FBTTX vs. FBTAX

Last updated Jun 5, 2026

FBTTX (Fidelity Advisor Biotechnology Fund Class M) and FBTAX (Fidelity Advisor Biotechnology Fund Class A) are both Health & Biotech Equities funds from Fidelity. Over the past 10 years, FBTTX returned 10.36%/yr vs 10.67%/yr for FBTAX. With a 1.00 correlation, they move nearly in lockstep. FBTTX charges 1.28%/yr vs 1.00%/yr for FBTAX.

Performance

FBTTX vs. FBTAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Advisor Biotechnology Fund Class M (FBTTX) and Fidelity Advisor Biotechnology Fund Class A (FBTAX). 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 lower than FBTAX's 0.59% return. Both investments have delivered pretty close results over the past 10 years, with FBTTX having a 10.36% annualized return and FBTAX not far ahead at 10.67%.

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%

FBTAX

• 1D: 1.43%
• 1M: -4.75%
• YTD: 0.59%
• 6M: -3.24%
• 1Y: 46.95%
• 3Y*: 17.55%
• 5Y*: 9.43%
• 10Y*: 10.67%

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

FBTTX vs. FBTAX - 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%
FBTAX Fidelity Advisor Biotechnology Fund Class A	0.59%	39.54%	5.37%	10.70%	-7.95%	-3.10%	32.17%	25.74%	-3.86%	25.80%

Correlation

The correlation between FBTTX and FBTAX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	1.00
Correlation (All Time) Calculated using the full available price history since Dec 28, 2000	1.00

The correlation between FBTTX and FBTAX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

FBTTX vs. FBTAX — 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

FBTAX

FBTAX Risk / Return Rank: 63
FBTAX Sharpe Ratio Rank: 52
FBTAX Sortino Ratio Rank: 48
FBTAX Omega Ratio Rank: 42
FBTAX Calmar Ratio Rank: 93
FBTAX Martin Ratio Rank: 82

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. FBTAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Advisor Biotechnology Fund Class M (FBTTX) and Fidelity Advisor Biotechnology Fund Class A (FBTAX). 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	FBTAX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	2.12	-0.02
Sortino ratio: Return per unit of downside risk	2.87	2.89	-0.02
Omega ratio: Gain probability vs. loss probability	1.34	1.35	0.00
Calmar ratio: Return relative to maximum drawdown	5.17	5.23	-0.06
Martin ratio: Return relative to average drawdown	14.95	15.18	-0.23
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. FBTAX - Sharpe Ratio Comparison

The current FBTTX Sharpe Ratio is 2.10, which is comparable to the FBTAX Sharpe Ratio of 2.12. The chart below compares the historical Sharpe Ratios of FBTTX and FBTAX, 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	FBTAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	2.12	-0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.39	0.40	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.43	0.44	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.30	0.31	-0.01

Drawdowns

FBTTX vs. FBTAX - Drawdown Comparison

The maximum FBTTX drawdown since its inception was -63.75%, roughly equal to the maximum FBTAX drawdown of -63.55%. Use the drawdown chart below to compare losses from any high point for FBTTX and FBTAX.

Drawdown Indicators

	FBTTX	FBTAX	Difference
Max Drawdown Largest peak-to-trough decline	-63.75%	-63.55%	-0.20%
Max Drawdown (1Y) Largest decline over 1 year	-8.94%	-8.91%	-0.03%
Max Drawdown (3Y) Largest decline over 3 years	-32.91%	-32.86%	-0.05%
Max Drawdown (5Y) Largest decline over 5 years	-36.64%	-36.51%	-0.13%
Max Drawdown (10Y) Largest decline over 10 years	-39.04%	-38.82%	-0.22%
Current Drawdown Current decline from peak	-7.64%	-7.61%	-0.03%
Average Drawdown Average peak-to-trough decline	-21.83%	-21.22%	-0.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.09%	3.06%	+0.03%

Volatility

FBTTX vs. FBTAX - Volatility Comparison

Fidelity Advisor Biotechnology Fund Class M (FBTTX) and Fidelity Advisor Biotechnology Fund Class A (FBTAX) have volatilities of 6.86% and 6.88%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FBTTX	FBTAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.86%	6.88%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	16.64%	16.63%	+0.01%
Volatility (1Y) Calculated over the trailing 1-year period	22.03%	22.02%	+0.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.47%	23.48%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.41%	24.42%	-0.01%

FBTTX vs. FBTAX - Expense Ratio Comparison

FBTTX has a 1.28% expense ratio, which is higher than FBTAX's 1.00% expense ratio.

Dividends

FBTTX vs. FBTAX - Dividend Comparison

FBTTX's dividend yield for the trailing twelve months is around 1.53%, more than FBTAX's 1.44% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBTAX Fidelity Advisor Biotechnology Fund Class A	1.44%	1.45%	6.00%	1.15%	0.00%	20.12%	8.37%	6.77%	2.50%	0.00%	0.00%	5.36%
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 FBTAX in my portfolio?

With a correlation of 1.00, FBTTX and FBTAX 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, FBTTX or FBTAX?

FBTAX has higher volatility (6.88%) compared to FBTTX (6.86%). In terms of maximum drawdown, FBTTX dropped -63.75% vs FBTAX's -63.55%.

Which has better risk-adjusted returns?

FBTAX currently has the higher Sharpe Ratio (2.12 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.