BBLL.L vs. ERNS.L

Last updated Jun 4, 2026

BBLL.L (JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc)) and ERNS.L (iShares £ Ultrashort Bond UCITS ETF GBP (Dist)) are both exchange-traded funds - BBLL.L is a Government Bonds fund tracking the ICE US Treasury 0-1 Year Index, while ERNS.L is a Ultrashort Bond fund actively managed by iShares. BBLL.L is passively managed, while ERNS.L is actively managed. Over the past year, BBLL.L returned 4.30% vs 4.41% for ERNS.L. At a correlation of -0.09, they often move in opposite directions. BBLL.L charges 0.07%/yr vs 0.09%/yr for ERNS.L.

Performance

BBLL.L vs. ERNS.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc) (BBLL.L) and iShares £ Ultrashort Bond UCITS ETF GBP (Dist) (ERNS.L). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BBLL.L achieves a 1.30% return, which is significantly lower than ERNS.L's 1.52% return.

BBLL.L

• 1D: -0.19%
• 1M: 1.42%
• YTD: 1.30%
• 6M: 0.79%
• 1Y: 4.30%
• 3Y*: —
• 5Y*: —
• 10Y*: —

ERNS.L

• 1D: 0.00%
• 1M: 0.33%
• YTD: 1.52%
• 6M: 1.95%
• 1Y: 4.41%
• 3Y*: 5.06%
• 5Y*: 3.61%
• 10Y*: 2.19%

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

BBLL.L vs. ERNS.L - Yearly Performance Comparison

	2026 (YTD)	2025
BBLL.L JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc)	1.30%	2.34%
ERNS.L iShares £ Ultrashort Bond UCITS ETF GBP (Dist)	1.52%	3.32%

Correlation

The correlation between BBLL.L and ERNS.L is -0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.09
Correlation (All Time) Calculated using the full available price history since Apr 29, 2025	-0.09

Return for Risk

BBLL.L vs. ERNS.L — Risk / Return Rank

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

BBLL.L

BBLL.L Risk / Return Rank: 21
BBLL.L Sharpe Ratio Rank: 21
BBLL.L Sortino Ratio Rank: 20
BBLL.L Omega Ratio Rank: 19
BBLL.L Calmar Ratio Rank: 22
BBLL.L Martin Ratio Rank: 21

ERNS.L

ERNS.L Risk / Return Rank: 98
ERNS.L Sharpe Ratio Rank: 98
ERNS.L Sortino Ratio Rank: 99
ERNS.L Omega Ratio Rank: 98
ERNS.L Calmar Ratio Rank: 99
ERNS.L Martin Ratio Rank: 99

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.

BBLL.L vs. ERNS.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc) (BBLL.L) and iShares £ Ultrashort Bond UCITS ETF GBP (Dist) (ERNS.L). 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.

	BBLL.L	ERNS.L	Difference
Sharpe ratio: Return per unit of total volatility	0.71	5.26	-4.56
Sortino ratio: Return per unit of downside risk	1.06	9.41	-8.35
Omega ratio: Gain probability vs. loss probability	1.12	2.38	-1.26
Calmar ratio: Return relative to maximum drawdown	1.00	20.21	-19.21
Martin ratio: Return relative to average drawdown	2.55	107.87	-105.32
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BBLL.L vs. ERNS.L - Sharpe Ratio Comparison

The current BBLL.L Sharpe Ratio is 0.71, which is lower than the ERNS.L Sharpe Ratio of 5.26. The chart below compares the historical Sharpe Ratios of BBLL.L and ERNS.L, 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

	BBLL.L	ERNS.L	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.71	5.26	-4.56
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	4.33	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	2.37	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	2.23	-1.70

Drawdowns

BBLL.L vs. ERNS.L - Drawdown Comparison

The maximum BBLL.L drawdown since its inception was -4.55%, which is greater than ERNS.L's maximum drawdown of -1.51%. Use the drawdown chart below to compare losses from any high point for BBLL.L and ERNS.L.

Drawdown Indicators

	BBLL.L	ERNS.L	Difference
Max Drawdown Largest peak-to-trough decline	-4.55%	-1.51%	-3.04%
Max Drawdown (1Y) Largest decline over 1 year	-4.55%	-0.22%	-4.33%
Max Drawdown (3Y) Largest decline over 3 years	—	-0.22%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-0.36%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-1.51%	—
Current Drawdown Current decline from peak	-1.43%	-0.03%	-1.40%
Average Drawdown Average peak-to-trough decline	-1.59%	-0.05%	-1.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.78%	0.04%	+1.74%

Volatility

BBLL.L vs. ERNS.L - Volatility Comparison

JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc) (BBLL.L) has a higher volatility of 1.94% compared to iShares £ Ultrashort Bond UCITS ETF GBP (Dist) (ERNS.L) at 0.36%. This indicates that BBLL.L's price experiences larger fluctuations and is considered to be riskier than ERNS.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BBLL.L	ERNS.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.94%	0.36%	+1.58%
Volatility (6M) Calculated over the trailing 6-month period	4.68%	0.68%	+4.00%
Volatility (1Y) Calculated over the trailing 1-year period	6.46%	0.83%	+5.63%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.43%	0.83%	+5.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.43%	0.92%	+5.51%

BBLL.L vs. ERNS.L - Expense Ratio Comparison

BBLL.L has a 0.07% expense ratio, which is lower than ERNS.L's 0.09% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

BBLL.L vs. ERNS.L - Dividend Comparison

BBLL.L has not paid dividends to shareholders, while ERNS.L's dividend yield for the trailing twelve months is around 5.65%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BBLL.L JPMorgan BetaBuilders US Treasury Bond 0-1 yr UCITS ETF USD (Acc)	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
ERNS.L iShares £ Ultrashort Bond UCITS ETF GBP (Dist)	5.65%	4.65%	5.42%	4.54%	1.14%	0.28%	0.75%	1.04%	0.74%	0.52%	0.81%	0.72%

Frequently Asked Questions

Can I hold both BBLL.L and ERNS.L in my portfolio?

BBLL.L and ERNS.L have a correlation of -0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BBLL.L or ERNS.L?

On fees, BBLL.L is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, BBLL.L or ERNS.L?

BBLL.L is cheaper with a 0.07% expense ratio, compared with 0.09% for ERNS.L.

What is the main difference between BBLL.L and ERNS.L?

BBLL.L is categorized as Government Bonds, while ERNS.L is Ultrashort Bond. They also come from different issuers: JPMorgan and iShares. Their fees differ too: 0.07% for BBLL.L and 0.09% for ERNS.L.