	+1.29%
Average Drawdown Average peak-to-trough decline	-7.44%	-9.48%	+2.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.86%	2.59%	+0.27%

Volatility

FITFX vs. PTSIX - Volatility Comparison

Fidelity Flex International Index Fund (FITFX) has a higher volatility of 4.92% compared to PIMCO RAE PLUS International Fund (PTSIX) at 2.47%. This indicates that FITFX's price experiences larger fluctuations and is considered to be riskier than PTSIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FITFX	PTSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.92%	2.47%	+2.45%
Volatility (6M) Calculated over the trailing 6-month period	12.26%	8.96%	+3.30%
Volatility (1Y) Calculated over the trailing 1-year period	14.64%	11.68%	+2.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.38%	15.04%	+0.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.34%	16.23%	+0.11%

FITFX vs. PTSIX - Expense Ratio Comparison

FITFX has a 0.00% expense ratio, which is lower than PTSIX's 0.82% expense ratio.

Dividends

FITFX vs. PTSIX - Dividend Comparison

FITFX's dividend yield for the trailing twelve months is around 2.48%, less than PTSIX's 4.07% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FITFX Fidelity Flex International Index Fund	2.48%	2.88%	2.77%	2.67%	2.60%	2.25%	1.50%	2.54%	1.92%	1.70%	0.00%	0.00%
PTSIX PIMCO RAE PLUS International Fund	4.07%	3.62%	7.01%	3.18%	67.07%	223.75%	7.45%	3.49%	29.39%	7.86%	0.84%	3.54%

Frequently Asked Questions

Can I hold both FITFX and PTSIX in my portfolio?

FITFX and PTSIX have a correlation of 0.64, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FITFX or PTSIX?

FITFX has higher volatility (4.92%) compared to PTSIX (2.47%). In terms of maximum drawdown, FITFX dropped -34.84% vs PTSIX's -46.94%.

Which has better risk-adjusted returns?

PTSIX currently has the higher Sharpe Ratio (2.96 vs 2.35), 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.