FZIPX vs. PFSLX

Last updated Jun 24, 2026

FZIPX (Fidelity ZERO Extended Market Index Fund) and PFSLX (Paradigm Select Fund) are both Mid Cap Blend Equities funds. Over the past 5 years, FZIPX returned 7.94%/yr vs 15.11%/yr for PFSLX. Their correlation of 0.90 suggests significant overlap in exposure. FZIPX charges 0.00%/yr vs 1.16%/yr for PFSLX.

Performance

FZIPX vs. PFSLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity ZERO Extended Market Index Fund (FZIPX) and Paradigm Select Fund (PFSLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FZIPX achieves a 17.32% return, which is significantly lower than PFSLX's 46.57% return.

FZIPX

• 1D: 0.17%
• 1M: 3.20%
• YTD: 17.32%
• 6M: 14.89%
• 1Y: 33.66%
• 3Y*: 18.74%
• 5Y*: 7.94%
• 10Y*: —

PFSLX

• 1D: 0.76%
• 1M: 9.94%
• YTD: 46.57%
• 6M: 43.69%
• 1Y: 81.70%
• 3Y*: 29.34%
• 5Y*: 15.11%
• 10Y*: 17.81%

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

FZIPX vs. PFSLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FZIPX Fidelity ZERO Extended Market Index Fund	17.32%	12.51%	12.39%	18.13%	-18.01%	21.31%	16.64%	26.50%	-17.57%
PFSLX Paradigm Select Fund	46.57%	13.27%	16.73%	26.94%	-26.44%	31.16%	26.05%	38.32%	-17.43%

Correlation

The correlation between FZIPX and PFSLX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (All Time) Calculated using the full available price history since Sep 28, 2018	0.90

The correlation between FZIPX and PFSLX has been stable across timeframes, ranging from 0.83 to 0.90 - a consistent structural relationship.

Return for Risk

FZIPX vs. PFSLX — Risk / Return Rank

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

FZIPX

FZIPX Risk / Return Rank: 64
FZIPX Sharpe Ratio Rank: 55
FZIPX Sortino Ratio Rank: 53
FZIPX Omega Ratio Rank: 46
FZIPX Calmar Ratio Rank: 83
FZIPX Martin Ratio Rank: 80

PFSLX

PFSLX Risk / Return Rank: 92
PFSLX Sharpe Ratio Rank: 96
PFSLX Sortino Ratio Rank: 87
PFSLX Omega Ratio Rank: 82
PFSLX Calmar Ratio Rank: 98
PFSLX Martin Ratio Rank: 98

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.

FZIPX vs. PFSLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity ZERO Extended Market Index Fund (FZIPX) and Paradigm Select Fund (PFSLX). 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.

	FZIPX	PFSLX	Difference
Sharpe ratio: Return per unit of total volatility	2.01	3.20	-1.19
Sortino ratio: Return per unit of downside risk	2.82	3.90	-1.08
Omega ratio: Gain probability vs. loss probability	1.34	1.50	-0.16
Calmar ratio: Return relative to maximum drawdown	3.65	7.65	-4.00
Martin ratio: Return relative to average drawdown	13.91	29.34	-15.44

FZIPX vs. PFSLX - Sharpe Ratio Comparison

The current FZIPX Sharpe Ratio is 2.01, which is lower than the PFSLX Sharpe Ratio of 3.20. The chart below compares the historical Sharpe Ratios of FZIPX and PFSLX, 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

FZIPX vs. PFSLX - Drawdown Comparison

The maximum FZIPX drawdown since its inception was -42.71%, smaller than the maximum PFSLX drawdown of -91.83%. Use the drawdown chart below to compare losses from any high point for FZIPX and PFSLX.

Drawdown Indicators

	FZIPX	PFSLX	Difference
Max Drawdown Largest peak-to-trough decline	-42.71%	-91.83%	+49.12%
Max Drawdown (1Y) Largest decline over 1 year	-9.61%	-10.91%	+1.30%
Max Drawdown (3Y) Largest decline over 3 years	-25.16%	-91.83%	+66.67%
Max Drawdown (5Y) Largest decline over 5 years	-28.19%	-91.83%	+63.64%
Max Drawdown (10Y) Largest decline over 10 years	—	-91.83%	—
Current Drawdown Current decline from peak	-0.11%	-82.26%	+82.15%
Average Drawdown Average peak-to-trough decline	-8.86%	-13.89%	+5.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.52%	2.84%	-0.32%

Volatility

FZIPX vs. PFSLX - Volatility Comparison

The current volatility for Fidelity ZERO Extended Market Index Fund (FZIPX) is 4.98%, while Paradigm Select Fund (PFSLX) has a volatility of 10.66%. This indicates that FZIPX experiences smaller price fluctuations and is considered to be less risky than PFSLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FZIPX	PFSLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.98%	10.66%	-5.68%
Volatility (6M) Calculated over the trailing 6-month period	12.86%	20.93%	-8.07%
Volatility (1Y) Calculated over the trailing 1-year period	17.48%	26.15%	-8.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.97%	146.11%	-125.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.80%	104.50%	-80.70%

FZIPX vs. PFSLX - Expense Ratio Comparison

FZIPX has a 0.00% expense ratio, which is lower than PFSLX's 1.16% expense ratio.

Dividends

FZIPX vs. PFSLX - Dividend Comparison

FZIPX's dividend yield for the trailing twelve months is around 1.06%, more than PFSLX's 0.10% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FZIPX Fidelity ZERO Extended Market Index Fund	1.06%	1.24%	1.22%	1.43%	1.64%	6.97%	2.15%	1.80%	0.50%	0.00%	0.00%	0.00%
PFSLX Paradigm Select Fund	0.10%	0.14%	0.02%	0.31%	0.01%	0.17%	0.11%	0.58%	2.93%	3.89%	0.74%	9.40%

Frequently Asked Questions

Can I hold both FZIPX and PFSLX in my portfolio?

FZIPX and PFSLX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FZIPX or PFSLX?

PFSLX has higher volatility (10.66%) compared to FZIPX (4.98%). In terms of maximum drawdown, FZIPX dropped -42.71% vs PFSLX's -91.83%.

Which has better risk-adjusted returns?

PFSLX currently has the higher Sharpe Ratio (3.20 vs 2.01), 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.