ETHSX vs. FBTCX

Last updated Jun 24, 2026

ETHSX (Eaton Vance Worldwide Health Sciences Fund) and FBTCX (Fidelity Advisor Biotechnology Fund Class C) are both Health & Biotech Equities funds. Over the past 10 years, ETHSX returned 7.72%/yr vs 11.82%/yr for FBTCX. Their correlation of 0.81 suggests significant overlap in exposure. ETHSX charges 1.20%/yr vs 1.75%/yr for FBTCX.

Performance

ETHSX vs. FBTCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Eaton Vance Worldwide Health Sciences Fund (ETHSX) and Fidelity Advisor Biotechnology Fund Class C (FBTCX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ETHSX achieves a -6.02% return, which is significantly lower than FBTCX's 11.67% return. Over the past 10 years, ETHSX has underperformed FBTCX with an annualized return of 7.72%, while FBTCX has yielded a comparatively higher 11.82% annualized return.

ETHSX

• 1D: 1.30%
• 1M: -0.40%
• YTD: -6.02%
• 6M: -6.52%
• 1Y: 6.22%
• 3Y*: 3.49%
• 5Y*: 2.83%
• 10Y*: 7.72%

FBTCX

• 1D: 5.15%
• 1M: 8.09%
• YTD: 11.67%
• 6M: 9.05%
• 1Y: 63.57%
• 3Y*: 18.46%
• 5Y*: 8.45%
• 10Y*: 11.82%

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

ETHSX vs. FBTCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ETHSX Eaton Vance Worldwide Health Sciences Fund	-6.02%	10.23%	3.48%	5.67%	-9.41%	22.02%	13.04%	25.99%	5.87%	16.24%
FBTCX Fidelity Advisor Biotechnology Fund Class C	11.67%	38.48%	-2.00%	9.86%	-8.64%	-3.72%	31.17%	24.82%	-4.55%	24.81%

Correlation

The correlation between ETHSX and FBTCX is 0.61, 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	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.64
Correlation (5Y) Calculated over the trailing 5-year period	0.65
Correlation (10Y) Calculated over the trailing 10-year period	0.71
Correlation (All Time) Calculated using the full available price history since Dec 27, 2000	0.81

Over the past year, the correlation between ETHSX and FBTCX has dropped to 0.61 - well below their long-term average of 0.81, suggesting their price drivers have been diverging.

Return for Risk

ETHSX vs. FBTCX — Risk / Return Rank

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

ETHSX

ETHSX Risk / Return Rank: 6
ETHSX Sharpe Ratio Rank: 6
ETHSX Sortino Ratio Rank: 6
ETHSX Omega Ratio Rank: 6
ETHSX Calmar Ratio Rank: 6
ETHSX Martin Ratio Rank: 6

FBTCX

FBTCX Risk / Return Rank: 87
FBTCX Sharpe Ratio Rank: 89
FBTCX Sortino Ratio Rank: 83
FBTCX Omega Ratio Rank: 72
FBTCX Calmar Ratio Rank: 97
FBTCX Martin Ratio Rank: 94

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.

ETHSX vs. FBTCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Eaton Vance Worldwide Health Sciences Fund (ETHSX) and Fidelity Advisor Biotechnology Fund Class C (FBTCX). 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.

	ETHSX	FBTCX	Difference
Sharpe ratio: Return per unit of total volatility	0.42	2.72	-2.29
Sortino ratio: Return per unit of downside risk	0.75	3.62	-2.87
Omega ratio: Gain probability vs. loss probability	1.08	1.43	-0.35
Calmar ratio: Return relative to maximum drawdown	0.53	6.97	-6.44
Martin ratio: Return relative to average drawdown	1.21	19.09	-17.88

ETHSX vs. FBTCX - Sharpe Ratio Comparison

The current ETHSX Sharpe Ratio is 0.42, which is lower than the FBTCX Sharpe Ratio of 2.72. The chart below compares the historical Sharpe Ratios of ETHSX and FBTCX, 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

ETHSX vs. FBTCX - Drawdown Comparison

The maximum ETHSX drawdown since its inception was -90.06%, which is greater than FBTCX's maximum drawdown of -64.04%. Use the drawdown chart below to compare losses from any high point for ETHSX and FBTCX.

Drawdown Indicators

	ETHSX	FBTCX	Difference
Max Drawdown Largest peak-to-trough decline	-90.06%	-64.04%	-26.02%
Max Drawdown (1Y) Largest decline over 1 year	-12.35%	-9.04%	-3.31%
Max Drawdown (3Y) Largest decline over 3 years	-18.91%	-37.26%	+18.35%
Max Drawdown (5Y) Largest decline over 5 years	-19.58%	-37.26%	+17.68%
Max Drawdown (10Y) Largest decline over 10 years	-27.43%	-39.37%	+11.94%
Current Drawdown Current decline from peak	-10.53%	0.00%	-10.53%
Average Drawdown Average peak-to-trough decline	-43.93%	-23.04%	-20.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.37%	3.29%	+2.08%

Volatility

ETHSX vs. FBTCX - Volatility Comparison

The current volatility for Eaton Vance Worldwide Health Sciences Fund (ETHSX) is 5.38%, while Fidelity Advisor Biotechnology Fund Class C (FBTCX) has a volatility of 9.23%. This indicates that ETHSX experiences smaller price fluctuations and is considered to be less risky than FBTCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ETHSX	FBTCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.38%	9.23%	-3.85%
Volatility (6M) Calculated over the trailing 6-month period	10.91%	18.04%	-7.13%
Volatility (1Y) Calculated over the trailing 1-year period	15.38%	23.23%	-7.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.99%	23.84%	-8.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.28%	24.56%	-8.28%

ETHSX vs. FBTCX - Expense Ratio Comparison

ETHSX has a 1.20% expense ratio, which is lower than FBTCX's 1.75% expense ratio.

Dividends

ETHSX vs. FBTCX - Dividend Comparison

ETHSX's dividend yield for the trailing twelve months is around 7.84%, more than FBTCX's 1.51% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ETHSX Eaton Vance Worldwide Health Sciences Fund	7.84%	7.36%	4.81%	2.48%	4.43%	8.25%	7.33%	5.39%	5.51%	2.82%	12.75%	9.70%
FBTCX Fidelity Advisor Biotechnology Fund Class C	1.51%	1.68%	0.00%	0.00%	0.00%	24.50%	9.78%	7.92%	2.92%	0.00%	0.00%	5.73%

Frequently Asked Questions

Can I hold both ETHSX and FBTCX in my portfolio?

ETHSX and FBTCX have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ETHSX or FBTCX?

FBTCX has higher volatility (9.23%) compared to ETHSX (5.38%). In terms of maximum drawdown, ETHSX dropped -90.06% vs FBTCX's -64.04%.

Which has better risk-adjusted returns?

FBTCX currently has the higher Sharpe Ratio (2.72 vs 0.42), 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.