SEMI vs. BAMU

Last updated Jun 24, 2026

SEMI (Columbia Select Technology ETF) and BAMU (Brookstone Ultra-Short Bond ETF) are both exchange-traded funds - SEMI is a Semiconductors fund actively managed by Columbia, while BAMU is a Ultrashort Bond fund actively managed by Brookstone. Both are actively managed. Over the past year, SEMI returned 54.26% vs 2.87% for BAMU. At a correlation of -0.03, they often move in opposite directions. SEMI charges 0.75%/yr vs 1.09%/yr for BAMU.

Performance

SEMI vs. BAMU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Select Technology ETF (SEMI) and Brookstone Ultra-Short Bond ETF (BAMU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SEMI achieves a 26.33% return, which is significantly higher than BAMU's 1.18% return.

SEMI

• 1D: -4.96%
• 1M: 3.03%
• YTD: 26.33%
• 6M: 25.43%
• 1Y: 54.26%
• 3Y*: 28.16%
• 5Y*: —
• 10Y*: —

BAMU

• 1D: 0.00%
• 1M: 0.16%
• YTD: 1.18%
• 6M: 1.29%
• 1Y: 2.87%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SEMI vs. BAMU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
SEMI Columbia Select Technology ETF	26.33%	24.91%	15.87%	19.75%
BAMU Brookstone Ultra-Short Bond ETF	1.18%	3.21%	4.14%	1.20%

Correlation

The correlation between SEMI and BAMU is -0.19, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.19
Correlation (All Time) Calculated using the full available price history since Sep 27, 2023	-0.03

The correlation between SEMI and BAMU shifts across timeframes, from -0.19 (1 year) to -0.03 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SEMI vs. BAMU — Risk / Return Rank

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

SEMI

SEMI Risk / Return Rank: 70
SEMI Sharpe Ratio Rank: 71
SEMI Sortino Ratio Rank: 60
SEMI Omega Ratio Rank: 64
SEMI Calmar Ratio Rank: 77
SEMI Martin Ratio Rank: 75

BAMU

BAMU Risk / Return Rank: 98
BAMU Sharpe Ratio Rank: 98
BAMU Sortino Ratio Rank: 98
BAMU Omega Ratio Rank: 98
BAMU Calmar Ratio Rank: 99
BAMU 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.

SEMI vs. BAMU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Select Technology ETF (SEMI) and Brookstone Ultra-Short Bond ETF (BAMU). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	SEMI	BAMU	Difference
Sharpe ratio: Return per unit of total volatility	2.19	4.94	-2.75
Sortino ratio: Return per unit of downside risk	2.72	8.71	-6.00
Omega ratio: Gain probability vs. loss probability	1.37	2.41	-1.04
Calmar ratio: Return relative to maximum drawdown	3.78	24.37	-20.59
Martin ratio: Return relative to average drawdown	13.59	96.52	-82.94

SEMI vs. BAMU - Sharpe Ratio Comparison

The current SEMI Sharpe Ratio is 2.19, which is lower than the BAMU Sharpe Ratio of 4.94. The chart below compares the historical Sharpe Ratios of SEMI and BAMU, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

SEMI vs. BAMU - Drawdown Comparison

The maximum SEMI drawdown since its inception was -33.46%, which is greater than BAMU's maximum drawdown of -0.36%. Use the drawdown chart below to compare losses from any high point for SEMI and BAMU.

Drawdown Indicators

	SEMI	BAMU	Difference
Max Drawdown Largest peak-to-trough decline	-33.46%	-0.36%	-33.10%
Max Drawdown (1Y) Largest decline over 1 year	-14.41%	-0.12%	-14.29%
Max Drawdown (3Y) Largest decline over 3 years	-32.93%	—	—
Current Drawdown Current decline from peak	-4.96%	0.00%	-4.96%
Average Drawdown Average peak-to-trough decline	-9.86%	-0.02%	-9.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.01%	0.03%	+3.98%

Volatility

SEMI vs. BAMU - Volatility Comparison

Columbia Select Technology ETF (SEMI) has a higher volatility of 12.90% compared to Brookstone Ultra-Short Bond ETF (BAMU) at 0.09%. This indicates that SEMI's price experiences larger fluctuations and is considered to be riskier than BAMU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SEMI	BAMU	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.90%	0.09%	+12.81%
Volatility (6M) Calculated over the trailing 6-month period	20.53%	0.39%	+20.14%
Volatility (1Y) Calculated over the trailing 1-year period	24.91%	0.58%	+24.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	31.93%	0.87%	+31.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	31.93%	0.87%	+31.06%

SEMI vs. BAMU - Expense Ratio Comparison

SEMI has a 0.75% expense ratio, which is lower than BAMU's 1.09% expense ratio.

Dividends

SEMI vs. BAMU - Dividend Comparison

SEMI's dividend yield for the trailing twelve months is around 3.55%, more than BAMU's 3.05% yield.

Position	TTM	2025	2024	2023	2022
BAMU Brookstone Ultra-Short Bond ETF	3.05%	3.20%	3.97%	0.84%	0.00%
SEMI Columbia Select Technology ETF	3.55%	4.48%	0.96%	0.87%	0.67%

Frequently Asked Questions

Can I hold both SEMI and BAMU in my portfolio?

SEMI and BAMU have a correlation of -0.19, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SEMI or BAMU?

SEMI has higher volatility (12.90%) compared to BAMU (0.09%). In terms of maximum drawdown, SEMI dropped -33.46% vs BAMU's -0.36%.

Which ETF is better, SEMI or BAMU?

On 1-year performance, SEMI leads with 54.26% vs 2.87% for BAMU. On fees, SEMI is cheaper at 0.75% per year. On volatility, BAMU has been the lower-risk option at 0.09%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, SEMI or BAMU?

Over the 1-year period, SEMI has performed better with a 54.26% return vs 2.87%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, SEMI or BAMU?

SEMI is cheaper with a 0.75% expense ratio, compared with 1.09% for BAMU.

Which ETF pays a higher dividend yield, SEMI or BAMU?

SEMI has the higher dividend yield at 3.55%, compared with 3.05% for BAMU.

What is the main difference between SEMI and BAMU?

SEMI is categorized as Semiconductors, while BAMU is Ultrashort Bond. They also come from different issuers: Columbia and Brookstone. Their fees differ too: 0.75% for SEMI and 1.09% for BAMU.

Which has better risk-adjusted returns?

BAMU currently has the higher Sharpe Ratio (4.94 vs 2.19), 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.