FBTAX vs. FBDIX

Last updated Jun 4, 2026

FBTAX (Fidelity Advisor Biotechnology Fund Class A) and FBDIX (Franklin Biotechnology Discovery Fund) are both Health & Biotech Equities funds. Over the past 10 years, FBTAX returned 10.51%/yr vs 9.81%/yr for FBDIX. With a 0.95 correlation, they move nearly in lockstep. FBTAX charges 1.00%/yr vs 1.06%/yr for FBDIX.

Performance

FBTAX vs. FBDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Advisor Biotechnology Fund Class A (FBTAX) and Franklin Biotechnology Discovery Fund (FBDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FBTAX achieves a -0.83% return, which is significantly lower than FBDIX's 0.59% return. Over the past 10 years, FBTAX has outperformed FBDIX with an annualized return of 10.51%, while FBDIX has yielded a comparatively lower 9.81% annualized return.

FBTAX

• 1D: -3.05%
• 1M: -5.57%
• YTD: -0.83%
• 6M: -4.16%
• 1Y: 44.32%
• 3Y*: 16.99%
• 5Y*: 9.26%
• 10Y*: 10.51%

FBDIX

• 1D: -4.72%
• 1M: -5.53%
• YTD: 0.59%
• 6M: 1.88%
• 1Y: 59.54%
• 3Y*: 26.59%
• 5Y*: 8.23%
• 10Y*: 9.81%

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

FBTAX vs. FBDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FBTAX Fidelity Advisor Biotechnology Fund Class A	-0.83%	39.54%	5.37%	10.70%	-7.95%	-3.10%	32.17%	25.74%	-3.86%	25.80%
FBDIX Franklin Biotechnology Discovery Fund	0.59%	52.68%	15.37%	18.40%	-12.65%	-27.58%	29.85%	49.11%	-15.77%	18.83%

Correlation

The correlation between FBTAX and FBDIX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Dec 28, 2000	0.95

The correlation between FBTAX and FBDIX has been stable across timeframes, ranging from 0.91 to 0.95 - a consistent structural relationship.

Return for Risk

FBTAX vs. FBDIX — Risk / Return Rank

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

FBTAX

FBTAX Risk / Return Rank: 62
FBTAX Sharpe Ratio Rank: 50
FBTAX Sortino Ratio Rank: 47
FBTAX Omega Ratio Rank: 40
FBTAX Calmar Ratio Rank: 93
FBTAX Martin Ratio Rank: 81

FBDIX

FBDIX Risk / Return Rank: 82
FBDIX Sharpe Ratio Rank: 83
FBDIX Sortino Ratio Rank: 73
FBDIX Omega Ratio Rank: 61
FBDIX Calmar Ratio Rank: 97
FBDIX Martin Ratio Rank: 95

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.

FBTAX vs. FBDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Advisor Biotechnology Fund Class A (FBTAX) and Franklin Biotechnology Discovery Fund (FBDIX). 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.

	FBTAX	FBDIX	Difference
Sharpe ratio Return per unit of total volatility	2.10	2.69	-0.60
Sortino ratio Return per unit of downside risk	2.87	3.54	-0.67
Omega ratio Gain probability vs. loss probability	1.34	1.44	-0.09
Calmar ratio Return relative to maximum drawdown	5.18	6.76	-1.59
Martin ratio Return relative to average drawdown	15.20	23.11	-7.91
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FBTAX vs. FBDIX - Sharpe Ratio Comparison

The current FBTAX Sharpe Ratio is 2.10, which is comparable to the FBDIX Sharpe Ratio of 2.69. The chart below compares the historical Sharpe Ratios of FBTAX and FBDIX, 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

	FBTAX	FBDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	2.69	-0.60
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.40	0.32	+0.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.43	0.37	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.31	0.40	-0.10

Drawdowns

FBTAX vs. FBDIX - Drawdown Comparison

The maximum FBTAX drawdown since its inception was -63.55%, smaller than the maximum FBDIX drawdown of -71.44%. Use the drawdown chart below to compare losses from any high point for FBTAX and FBDIX.

Drawdown Indicators

	FBTAX	FBDIX	Difference
Max Drawdown Largest peak-to-trough decline	-63.55%	-71.44%	+7.89%
Max Drawdown (1Y) Largest decline over 1 year	-8.91%	-9.18%	+0.27%
Max Drawdown (3Y) Largest decline over 3 years	-32.86%	-24.22%	-8.64%
Max Drawdown (5Y) Largest decline over 5 years	-36.51%	-46.83%	+10.32%
Max Drawdown (10Y) Largest decline over 10 years	-38.82%	-53.67%	+14.85%
Current Drawdown Current decline from peak	-8.91%	-9.18%	+0.27%
Average Drawdown Average peak-to-trough decline	-21.22%	-28.74%	+7.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.03%	2.68%	+0.35%

Volatility

FBTAX vs. FBDIX - Volatility Comparison

The current volatility for Fidelity Advisor Biotechnology Fund Class A (FBTAX) is 7.10%, while Franklin Biotechnology Discovery Fund (FBDIX) has a volatility of 8.88%. This indicates that FBTAX experiences smaller price fluctuations and is considered to be less risky than FBDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FBTAX	FBDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.10%	8.88%	-1.78%
Volatility (6M) Calculated over the trailing 6-month period	16.71%	17.92%	-1.21%
Volatility (1Y) Calculated over the trailing 1-year period	22.10%	23.10%	-1.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.47%	25.75%	-2.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.42%	26.33%	-1.91%

FBTAX vs. FBDIX - Expense Ratio Comparison

FBTAX has a 1.00% expense ratio, which is lower than FBDIX's 1.06% expense ratio.

Dividends

FBTAX vs. FBDIX - Dividend Comparison

FBTAX's dividend yield for the trailing twelve months is around 1.47%, less than FBDIX's 10.75% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBDIX Franklin Biotechnology Discovery Fund	10.75%	10.81%	19.53%	0.00%	0.13%	0.98%	14.50%	18.77%	3.72%	2.39%	4.57%	8.42%
FBTAX Fidelity Advisor Biotechnology Fund Class A	1.47%	1.45%	6.00%	1.15%	0.00%	20.12%	8.37%	6.77%	2.50%	0.00%	0.00%	5.36%

Frequently Asked Questions

Can I hold both FBTAX and FBDIX in my portfolio?

With a correlation of 0.93, FBTAX and FBDIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, FBTAX or FBDIX?

FBDIX has higher volatility (8.88%) compared to FBTAX (7.10%). In terms of maximum drawdown, FBTAX dropped -63.55% vs FBDIX's -71.44%.

Which has better risk-adjusted returns?

FBDIX currently has the higher Sharpe Ratio (2.69 vs 2.10), 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.