FBTTX vs. ETHSX

Last updated Jun 5, 2026

FBTTX (Fidelity Advisor Biotechnology Fund Class M) and ETHSX (Eaton Vance Worldwide Health Sciences Fund) are both Health & Biotech Equities funds. Over the past 10 years, FBTTX returned 10.36%/yr vs 6.65%/yr for ETHSX. Their correlation of 0.82 suggests significant overlap in exposure. FBTTX charges 1.28%/yr vs 1.20%/yr for ETHSX.

Performance

FBTTX vs. ETHSX - Performance Comparison

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

Returns By Period

In the year-to-date period, FBTTX achieves a 0.47% return, which is significantly higher than ETHSX's -8.58% return. Over the past 10 years, FBTTX has outperformed ETHSX with an annualized return of 10.36%, while ETHSX has yielded a comparatively lower 6.65% annualized return.

FBTTX

• 1D: 1.43%
• 1M: -4.77%
• YTD: 0.47%
• 6M: -3.36%
• 1Y: 46.56%
• 3Y*: 17.25%
• 5Y*: 9.15%
• 10Y*: 10.36%

ETHSX

• 1D: 0.41%
• 1M: -1.46%
• YTD: -8.58%
• 6M: -7.33%
• 1Y: 2.43%
• 3Y*: 2.72%
• 5Y*: 2.86%
• 10Y*: 6.65%

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

FBTTX vs. ETHSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FBTTX Fidelity Advisor Biotechnology Fund Class M	0.47%	39.21%	5.08%	10.43%	-8.22%	-3.35%	31.82%	25.39%	-4.19%	25.37%
ETHSX Eaton Vance Worldwide Health Sciences Fund	-8.58%	10.23%	3.48%	5.67%	-9.41%	22.02%	13.04%	25.99%	5.87%	16.24%

Correlation

The correlation between FBTTX and ETHSX is 0.62, 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	0.62
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 28, 2000	0.82

The correlation between FBTTX and ETHSX shifts across timeframes, from 0.62 (1 year) to 0.82 (all time), reflecting how their relationship changes across market environments.

Return for Risk

FBTTX vs. ETHSX — Risk / Return Rank

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

FBTTX

FBTTX Risk / Return Rank: 64
FBTTX Sharpe Ratio Rank: 52
FBTTX Sortino Ratio Rank: 48
FBTTX Omega Ratio Rank: 42
FBTTX Calmar Ratio Rank: 93
FBTTX Martin Ratio Rank: 82

ETHSX

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

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.

FBTTX vs. ETHSX - Risk-Adjusted Trends Comparison

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

	FBTTX	ETHSX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	0.19	+1.91
Sortino ratio: Return per unit of downside risk	2.87	0.40	+2.48
Omega ratio: Gain probability vs. loss probability	1.34	1.04	+0.30
Calmar ratio: Return relative to maximum drawdown	5.17	0.24	+4.94
Martin ratio: Return relative to average drawdown	14.95	0.57	+14.38
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FBTTX vs. ETHSX - Sharpe Ratio Comparison

The current FBTTX Sharpe Ratio is 2.10, which is higher than the ETHSX Sharpe Ratio of 0.19. The chart below compares the historical Sharpe Ratios of FBTTX and ETHSX, 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

	FBTTX	ETHSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	0.19	+1.91
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.39	0.19	+0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.43	0.41	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.30	0.10	+0.20

Drawdowns

FBTTX vs. ETHSX - Drawdown Comparison

The maximum FBTTX drawdown since its inception was -63.75%, smaller than the maximum ETHSX drawdown of -90.06%. Use the drawdown chart below to compare losses from any high point for FBTTX and ETHSX.

Drawdown Indicators

	FBTTX	ETHSX	Difference
Max Drawdown Largest peak-to-trough decline	-63.75%	-90.06%	+26.31%
Max Drawdown (1Y) Largest decline over 1 year	-8.94%	-12.35%	+3.41%
Max Drawdown (3Y) Largest decline over 3 years	-32.91%	-18.91%	-14.00%
Max Drawdown (5Y) Largest decline over 5 years	-36.64%	-19.58%	-17.06%
Max Drawdown (10Y) Largest decline over 10 years	-39.04%	-27.43%	-11.61%
Current Drawdown Current decline from peak	-7.64%	-12.97%	+5.33%
Average Drawdown Average peak-to-trough decline	-21.83%	-44.06%	+22.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.09%	5.12%	-2.03%

Volatility

FBTTX vs. ETHSX - Volatility Comparison

Fidelity Advisor Biotechnology Fund Class M (FBTTX) has a higher volatility of 6.86% compared to Eaton Vance Worldwide Health Sciences Fund (ETHSX) at 4.37%. This indicates that FBTTX's price experiences larger fluctuations and is considered to be riskier than ETHSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FBTTX	ETHSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.86%	4.37%	+2.49%
Volatility (6M) Calculated over the trailing 6-month period	16.64%	10.37%	+6.27%
Volatility (1Y) Calculated over the trailing 1-year period	22.03%	15.06%	+6.97%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.47%	14.91%	+8.56%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.41%	16.24%	+8.17%

FBTTX vs. ETHSX - Expense Ratio Comparison

FBTTX has a 1.28% expense ratio, which is higher than ETHSX's 1.20% expense ratio.

Dividends

FBTTX vs. ETHSX - Dividend Comparison

FBTTX's dividend yield for the trailing twelve months is around 1.53%, less than ETHSX's 8.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ETHSX Eaton Vance Worldwide Health Sciences Fund	8.06%	7.36%	4.81%	2.48%	4.43%	8.25%	7.33%	5.39%	5.51%	2.82%	12.75%	9.70%
FBTTX Fidelity Advisor Biotechnology Fund Class M	1.53%	1.53%	6.41%	0.93%	0.00%	21.60%	8.79%	7.10%	2.64%	0.00%	0.00%	5.42%

Frequently Asked Questions

Can I hold both FBTTX and ETHSX in my portfolio?

FBTTX and ETHSX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FBTTX or ETHSX?

FBTTX has higher volatility (6.86%) compared to ETHSX (4.37%). In terms of maximum drawdown, FBTTX dropped -63.75% vs ETHSX's -90.06%.

Which has better risk-adjusted returns?

FBTTX currently has the higher Sharpe Ratio (2.10 vs 0.19), 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.