BTEKX vs. STK

Last updated Jun 26, 2026

BTEKX (BlackRock Technology Opportunities Fund Class K) and STK (Columbia Seligman Premium Technology Growth Closed Fund) are both Technology Equities funds. Both are actively managed. Over the past 5 years, BTEKX returned 14.80%/yr vs 19.78%/yr for STK. Their correlation of 0.80 suggests significant overlap in exposure. BTEKX charges 0.84%/yr vs 1.26%/yr for STK.

Performance

BTEKX vs. STK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Technology Opportunities Fund Class K (BTEKX) and Columbia Seligman Premium Technology Growth Closed Fund (STK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BTEKX achieves a 36.01% return, which is significantly lower than STK's 48.12% return.

BTEKX

• 1D: 0.51%
• 1M: 0.05%
• YTD: 36.01%
• 6M: 34.34%
• 1Y: 52.48%
• 3Y*: 37.60%
• 5Y*: 14.80%
• 10Y*: —

STK

• 1D: 0.62%
• 1M: -4.34%
• YTD: 48.12%
• 6M: 46.48%
• 1Y: 91.56%
• 3Y*: 34.48%
• 5Y*: 19.78%
• 10Y*: 24.40%

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

BTEKX vs. STK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
BTEKX BlackRock Technology Opportunities Fund Class K	36.01%	20.03%	40.41%	49.56%	-42.95%	8.55%	86.87%	5.72%
STK Columbia Seligman Premium Technology Growth Closed Fund	48.12%	24.85%	17.74%	46.60%	-30.36%	48.63%	25.39%	2.70%

Correlation

The correlation between BTEKX and STK is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (All Time) Calculated using the full available price history since Dec 10, 2019	0.80

The correlation between BTEKX and STK has been stable across timeframes, ranging from 0.79 to 0.83 - a consistent structural relationship.

Return for Risk

BTEKX vs. STK — Risk / Return Rank

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

BTEKX

BTEKX Risk / Return Rank: 59
BTEKX Sharpe Ratio Rank: 64
BTEKX Sortino Ratio Rank: 49
BTEKX Omega Ratio Rank: 57
BTEKX Calmar Ratio Rank: 76
BTEKX Martin Ratio Rank: 49

STK

STK Risk / Return Rank: 94
STK Sharpe Ratio Rank: 98
STK Sortino Ratio Rank: 90
STK Omega Ratio Rank: 90
STK Calmar Ratio Rank: 96
STK Martin Ratio Rank: 97

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.

BTEKX vs. STK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Technology Opportunities Fund Class K (BTEKX) and Columbia Seligman Premium Technology Growth Closed Fund (STK). 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.

	BTEKX	STK	Difference
Sharpe ratio: Return per unit of total volatility	1.88	3.49	-1.60
Sortino ratio: Return per unit of downside risk	2.38	3.94	-1.56
Omega ratio: Gain probability vs. loss probability	1.33	1.57	-0.24
Calmar ratio: Return relative to maximum drawdown	2.92	5.73	-2.82
Martin ratio: Return relative to average drawdown	8.50	23.99	-15.50

BTEKX vs. STK - Sharpe Ratio Comparison

The current BTEKX Sharpe Ratio is 1.88, which is lower than the STK Sharpe Ratio of 3.49. The chart below compares the historical Sharpe Ratios of BTEKX and STK, 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

BTEKX vs. STK - Drawdown Comparison

The maximum BTEKX drawdown since its inception was -49.08%, which is greater than STK's maximum drawdown of -41.74%. Use the drawdown chart below to compare losses from any high point for BTEKX and STK.

Drawdown Indicators

	BTEKX	STK	Difference
Max Drawdown Largest peak-to-trough decline	-49.08%	-41.74%	-7.34%
Max Drawdown (1Y) Largest decline over 1 year	-18.37%	-16.05%	-2.32%
Max Drawdown (3Y) Largest decline over 3 years	-27.72%	-26.59%	-1.13%
Max Drawdown (5Y) Largest decline over 5 years	-49.08%	-36.27%	-12.81%
Max Drawdown (10Y) Largest decline over 10 years	—	-41.74%	—
Current Drawdown Current decline from peak	-5.67%	-7.49%	+1.82%
Average Drawdown Average peak-to-trough decline	-14.91%	-7.41%	-7.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.29%	3.83%	+2.46%

Volatility

BTEKX vs. STK - Volatility Comparison

BlackRock Technology Opportunities Fund Class K (BTEKX) has a higher volatility of 15.70% compared to Columbia Seligman Premium Technology Growth Closed Fund (STK) at 14.10%. This indicates that BTEKX's price experiences larger fluctuations and is considered to be riskier than STK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BTEKX	STK	Difference
Volatility (1M) Calculated over the trailing 1-month period	15.70%	14.10%	+1.60%
Volatility (6M) Calculated over the trailing 6-month period	24.38%	22.66%	+1.72%
Volatility (1Y) Calculated over the trailing 1-year period	28.52%	26.39%	+2.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	28.71%	25.77%	+2.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	29.53%	26.45%	+3.08%

BTEKX vs. STK - Expense Ratio Comparison

BTEKX has a 0.84% expense ratio, which is lower than STK's 1.26% expense ratio.

Dividends

BTEKX vs. STK - Dividend Comparison

BTEKX's dividend yield for the trailing twelve months is around 8.94%, more than STK's 5.09% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BTEKX BlackRock Technology Opportunities Fund Class K	8.94%	12.17%	7.80%	0.00%	0.00%	7.17%	4.46%	0.00%	0.00%	0.00%	0.00%	0.00%
STK Columbia Seligman Premium Technology Growth Closed Fund	5.09%	7.38%	16.02%	6.70%	12.62%	8.48%	6.79%	7.86%	14.88%	11.82%	9.87%	10.32%

Frequently Asked Questions

Can I hold both BTEKX and STK in my portfolio?

BTEKX and STK have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BTEKX or STK?

BTEKX has higher volatility (15.70%) compared to STK (14.10%). In terms of maximum drawdown, BTEKX dropped -49.08% vs STK's -41.74%.

Which has better risk-adjusted returns?

STK currently has the higher Sharpe Ratio (3.49 vs 1.88), 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.