FSPHX vs. PDFDX

Last updated Jun 4, 2026

FSPHX (Fidelity® Select Health Care Portfolio) and PDFDX (Perkins Discovery Fund) are both Health & Biotech Equities funds. Over the past 10 years, FSPHX returned 8.41%/yr vs 9.82%/yr for PDFDX. A 0.58 correlation means they provide meaningful diversification when combined. FSPHX charges 0.69%/yr vs 2.50%/yr for PDFDX.

Performance

FSPHX vs. PDFDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity® Select Health Care Portfolio (FSPHX) and Perkins Discovery Fund (PDFDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSPHX achieves a -5.41% return, which is significantly lower than PDFDX's 1.98% return. Over the past 10 years, FSPHX has underperformed PDFDX with an annualized return of 8.41%, while PDFDX has yielded a comparatively higher 9.82% annualized return.

FSPHX

• 1D: -1.81%
• 1M: -1.00%
• YTD: -5.41%
• 6M: -12.69%
• 1Y: 6.59%
• 3Y*: 3.11%
• 5Y*: 1.14%
• 10Y*: 8.41%

PDFDX

• 1D: -0.19%
• 1M: 5.46%
• YTD: 1.98%
• 6M: 2.97%
• 1Y: 31.05%
• 3Y*: 8.77%
• 5Y*: -4.76%
• 10Y*: 9.82%

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

FSPHX vs. PDFDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSPHX Fidelity® Select Health Care Portfolio	-5.41%	9.36%	4.91%	4.13%	-12.82%	11.58%	24.57%	31.48%	7.15%	23.83%
PDFDX Perkins Discovery Fund	1.98%	9.94%	19.19%	10.77%	-39.93%	2.11%	62.16%	15.01%	22.19%	11.58%

Correlation

The correlation between FSPHX and PDFDX is 0.59, 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	0.59
Correlation (3Y) Calculated over the trailing 3-year period	0.64
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (10Y) Calculated over the trailing 10-year period	0.72
Correlation (All Time) Calculated using the full available price history since Apr 9, 1998	0.58

The correlation between FSPHX and PDFDX shifts across timeframes, from 0.58 (all time) to 0.72 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

FSPHX vs. PDFDX — Risk / Return Rank

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

FSPHX

FSPHX Risk / Return Rank: 5
FSPHX Sharpe Ratio Rank: 5
FSPHX Sortino Ratio Rank: 5
FSPHX Omega Ratio Rank: 5
FSPHX Calmar Ratio Rank: 4
FSPHX Martin Ratio Rank: 4

PDFDX

PDFDX Risk / Return Rank: 19
PDFDX Sharpe Ratio Rank: 20
PDFDX Sortino Ratio Rank: 22
PDFDX Omega Ratio Rank: 18
PDFDX Calmar Ratio Rank: 18
PDFDX Martin Ratio Rank: 15

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.

FSPHX vs. PDFDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity® Select Health Care Portfolio (FSPHX) and Perkins Discovery Fund (PDFDX). 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.

	FSPHX	PDFDX	Difference
Sharpe ratio: Return per unit of total volatility	0.40	1.29	-0.89
Sortino ratio: Return per unit of downside risk	0.65	2.00	-1.35
Omega ratio: Gain probability vs. loss probability	1.08	1.22	-0.14
Calmar ratio: Return relative to maximum drawdown	0.38	1.52	-1.14
Martin ratio: Return relative to average drawdown	0.85	4.28	-3.44
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FSPHX vs. PDFDX - Sharpe Ratio Comparison

The current FSPHX Sharpe Ratio is 0.40, which is lower than the PDFDX Sharpe Ratio of 1.29. The chart below compares the historical Sharpe Ratios of FSPHX and PDFDX, 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

	FSPHX	PDFDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.40	1.29	-0.89
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.06	-0.16	+0.22
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.44	0.34	+0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.75	0.38	+0.37

Drawdowns

FSPHX vs. PDFDX - Drawdown Comparison

The maximum FSPHX drawdown since its inception was -44.45%, smaller than the maximum PDFDX drawdown of -67.44%. Use the drawdown chart below to compare losses from any high point for FSPHX and PDFDX.

Drawdown Indicators

	FSPHX	PDFDX	Difference
Max Drawdown Largest peak-to-trough decline	-44.45%	-67.44%	+22.99%
Max Drawdown (1Y) Largest decline over 1 year	-18.32%	-22.11%	+3.79%
Max Drawdown (3Y) Largest decline over 3 years	-18.32%	-31.75%	+13.43%
Max Drawdown (5Y) Largest decline over 5 years	-29.31%	-59.95%	+30.64%
Max Drawdown (10Y) Largest decline over 10 years	-29.31%	-62.70%	+33.39%
Current Drawdown Current decline from peak	-14.46%	-34.65%	+20.19%
Average Drawdown Average peak-to-trough decline	-9.83%	-25.72%	+15.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.20%	7.80%	+0.40%

Volatility

FSPHX vs. PDFDX - Volatility Comparison

The current volatility for Fidelity® Select Health Care Portfolio (FSPHX) is 5.10%, while Perkins Discovery Fund (PDFDX) has a volatility of 6.50%. This indicates that FSPHX experiences smaller price fluctuations and is considered to be less risky than PDFDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSPHX	PDFDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.10%	6.50%	-1.40%
Volatility (6M) Calculated over the trailing 6-month period	14.42%	18.09%	-3.67%
Volatility (1Y) Calculated over the trailing 1-year period	17.61%	26.02%	-8.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.32%	29.80%	-11.48%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.02%	28.96%	-9.94%

FSPHX vs. PDFDX - Expense Ratio Comparison

FSPHX has a 0.69% expense ratio, which is lower than PDFDX's 2.50% expense ratio.

Dividends

FSPHX vs. PDFDX - Dividend Comparison

FSPHX's dividend yield for the trailing twelve months is around 12.88%, more than PDFDX's 9.60% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSPHX Fidelity® Select Health Care Portfolio	12.88%	4.16%	10.77%	0.00%	2.13%	9.06%	11.29%	1.35%	9.02%	2.27%	0.18%	11.63%
PDFDX Perkins Discovery Fund	9.60%	4.25%	0.00%	0.00%	1.78%	31.11%	1.71%	0.00%	0.58%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSPHX and PDFDX in my portfolio?

FSPHX and PDFDX have a correlation of 0.59, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSPHX or PDFDX?

PDFDX has higher volatility (6.50%) compared to FSPHX (5.10%). In terms of maximum drawdown, FSPHX dropped -44.45% vs PDFDX's -67.44%.

Which has better risk-adjusted returns?

PDFDX currently has the higher Sharpe Ratio (1.29 vs 0.40), 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.