PTTRX vs. FSSNX

Last updated Jun 13, 2026

PTTRX (PIMCO Total Return Fund Institutional Class) and FSSNX (Fidelity Small Cap Index Fund) are both mutual funds - PTTRX is a Total Bond Market fund managed by PIMCO, while FSSNX is a Small Cap Blend Equities fund tracking the Russell 2000 Index. Over the past 10 years, PTTRX returned 2.29%/yr vs 11.30%/yr for FSSNX. At a correlation of -0.06, they often move in opposite directions. PTTRX charges 0.47%/yr vs 0.03%/yr for FSSNX.

Performance

PTTRX vs. FSSNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Total Return Fund Institutional Class (PTTRX) and Fidelity Small Cap Index Fund (FSSNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PTTRX achieves a 0.64% return, which is significantly lower than FSSNX's 18.33% return. Over the past 10 years, PTTRX has underperformed FSSNX with an annualized return of 2.29%, while FSSNX has yielded a comparatively higher 11.30% annualized return.

PTTRX

• 1D: 0.69%
• 1M: 0.88%
• YTD: 0.64%
• 6M: 1.49%
• 1Y: 6.46%
• 3Y*: 5.45%
• 5Y*: 0.58%
• 10Y*: 2.29%

FSSNX

• 1D: 3.04%
• 1M: 2.84%
• YTD: 18.33%
• 6M: 15.24%
• 1Y: 38.39%
• 3Y*: 17.71%
• 5Y*: 6.13%
• 10Y*: 11.30%

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

PTTRX vs. FSSNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PTTRX PIMCO Total Return Fund Institutional Class	0.64%	9.35%	2.62%	6.33%	-14.72%	-0.59%	8.88%	8.36%	-0.24%	5.13%
FSSNX Fidelity Small Cap Index Fund	18.33%	12.94%	11.71%	17.11%	-20.28%	14.70%	19.99%	25.70%	-11.24%	14.54%

Correlation

The correlation between PTTRX and FSSNX is 0.31, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.31
Correlation (3Y) Calculated over the trailing 3-year period	0.26
Correlation (5Y) Calculated over the trailing 5-year period	0.17
Correlation (10Y) Calculated over the trailing 10-year period	-0.01
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	-0.06

The correlation between PTTRX and FSSNX shifts across timeframes, from -0.06 (all time) to 0.31 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

PTTRX vs. FSSNX — Risk / Return Rank

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

PTTRX

PTTRX Risk / Return Rank: 38
PTTRX Sharpe Ratio Rank: 41
PTTRX Sortino Ratio Rank: 43
PTTRX Omega Ratio Rank: 42
PTTRX Calmar Ratio Rank: 36
PTTRX Martin Ratio Rank: 30

FSSNX

FSSNX Risk / Return Rank: 73
FSSNX Sharpe Ratio Rank: 70
FSSNX Sortino Ratio Rank: 68
FSSNX Omega Ratio Rank: 57
FSSNX Calmar Ratio Rank: 86
FSSNX Martin Ratio Rank: 82

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.

PTTRX vs. FSSNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Total Return Fund Institutional Class (PTTRX) and Fidelity Small Cap Index Fund (FSSNX). 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.

	PTTRX	FSSNX	Difference
Sharpe ratio: Return per unit of total volatility	1.47	1.93	-0.46
Sortino ratio: Return per unit of downside risk	2.17	2.68	-0.51
Omega ratio: Gain probability vs. loss probability	1.27	1.32	-0.05
Calmar ratio: Return relative to maximum drawdown	1.83	3.46	-1.63
Martin ratio: Return relative to average drawdown	5.48	12.23	-6.75

PTTRX vs. FSSNX - Sharpe Ratio Comparison

The current PTTRX Sharpe Ratio is 1.47, which is comparable to the FSSNX Sharpe Ratio of 1.93. The chart below compares the historical Sharpe Ratios of PTTRX and FSSNX, 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

PTTRX vs. FSSNX - Drawdown Comparison

The maximum PTTRX drawdown since its inception was -19.28%, smaller than the maximum FSSNX drawdown of -41.72%. Use the drawdown chart below to compare losses from any high point for PTTRX and FSSNX.

Drawdown Indicators

	PTTRX	FSSNX	Difference
Max Drawdown Largest peak-to-trough decline	-19.28%	-41.72%	+22.44%
Max Drawdown (1Y) Largest decline over 1 year	-3.69%	-11.00%	+7.31%
Max Drawdown (3Y) Largest decline over 3 years	-6.18%	-27.45%	+21.27%
Max Drawdown (5Y) Largest decline over 5 years	-19.28%	-31.87%	+12.59%
Max Drawdown (10Y) Largest decline over 10 years	-19.28%	-41.72%	+22.44%
Current Drawdown Current decline from peak	-1.49%	-0.46%	-1.03%
Average Drawdown Average peak-to-trough decline	-2.19%	-8.28%	+6.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.23%	3.11%	-1.88%

Volatility

PTTRX vs. FSSNX - Volatility Comparison

The current volatility for PIMCO Total Return Fund Institutional Class (PTTRX) is 1.77%, while Fidelity Small Cap Index Fund (FSSNX) has a volatility of 7.09%. This indicates that PTTRX experiences smaller price fluctuations and is considered to be less risky than FSSNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PTTRX	FSSNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.77%	7.09%	-5.32%
Volatility (6M) Calculated over the trailing 6-month period	3.61%	14.37%	-10.76%
Volatility (1Y) Calculated over the trailing 1-year period	4.63%	19.71%	-15.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.28%	22.68%	-16.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.23%	23.49%	-18.26%

PTTRX vs. FSSNX - Expense Ratio Comparison

PTTRX has a 0.47% expense ratio, which is higher than FSSNX's 0.03% expense ratio.

Dividends

PTTRX vs. FSSNX - Dividend Comparison

PTTRX's dividend yield for the trailing twelve months is around 4.54%, more than FSSNX's 0.92% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSSNX Fidelity Small Cap Index Fund	0.92%	1.08%	1.04%	1.43%	1.26%	3.92%	0.94%	2.96%	4.94%	3.37%	2.27%	2.66%
PTTRX PIMCO Total Return Fund Institutional Class	4.54%	4.47%	4.61%	3.81%	3.63%	2.59%	6.11%	3.96%	3.13%	2.63%	3.02%	6.64%

Frequently Asked Questions

Can I hold both PTTRX and FSSNX in my portfolio?

PTTRX and FSSNX have a correlation of 0.31, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PTTRX or FSSNX?

FSSNX has higher volatility (7.09%) compared to PTTRX (1.77%). In terms of maximum drawdown, PTTRX dropped -19.28% vs FSSNX's -41.72%.

Which has better risk-adjusted returns?

FSSNX currently has the higher Sharpe Ratio (1.93 vs 1.47), 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.