GBIO vs. CEFS

Last updated Jun 6, 2026

GBIO (Generation Bio Co.) is a stock, while CEFS (Saba Closed-End Funds ETF) is Event Driven fund actively managed by Exchange Traded Concepts. At a 0.24 correlation, their price movements are largely independent.

Performance

GBIO vs. CEFS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Generation Bio Co. (GBIO) and Saba Closed-End Funds ETF (CEFS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

GBIO

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

CEFS

• 1D: -2.31%
• 1M: 1.21%
• YTD: 11.63%
• 6M: 14.38%
• 1Y: 22.33%
• 3Y*: 20.99%
• 5Y*: 13.42%
• 10Y*: —

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

GBIO vs. CEFS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
GBIO Generation Bio Co.	-5.99%	-46.42%	-35.76%	-58.02%	-44.49%	-75.03%	14.82%
CEFS Saba Closed-End Funds ETF	11.63%	16.67%	23.48%	20.99%	-7.08%	17.86%	17.51%

Correlation

The correlation between GBIO and CEFS is 0.15, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.15
Correlation (3Y) Calculated over the trailing 3-year period	0.26
Correlation (5Y) Calculated over the trailing 5-year period	0.26
Correlation (All Time) Calculated using the full available price history since Jun 15, 2020	0.24

The correlation between GBIO and CEFS shifts across timeframes, from 0.15 (1 year) to 0.26 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

GBIO vs. CEFS — Risk / Return Rank

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

CEFS

CEFS Risk / Return Rank: 74
CEFS Sharpe Ratio Rank: 69
CEFS Sortino Ratio Rank: 72
CEFS Omega Ratio Rank: 72
CEFS Calmar Ratio Rank: 79
CEFS Martin Ratio Rank: 80

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.

GBIO vs. CEFS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Generation Bio Co. (GBIO) and Saba Closed-End Funds ETF (CEFS). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	GBIO	CEFS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.20	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	1.03	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.78	—

Drawdowns

Drawdown Indicators

	GBIO	CEFS	Difference
Max Drawdown Largest peak-to-trough decline	—	-38.99%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-5.67%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-13.37%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-16.85%	—
Current Drawdown Current decline from peak	—	-2.37%	—
Average Drawdown Average peak-to-trough decline	—	-3.67%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.46%	—

Volatility

Volatility by Period

	GBIO	CEFS	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.15%	—
Volatility (6M) Calculated over the trailing 6-month period	—	8.79%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	10.21%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	13.12%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	15.35%	—

Dividends

GBIO vs. CEFS - Dividend Comparison

GBIO has not paid dividends to shareholders, while CEFS's dividend yield for the trailing twelve months is around 7.23%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
CEFS Saba Closed-End Funds ETF	7.23%	7.84%	8.79%	9.20%	11.32%	10.73%	8.61%	8.10%	10.43%	5.02%
GBIO Generation Bio Co.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both GBIO and CEFS in my portfolio?

GBIO and CEFS have a correlation of 0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.